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ID Date Author Type Category Subject
  231   Tue Dec 6 16:55:51 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issue

Update at 5pm, GPS times are still in sync.

  230   Tue Dec 6 14:57:33 2016 GabrieleGeneralMeasurementsS1600486 post laser polishing

Note: marked as scratched by Alena

2016-12-06

  • 2:44pm, in chamber, balanced
  • 2:46pm, roughing pump on
  • 2:57pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1165111173
      Excitation (broad band) at 1165111205 (60 s)
      Quiet time after excitation: 1165111267

    • Quiet time before excitation: 1165125697
      Excitation (broad band) at 1165125729 (60 s)
      Quiet time after excitation: 1165125791

    • Quiet time before excitation: 1165140221
      Excitation (broad band) at 1165140253 (60 s)
      Quiet time after excitation: 1165140315

2012-12-07

  • 8:28am, pumps off

Results

2016-11-06 A

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1109.7        4.0692e+07        4.0198e+07        4.1198e+07
1130.4        2.3580e+06        2.3557e+06        2.3604e+06
2533.1        7.2674e+05        7.2562e+05        7.2786e+05
2574.5        5.5540e+04        5.5210e+04        5.5875e+04
4401.1        2.5934e+07        2.5895e+07        2.5973e+07
6677.0        1.1663e+07        1.1655e+07        1.1671e+07
6703.7        1.8348e+06        1.8328e+06        1.8367e+06
6777.9        2.7639e+06        2.7614e+06        2.7664e+06
9432.0        4.2054e+05        4.1564e+05        4.2556e+05
10074.1        9.4578e+06        9.4442e+06        9.4714e+06
10230.6        1.4532e+06        1.4492e+06        1.4572e+06
10269.5        1.4339e+06        1.3237e+06        1.5641e+06
10272.5        1.5802e+06        1.4639e+06        1.7167e+06
12113.0        2.2279e+06        2.1313e+06        2.3336e+06
12551.0        5.5340e+06        5.3374e+06        5.7457e+06
12554.0        5.7261e+06        5.5380e+06        5.9273e+06
12576.7        5.2804e+06        5.2660e+06        5.2949e+06
12699.5        1.5337e+06        1.5252e+06        1.5423e+06
13995.0        6.9111e+06        6.8879e+06        6.9344e+06
15884.1        3.2752e+06        3.2367e+06        3.3146e+06
15893.1        6.3130e+06        6.2429e+06        6.3847e+06
16140.4        2.7621e+06        2.7335e+06        2.7913e+06
18082.4        3.2628e+06        3.2181e+06        3.3087e+06
18409.4        9.3191e+06        9.2638e+06        9.3749e+06
20070.5        2.6063e+06        2.5545e+06        2.6603e+06
21087.5        1.8021e+07        1.7921e+07        1.8121e+07
23270.0        6.6877e+06        6.2852e+06        7.1452e+06
23284.2        6.4198e+06        6.3502e+06        6.4909e+06
24426.4        5.9323e+06        5.7957e+06        6.0754e+06
26801.1        1.5681e+07        1.5517e+07        1.5848e+07
28528.9        9.4049e+06        9.2822e+06        9.5309e+06
30807.6        7.0927e+06        6.9400e+06        7.2523e+06
31637.3        4.9001e+06        4.7168e+06        5.0982e+06

2016-12-06 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1110.0        4.0898e+07        4.0699e+07        4.1098e+07
1130.4        2.4968e+06        2.4940e+06        2.4995e+06
2533.1        3.0816e+05        3.0712e+05        3.0921e+05
2574.6        5.1835e+04        5.1723e+04        5.1948e+04
4400.9        2.6081e+07        2.6051e+07        2.6110e+07
6676.8        1.4510e+07        1.4498e+07        1.4522e+07
6703.5        1.7594e+06        1.7575e+06        1.7614e+06
6777.9        2.5212e+06        2.5190e+06        2.5234e+06
9432.2        4.6496e+05        4.6114e+05        4.6885e+05
10041.0        8.9046e+06        8.7097e+06        9.1084e+06
10074.2        9.2417e+06        9.2291e+06        9.2544e+06
10118.0        9.3278e+06        9.1242e+06        9.5408e+06
10215.5        2.5297e+06        2.3859e+06        2.6918e+06
10230.5        1.4901e+06        1.4844e+06        1.4959e+06
12576.6        4.8231e+06        4.8087e+06        4.8375e+06
12699.5        1.5633e+06        1.5547e+06        1.5720e+06
13994.9        6.6141e+06        6.5947e+06        6.6336e+06
15883.1        2.9889e+06        2.9608e+06        3.0175e+06
15893.0        5.8882e+06        5.7626e+06        6.0194e+06
16140.5        2.3710e+06        2.3026e+06        2.4436e+06
18082.5        3.1473e+06        3.0782e+06        3.2196e+06
18409.5        8.9605e+06        8.8329e+06        9.0918e+06
20069.6        2.6341e+06        2.5542e+06        2.7192e+06
21087.5        2.2138e+07        2.1593e+07        2.2711e+07
23261.5        8.4257e+06        8.0368e+06        8.8541e+06
23284.2        7.7673e+06        7.6967e+06        7.8392e+06
24677.4        3.7815e+06        3.6917e+06        3.8759e+06
26800.7        1.5883e+07        1.5612e+07        1.6163e+07
28528.6        6.3924e+06        6.2850e+06        6.5035e+06
28547.0        6.6445e+06        6.3100e+06        7.0164e+06
28697.5        3.4170e+06        3.2882e+06        3.5564e+06

 

2016-12-06 C

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1110.0        3.9831e+07        3.9595e+07        4.0070e+07
1130.4        2.5187e+06        2.5146e+06        2.5228e+06
2533.1        2.0051e+05        1.9944e+05        2.0158e+05
2574.7        5.0078e+04        4.9947e+04        5.0209e+04
4401.0        2.6148e+07        2.6116e+07        2.6180e+07
4466.0        1.9195e+05        1.8808e+05        1.9597e+05
6677.0        1.6348e+07        1.6334e+07        1.6362e+07
6703.5        1.7691e+06        1.7676e+06        1.7707e+06
6777.6        2.2974e+06        2.2951e+06        2.2997e+06
9432.0        4.9962e+05        4.9753e+05        5.0173e+05
9438.0        5.1125e+05        4.7959e+05        5.4738e+05
9440.0        5.2633e+05        4.8682e+05        5.7282e+05
10038.5        9.6023e+06        9.3617e+06        9.8556e+06
10074.1        8.9653e+06        8.9527e+06        8.9779e+06
10117.5        9.1766e+06        8.9495e+06        9.4154e+06
10230.4        1.5302e+06        1.5227e+06        1.5378e+06
12576.4        4.6067e+06        4.5948e+06        4.6186e+06
12699.5        1.5834e+06        1.5749e+06        1.5919e+06
13994.8        9.3708e+06        9.3458e+06        9.3960e+06
15883.5        2.8463e+06        2.8018e+06        2.8922e+06
15893.0        5.7257e+06        5.6080e+06        5.8485e+06
16140.1        1.4682e+06        1.4471e+06        1.4899e+06
18082.9        3.1445e+06        3.1008e+06        3.1894e+06
18410.0        9.7225e+06        9.5594e+06        9.8912e+06
20072.6        2.7615e+06        2.6596e+06        2.8716e+06
21087.0        1.8180e+07        1.8047e+07        1.8314e+07
23284.1        8.7746e+06        8.6857e+06        8.8653e+06
24426.3        4.6250e+06        4.5275e+06        4.7268e+06
24678.1        3.9254e+06        3.8243e+06        4.0320e+06
26801.1        1.5859e+07        1.5532e+07        1.6201e+07
28528.5        4.8476e+06        4.7219e+06        4.9801e+06
29936.0        1.0024e+07        9.7180e+06        1.0351e+07
30807.4        6.6210e+06        6.4586e+06        6.7918e+06

 

 

 

  229   Tue Dec 6 11:22:58 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issue

I swapped the SR signal generator with an Agilent 33210A. Shut down and restarted the cymac3. Now the command line GPS and the IOP model GPS are aligned within one second. Let's see if it stays this way.

 

Quote:

UPDATE:

Now the time difference is about 30 seconds. It seems that the real time model is about 29 seconds advanced with respect to the GPS time one gets from a python script command running on the cymac3

The GPS time I get from python is the same I get from a shell script on the workstation or on the cymac3. I checked that it is also consistent with the GPS time on cymac2.

I moved the picomotors at precise times and looked at the data in the frames. Indeed the data has the wrong time stamp.

Quote:

Things seems to be worse now. This morning I injected noise at GPS 1165078533 (real time, as obtained from the python command line, and consistent with what displayed in the MEDM screen) and found the injection in the data at GPS 1165078555, so 22 seconds later...

Quote:

For a long time I had problems with the GPS time in frames being different from the real one.

This morning I rebooted the cymac3 and swapped the function generator with a new one.

I tested the GPS time in frames by switching on teh ESD noise at a given GPS time and checking the frames. The times are aligned.

I'll have to wait and see if this remains stable over time (in the past i saw an acculation of few seconds per day)

 

EDIT: I checked the two SR DS345 one against the other. Indeed, when bpth set to generate 65536 Hz, there is a continuos drift in the relative phase, accounting for one cycle over about 3.9 seconds. This would sum up to one second over ~256000 seconds, or about 3.5 days. It seems more or less comparable with the amount of GPS time mis-syncronization I saw. I'll have to wait a few days to see if the new clock is stable.

 

 

 

  228   Tue Dec 6 10:38:19 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issue

UPDATE:

Now the time difference is about 30 seconds. It seems that the real time model is about 29 seconds advanced with respect to the GPS time one gets from a python script command running on the cymac3

The GPS time I get from python is the same I get from a shell script on the workstation or on the cymac3. I checked that it is also consistent with the GPS time on cymac2.

I moved the picomotors at precise times and looked at the data in the frames. Indeed the data has the wrong time stamp.

Quote:

Things seems to be worse now. This morning I injected noise at GPS 1165078533 (real time, as obtained from the python command line, and consistent with what displayed in the MEDM screen) and found the injection in the data at GPS 1165078555, so 22 seconds later...

Quote:

For a long time I had problems with the GPS time in frames being different from the real one.

This morning I rebooted the cymac3 and swapped the function generator with a new one.

I tested the GPS time in frames by switching on teh ESD noise at a given GPS time and checking the frames. The times are aligned.

I'll have to wait and see if this remains stable over time (in the past i saw an acculation of few seconds per day)

 

EDIT: I checked the two SR DS345 one against the other. Indeed, when bpth set to generate 65536 Hz, there is a continuos drift in the relative phase, accounting for one cycle over about 3.9 seconds. This would sum up to one second over ~256000 seconds, or about 3.5 days. It seems more or less comparable with the amount of GPS time mis-syncronization I saw. I'll have to wait a few days to see if the new clock is stable.

 

 

  227   Tue Dec 6 09:02:17 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issue

Things seems to be worse now. This morning I injected noise at GPS 1165078533 (real time, as obtained from the python command line, and consistent with what displayed in the MEDM screen) and found the injection in the data at GPS 1165078555, so 22 seconds later...

Quote:

For a long time I had problems with the GPS time in frames being different from the real one.

This morning I rebooted the cymac3 and swapped the function generator with a new one.

I tested the GPS time in frames by switching on teh ESD noise at a given GPS time and checking the frames. The times are aligned.

I'll have to wait and see if this remains stable over time (in the past i saw an acculation of few seconds per day)

 

EDIT: I checked the two SR DS345 one against the other. Indeed, when bpth set to generate 65536 Hz, there is a continuos drift in the relative phase, accounting for one cycle over about 3.9 seconds. This would sum up to one second over ~256000 seconds, or about 3.5 days. It seems more or less comparable with the amount of GPS time mis-syncronization I saw. I'll have to wait a few days to see if the new clock is stable.

 

  226   Mon Dec 5 16:35:05 2016 GabrieleElectronicsGeneralHigh voltage relais

We want to be able to drive any combination of the four samples in the new setup, by using only one HV amplifier.

So I designed and built a remotely controlled relay box: one HV input and four HV outputs, controlled by four relais. The relais can be switched using a logic signal coming from DAC channels.

The system is finished, tested and working. Details in D1600456

  225   Mon Dec 5 12:59:48 2016 GabrieleGeneralMeasurementsS1600485 post laser polishing

2016-12-05

  • 12:45pm, in chamber, balanced
  • 12:46pm, roughing pump on
  • 12:59pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1165019273
      Excitation (broad band) at 1165019305 (60 s)
      Quiet time after excitation: 1165019367

    • Quiet time before excitation: 1165033797
      Excitation (broad band) at 1165033829 (60 s)
      Quiet time after excitation: 1165033891

    • Quiet time before excitation: 1165048321
      Excitation (broad band) at 1165048353 (60 s)
      Quiet time after excitation: 1165048415

 

2016-12-06

  • Excitations:
    • Quiet time before excitation: 1165079000
      Excitation (broad band) at 1165079032 (60 s)
      Quiet time after excitation: 1165079094

  •  

    11:02am, pumps off

  224   Mon Dec 5 10:39:16 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issue

For a long time I had problems with the GPS time in frames being different from the real one.

This morning I rebooted the cymac3 and swapped the function generator with a new one.

I tested the GPS time in frames by switching on teh ESD noise at a given GPS time and checking the frames. The times are aligned.

I'll have to wait and see if this remains stable over time (in the past i saw an acculation of few seconds per day)

 

EDIT: I checked the two SR DS345 one against the other. Indeed, when bpth set to generate 65536 Hz, there is a continuos drift in the relative phase, accounting for one cycle over about 3.9 seconds. This would sum up to one second over ~256000 seconds, or about 3.5 days. It seems more or less comparable with the amount of GPS time mis-syncronization I saw. I'll have to wait a few days to see if the new clock is stable.

  223   Fri Dec 2 14:05:47 2016 GabrieleGeneralGeneralMIT bare disk losses reproduced with edge and surface losses

The measured losses of the MIT bare disk show a remarkable split into families. The plot belo shows the measured total loss angles (error bars comes from dispersion of multiple measurements)

Using a COMSOL model, and tuning some parameters (E = 73.2 GPa, nu = 0.164, rho = 2202 kg/m^3, thickness = 0.511 mm) I can roughly reproduce the measured mode frequencies, within some tens of Hz:

There is still some splitting into families, so my guess is that the Poisson ratio is not quite right. But this is good enough for now. From this simulation, I can extract the various energies (bulk and shear) in different domains. In particular I'm focusing on the edge and surface energies. The following plot shows the ratio of shear/bulk edge energies over the total energy, as an example.

Now I used the edge shear energy ratio and the surface bulk energy ratio, and that's enough to reproduce the distribution of the measured loss angles:

The measured losses are well described by the following equation:

loss = 4.8e-6 * E_surface_bulk / E_tot + 1.2e-3 * E_edge_shear

The energy ratios here are not dimensionless, since they are the result of a surface integral over a volume integral. So to extract the real loss angles of the surface/edge defects we have to estimate the thickness of the surface/edge lossy area.

Attachment 4: losses_fit.png
losses_fit.png
  222   Fri Dec 2 11:20:56 2016 GabrieleGeneralMeasurementsS1600484 after laser polishing

2016-12-02

  • 11:08am, in chamber, balanced
  • 11:10am, roughing pump on
  • 11:20am, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1164752200
      Quiet time after excitation: 1164752486   
    • Quiet time before excitation: 1164763364
      Excitation (broad band) at 1164763397 (60 s)
      Quiet time after excitation: 1164763459

    • Quiet time before excitation: 1164774289
      Excitation (broad band) at 1164774322 (60 s)
      Quiet time after excitation: 1164774384

    • Quiet time before excitation: 1164785214
      Excitation (broad band) at 1164785246 (60 s)
      Quiet time after excitation: 1164785308

2016-12-05

  • 8:49am, pumps off

​Results

2016-12-02 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1123.6        4.4547e+07        4.4226e+07        4.4872e+07
1144.4        1.6095e+06        1.6080e+06        1.6111e+06
2507.2        1.9029e+07        1.8865e+07        1.9196e+07
2565.7        2.1672e+07        2.1661e+07        2.1682e+07
2606.5        1.0177e+06        1.0172e+06        1.0182e+06
2623.7        2.0058e+07        1.9885e+07        2.0233e+07
4457.8        2.8825e+06        2.8820e+06        2.8831e+06
4516.0        2.6781e+06        2.6373e+06        2.7203e+06
6732.1        1.7486e+07        1.7413e+07        1.7561e+07
6762.2        2.8949e+07        2.8860e+07        2.9037e+07
6790.3        1.8633e+07        1.8630e+07        1.8635e+07
6848.5        1.7815e+07        1.7740e+07        1.7891e+07
6865.9        7.9181e+05        7.9078e+05        7.9284e+05
9554.0        7.0446e+06        7.0433e+06        7.0458e+06
10202.5        8.8916e+06        8.8889e+06        8.8942e+06
10359.4        2.3946e+06        2.3839e+06        2.4054e+06
12739.3        2.2738e+06        2.2716e+06        2.2761e+06
12862.8        1.0330e+06        1.0289e+06        1.0371e+06
14171.9        5.1086e+06        5.0988e+06        5.1184e+06
16096.9        1.9349e+07        1.9326e+07        1.9373e+07
16348.0        8.4181e+06        8.4141e+06        8.4222e+06
18641.8        6.9884e+05        6.8917e+05        7.0877e+05
18815.5        7.5157e+05        7.3926e+05        7.6430e+05
19704.4        2.3376e+06        2.2789e+06        2.3995e+06
20273.5        1.0526e+06        1.0311e+06        1.0750e+06
20328.5        7.7314e+06        7.6796e+06        7.7839e+06
23576.6        1.1741e+07        1.1730e+07        1.1751e+07
24737.7        3.0533e+06        3.0023e+06        3.1059e+06
25614.3        4.3903e+06        4.3015e+06        4.4828e+06
27132.2        9.7722e+06        9.7162e+06        9.8289e+06
28887.1        1.4755e+07        1.4722e+07        1.4789e+07
28987.2        1.2025e+07        1.2004e+07        1.2045e+07
29051.1        1.3645e+07        1.3564e+07        1.3728e+07

2016-12-02 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1124.0        4.7359e+07        4.6976e+07        4.7747e+07
1144.5        1.6369e+06        1.6353e+06        1.6385e+06
2566.0        2.2381e+07        2.2368e+07        2.2393e+07
2606.6        1.0081e+06        1.0075e+06        1.0088e+06
4458.0        2.8784e+06        2.8774e+06        2.8794e+06
4516.0        2.9668e+06        2.8935e+06        3.0440e+06
6762.6        2.9139e+07        2.9072e+07        2.9207e+07
6790.6        1.9114e+07        1.9109e+07        1.9120e+07
9554.5        6.8250e+06        6.8030e+06        6.8471e+06
10203.1        8.7899e+06        8.7697e+06        8.8102e+06
12740.0        2.4202e+06        2.3984e+06        2.4424e+06
12863.4        1.0943e+06        1.0904e+06        1.0982e+06
14172.7        5.0284e+06        5.0177e+06        5.0391e+06
16083.0        2.0692e+07        2.0436e+07        2.0954e+07
16097.8        1.9626e+07        1.9621e+07        1.9632e+07
16348.8        8.5943e+06        8.5814e+06        8.6073e+06
19702.0        2.3940e+06        2.3434e+06        2.4468e+06
20329.4        8.0641e+06        8.0297e+06        8.0988e+06
23578.0        1.0707e+07        1.0675e+07        1.0740e+07
24739.0        3.2440e+06        3.1722e+06        3.3191e+06
27134.0        9.9640e+06        9.7155e+06        1.0226e+07
28888.5        1.5363e+07        1.5278e+07        1.5449e+07
28989.0        1.1648e+07        1.1623e+07        1.1672e+07
29052.5        1.3554e+07        1.3321e+07        1.3795e+07
29499.4        7.0586e+06        6.9311e+06        7.1908e+06
31172.0        3.4291e+06        3.3377e+06        3.5257e+06

2016-12-02 C

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1124.0        4.6838e+07        4.6384e+07        4.7300e+07
1144.4        1.6698e+06        1.6673e+06        1.6723e+06
2507.0        2.0602e+07        1.9878e+07        2.1380e+07
2565.9        2.2525e+07        2.2512e+07        2.2537e+07
2606.6        9.8280e+05        9.8213e+05        9.8346e+05
2623.7        2.1807e+07        2.1557e+07        2.2063e+07
3899.0        3.0267e+04        2.9315e+04        3.1283e+04
4458.1        2.7345e+06        2.7334e+06        2.7356e+06
6732.5        1.9119e+07        1.8913e+07        1.9331e+07
6762.8        2.9093e+07        2.9009e+07        2.9178e+07
6790.8        1.9322e+07        1.9319e+07        1.9326e+07
6849.1        1.9659e+07        1.8960e+07        2.0411e+07
9554.7        6.7030e+06        6.6940e+06        6.7121e+06
10203.4        8.7345e+06        8.7251e+06        8.7439e+06
12740.2        2.5144e+06        2.5080e+06        2.5208e+06
12863.7        1.1036e+06        1.1020e+06        1.1052e+06
14173.1        4.8696e+06        4.8578e+06        4.8816e+06
16098.1        1.9691e+07        1.9678e+07        1.9704e+07
16349.2        8.7666e+06        8.7590e+06        8.7743e+06
18643.4        1.2705e+06        1.2651e+06        1.2760e+06
20275.1        6.7929e+05        6.7513e+05        6.8350e+05
20330.0        8.2770e+06        8.2439e+06        8.3104e+06
23578.5        9.5784e+06        9.5536e+06        9.6034e+06
27134.5        1.0034e+07        9.9648e+06        1.0104e+07
28889.4        1.5698e+07        1.5572e+07        1.5827e+07
28989.3        1.0586e+07        1.0515e+07        1.0658e+07
31205.0        7.2273e+05        7.0149e+05        7.4531e+05

 

 

  221   Fri Dec 2 10:56:40 2016 GabrieleGeneralMeasurementsCleaning improves the Q values a bit

The plot below compares the measured Q values of S1600433 right after annealing, and after GariLynn cleaned it. Q values are in general improved a bit after cleaning.

Attachment 1: cleaning.png
cleaning.png
  220   Thu Dec 1 11:59:21 2016 Gabriele, AlastairGeneralGeneralLaser polishing

Today we laser polished S1600484, S1600485 and S1600486.

  219   Thu Dec 1 11:55:09 2016 GabrieleGeneralMeasurementsS1600433

Note: sample deep cleaned by GariLynn

2016-12-01

  • 11:45am, installed back the movable alignment ring, realigned optical setup to horizontal reference
  • 11:52am, sample in chamber, balanced
  • 11:54am, roughing pump on
  • 12:06pm, turbo pump on
  • Excitations
    • Quiet time before excitation: 1164664951
      Excitation (broad band) at 1164665116 (60 s)
      Quiet time after excitation: 1164665178

    • Quiet time before excitation: 1164676008
      Excitation (broad band) at 1164676041 (60 s)
      Quiet time after excitation: 1164676103

    • Quiet time before excitation: 1164686933
      Excitation (broad band) at 1164686965 (60 s)
      Quiet time after excitation: 1164687027

​2016-12-02

  • 08:57am, pumps off

Results

2016-12-01 A

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1112.0        5.4758e+06        5.4729e+06        5.4787e+06
2550.1        2.3526e+06        2.3516e+06        2.3535e+06
3382.9        3.0202e+06        3.0098e+06        3.0307e+06
3653.0        1.9478e+06        1.8176e+06        2.0980e+06
3661.7        2.7811e+06        2.7725e+06        2.7898e+06
4442.3        2.1488e+06        2.1482e+06        2.1493e+06
5100.1        2.2806e+06        2.2621e+06        2.2994e+06
6777.9        1.8246e+06        1.8243e+06        1.8249e+06
6788.5        8.1295e+06        8.1231e+06        8.1360e+06
6858.4        1.1642e+06        1.1639e+06        1.1645e+06
9548.2        1.4693e+06        1.4689e+06        1.4697e+06
10233.4        5.5505e+06        5.5477e+06        5.5533e+06
10395.9        1.7065e+06        1.7020e+06        1.7110e+06
12744.0        1.2980e+06        1.2957e+06        1.3003e+06
12877.4        5.4532e+05        5.4335e+05        5.4731e+05
14209.0        5.1790e+06        5.1761e+06        5.1819e+06
16123.1        1.2440e+06        1.2389e+06        1.2492e+06
16368.9        1.1801e+06        1.1759e+06        1.1842e+06
18686.0        3.7107e+06        3.6795e+06        3.7424e+06
20365.0        4.7226e+05        4.6383e+05        4.8101e+05
21414.0        8.2349e+06        8.2195e+06        8.2503e+06
23628.1        3.4507e+06        3.4303e+06        3.4714e+06
24797.0        9.7549e+05        9.5712e+05        9.9458e+05
27208.4        6.8971e+06        6.8561e+06        6.9387e+06
28943.4        2.1728e+06        2.1506e+06        2.1954e+06
29052.0        1.6619e+06        1.6301e+06        1.6950e+06

2016-12-01 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1111.6        5.5847e+06        5.5812e+06        5.5883e+06
2266.3        1.3702e+06        1.3669e+06        1.3734e+06
2549.9        2.5450e+06        2.5440e+06        2.5460e+06
4441.9        2.1936e+06        2.1932e+06        2.1940e+06
6777.6        1.8629e+06        1.8627e+06        1.8632e+06
6788.7        8.2746e+06        8.2724e+06        8.2768e+06
6858.2        1.0572e+06        1.0570e+06        1.0574e+06
9547.9        1.5059e+06        1.5015e+06        1.5104e+06
10232.8        5.6628e+06        5.6586e+06        5.6670e+06
10395.5        1.7751e+06        1.7661e+06        1.7841e+06
12743.6        1.3335e+06        1.3303e+06        1.3366e+06
12876.9        5.6054e+05        5.5828e+05        5.6281e+05
14208.4        5.3425e+06        5.3382e+06        5.3467e+06
16122.6        1.2447e+06        1.2410e+06        1.2483e+06
16368.3        1.2426e+06        1.2345e+06        1.2507e+06
20364.4        4.2334e+05        4.1748e+05        4.2936e+05
21413.3        8.0393e+06        7.9669e+06        8.1131e+06
23627.2        3.5157e+06        3.4930e+06        3.5387e+06
24056.0        1.2755e+06        1.2481e+06        1.3041e+06
24796.0        1.0108e+06        1.0054e+06        1.0162e+06
27207.0        7.1155e+06        7.0025e+06        7.2323e+06
28942.4        2.1872e+06        2.1597e+06        2.2154e+06
29051.0        1.7084e+06        1.6660e+06        1.7531e+06
31093.6        6.3519e+05        6.2958e+05        6.4090e+05

2016-12-1 C

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1111.6        5.6533e+06        5.6500e+06        5.6566e+06
2549.9        2.6212e+06        2.6202e+06        2.6223e+06
2559.0        2.1495e+06        2.0914e+06        2.2109e+06
4441.9        2.2212e+06        2.2200e+06        2.2224e+06
6777.6        1.8851e+06        1.8847e+06        1.8855e+06
6789.0        8.3315e+06        8.3301e+06        8.3330e+06
6858.0        9.6935e+05        9.6913e+05        9.6957e+05
9547.6        1.5145e+06        1.5142e+06        1.5148e+06
10232.7        5.8532e+06        5.8516e+06        5.8549e+06
10395.3        1.7902e+06        1.7892e+06        1.7912e+06
12743.3        1.3459e+06        1.3452e+06        1.3465e+06
12876.7        5.7790e+05        5.7717e+05        5.7863e+05
14208.1        5.3736e+06        5.3686e+06        5.3786e+06
16122.2        1.3398e+06        1.3364e+06        1.3433e+06
16368.0        1.2740e+06        1.2713e+06        1.2767e+06
21412.7        8.0909e+06        8.0738e+06        8.1080e+06
23626.7        3.5651e+06        3.5395e+06        3.5909e+06
24795.2        1.0188e+06        1.0092e+06        1.0285e+06
28941.6        2.2120e+06        2.1966e+06        2.2277e+06

 

 

  218   Wed Nov 30 10:02:20 2016 GabrieleGeneralMeasurementsMIT sample 4 (disk with 3 1"/0.1mm glued blanks)

2016-11-30

  • 9:57am, in chamber, balanced, glued balnks facing down
  • 9:59am, roughing pump on
  • 10:09am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1164570059
      Excitation (broad band) at 1164570091 (60 s)
      Quiet time after excitation: 1164570153

    • Quiet time before excitation: 1164571983
      Excitation (broad band) at 1164572015 (60 s)
      Quiet time after excitation: 1164572077

    • Quiet time before excitation: 1164573907
      Excitation (broad band) at 1164573939 (60 s)
      Quiet time after excitation: 1164574001

    • Quiet time before excitation: 1164575831
      Excitation (broad band) at 1164575863 (60 s)
      Quiet time after excitation: 1164575925

  • 3:34pm, pumps off

​Results

2016-11-30 A

% Freq        Q1                Q2
329.0         8.3663e+04        8.3663e+04
764.8         6.6913e+04        6.6913e+04
1093.6        7.4978e+04        7.4978e+04
1173.2        4.7789e+04        4.7789e+04
1333.5        5.8904e+04        5.8904e+04
1529.0        6.9659e+04        6.9659e+04
1597.4        1.0552e+05        1.0552e+05
1748.0        4.8237e+04        4.8237e+04
2007.8        3.8014e+04        3.8014e+04
2017.3        6.4686e+04        6.4686e+04
2066.8        4.6047e+04        4.6047e+04
2077.3        5.7698e+04        5.7698e+04
2832.1        4.1680e+04        4.1680e+04
2850.9        6.3764e+04        6.3764e+04
3101.5        2.6027e+04        2.6027e+04
3468.7        1.9827e+04        1.9827e+04
3784.7        3.5492e+04        3.5492e+04
4301.1        3.6826e+04        3.6826e+04
4822.6        6.6123e+04        6.6123e+04
4834.9        4.6789e+04        4.6789e+04
6014.6        6.6507e+04        6.6507e+04

2016-11-30 B

% Freq        Q
328.8         8.5064e+04
764.6         6.7065e+04
1093.6        6.4289e+04
1173.2        4.7921e+04
1333.5        5.8311e+04
1529.0        6.4720e+04
1597.4        1.5015e+05
1748.4        4.2924e+04
2007.7        4.1694e+04
2017.4        6.3609e+04
2067.0        4.6240e+04
2077.2        5.8395e+04
2406.0        4.5908e+04
2832.1        4.5323e+04
2851.0        6.4089e+04
3101.5        2.9677e+04
3468.7        1.6697e+04
3784.5        2.1703e+04
4299.7        3.7688e+04
4835.1        4.6841e+04
5659.7        3.4913e+04

2016-11-30 C

% Freq        Q
329.1         8.3839e+04
658.0         8.6457e+04
764.6         6.6619e+04
1093.7        7.3246e+04
1163.3        2.7214e+04
1172.5        4.1708e+04
1333.7        5.9429e+04
1597.4        1.4036e+05
1748.0        2.8271e+04
2007.8        4.7532e+04
2017.4        6.5563e+04
2067.0        4.5528e+04
2077.2        5.8753e+04
2346.0        3.4762e+04
2832.1        3.9431e+04
2851.1        6.4498e+04
3101.5        3.0334e+04
3469.0        1.6427e+04
3784.7        5.0161e+04
4299.8        4.0081e+04
4835.2        5.3962e+04
4860.0        5.4326e+04
5659.8        3.5224e+04
6015.4        4.6382e+04
8739.5        4.7841e+04

 

 

Attachment 2: 2016-11-30_09.57.45.jpg
2016-11-30_09.57.45.jpg
  217   Tue Nov 29 17:06:13 2016 GabrieleElectronicsConfigurationChanged whitening filters of four more boards

I modified four more QPD boards to implement the new whitening filters detailed in elog 207.

  216   Tue Nov 29 17:02:06 2016 GabrieleFacilityNoise huntingSuspending the roughing pump

I suspended the roughing pump with four springs. The reduction of the 58 Hz peak is similar to what I got when the pump was sitting on a box. So most of the coupling is due to acousting noise.

Attachment 1: 2016-11-29_11.08.17.jpg
2016-11-29_11.08.17.jpg
  215   Tue Nov 29 16:42:51 2016 GabrieleGeneralMeasurementsMIT sample 3 (disk with 4 0.5"/0.125" glued blanks)

2016-11-29

  • 4:40pm, in chamber, blanks facing down
  • 4:41pm, roughing pump on
  • 4:53pm, turbo pump on
  • Injections:
    • Quiet time before excitation: 1164516798
      Excitation (broad band) at 1164516830 (60 s)
      Quiet time after excitation: 1164516892

    • Quiet time before excitation: 1164518722
      Excitation (broad band) at 1164518754 (60 s)
      Quiet time after excitation: 1164518816

    • Quiet time before excitation: 1164520646
      Excitation (broad band) at 1164520678 (60 s)
      Quiet time after excitation: 1164520740

    • Quiet time before excitation: 1164522570
      Excitation (broad band) at 1164522602 (60 s)
      Quiet time after excitation: 1164522664

    • Quiet time before excitation: 1164524494
      Excitation (broad band) at 1164524526 (60 s)
      Quiet time after excitation: 1164524588

    • Quiet time before excitation: 1164526419
      Excitation (broad band) at 1164526451 (60 s)
      Quiet time after excitation: 1164526513

2016-11-30

  • 9:05am, pumps off

Results

2016-11-29 A

% Freq       Q1                Q2
251.9        2.8630e+04        2.8630e+04
270.6        4.3984e+04        4.3984e+04
329.0        5.2792e+04        5.2792e+04
387.4        6.4408e+04        6.4408e+04
692.9        2.1202e+04        2.1202e+04
705.5        2.7294e+04        2.7294e+04
1121.5        1.9490e+04        1.9490e+04
1127.2        2.3102e+04        2.3102e+04
1242.2        1.6168e+04        1.6168e+04
1318.1        2.5395e+04        2.5395e+04
1800.6        2.3235e+04        2.3235e+04
2124.1        1.8960e+04        1.8960e+04
2797.5        9.8183e+03        9.8183e+03
2841.8        1.1002e+04        1.1002e+04
2921.3        1.2820e+04        1.2820e+04
2959.7        7.8878e+03        7.8878e+03
3701.0        8.0007e+03        8.0007e+03
3839.4        1.3538e+04        1.3538e+04
4692.3        3.4420e+04        3.4420e+04

2016-11-29 B

% Freq        Q1                Q2
251.9         2.6513e+04        2.6513e+04
329.0         5.4964e+04        5.4964e+04
387.0         5.9983e+04        5.9983e+04
692.9         2.4150e+04        2.4150e+04
705.4         2.7301e+04        2.7301e+04
1127.3        1.8674e+04        1.8674e+04
1242.1        1.2792e+04        1.2792e+04
1318.1        2.4187e+04        2.4187e+04
1800.7        2.2498e+04        2.2498e+04
2124.2        1.8534e+04        1.8534e+04
2797.5        9.8734e+03        9.8734e+03
2841.6        1.2921e+04        1.2921e+04
2959.8        1.0940e+04        1.0940e+04
3400.4        1.5128e+04        1.5128e+04
3700.7        1.0732e+04        1.0732e+04
4692.2        4.3243e+04        4.3243e+04

2016-11-29 C

% Freq        Q1                Q2
251.6         2.8079e+04        2.8079e+04
271.0         4.1437e+04        4.1437e+04
329.0         5.4328e+04        5.4328e+04
387.4         5.8614e+04        5.8614e+04
692.8         2.2689e+04        2.2689e+04
705.5         2.8442e+04        2.8442e+04
1127.2        1.8216e+04        1.8216e+04
1242.0        1.8455e+04        1.8455e+04
1317.8        2.3628e+04        2.3628e+04
1800.6        2.2896e+04        2.2896e+04
2124.2        1.8450e+04        1.8450e+04
2797.7        1.0904e+04        1.0904e+04
2841.8        1.4721e+04        1.4721e+04
2921.4        1.0612e+04        1.0612e+04
2959.8        1.0875e+04        1.0875e+04
3700.7        1.1009e+04        1.1009e+04
3705.3        1.0344e+04        1.0344e+04
3839.3        1.3205e+04        1.3205e+04
4110.4        1.3077e+04        1.3077e+04
4692.3        4.8605e+04        4.8605e+04

 

 

 

Attachment 5: results_2016_11_29a.png
results_2016_11_29a.png
Attachment 9: results_2016_11_29b.png
results_2016_11_29b.png
  214   Tue Nov 29 11:26:46 2016 GabrieleGeneralMeasurementsMIT sample 2 (disk with 4 1"/0.1mm glued blanks)

2016-11-19

  • 11:24am, in chamber, balanced. Installed with the four glued blanks facing down
  • 11:25am, roughing pump on
  • 11:35am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1164492579
      Excitation (broad band) at 1164492611 (60 s) NOTE:stopped short of planned end time
      Quiet time after excitation: 1164492673

  • ~2:40pm, Roughing pump off

    • Quiet time before excitation: 1164494418
      Excitation (broad band) at 1164494450 (60 s)
      Quiet time after excitation: 1164494512

  • Reduced excitation amplitude by a factor 2

    • Quiet time before excitation: 1164496302
      Excitation (broad band) at 1164496334 (60 s)
      Quiet time after excitation: 1164496396

  • Increased excitation back to original value

    • Quiet time before excitation: 1164497423
      Excitation (broad band) at 1164497455 (60 s)
      Quiet time after excitation: 1164497517

    • Quiet time before excitation: 1164498267
      Excitation (broad band) at 1164498300 (60 s)
      Quiet time after excitation: 1164498362

    • Quiet time before excitation: 1164499112
      Excitation (broad band) at 1164499144 (60 s)
      Quiet time after excitation: 1164499206

  • 4:01pm, turbo pump off

Results

2016-11-28 B

% Freq       Q1                Q2
329.0        8.4824e+04        8.4824e+04
335.7        1.4025e+05        1.4025e+05
440.4        9.8646e+03        9.8646e+03
497.0        9.0449e+03        9.0449e+03
776.2        9.3536e+04        9.3536e+04
1112.1        7.1969e+03        7.1969e+03
1350.2        8.7756e+04        8.7756e+04
1358.5        7.4121e+04        7.4121e+04
1552.4        1.8858e+04        1.8858e+04
1609.0        3.3215e+04        3.3215e+04
1784.0        1.1629e+04        1.1629e+04
1798.6        2.0767e+04        2.0767e+04
1888.4        1.7837e+04        1.7837e+04
1945.0        3.3859e+04        3.3859e+04
2030.0        1.0957e+04        1.0957e+04
2050.5        7.5373e+04        7.5373e+04
2080.0        8.8890e+04        8.8890e+04
2134.5        1.1641e+04        1.1641e+04
2416.0        2.1993e+04        2.1993e+04
2470.5        2.7733e+04        2.7733e+04
2520.0        2.2354e+04        2.2354e+04
2527.0        4.5688e+04        4.5688e+04
2856.0        2.0405e+04        2.0405e+04
2874.4        5.1657e+04        5.1657e+04
3192.0        4.0038e+04        4.0038e+04
3438.0        2.4531e+04        2.4531e+04
3528.0        4.3625e+04        4.3625e+04
3810.3        8.4299e+04        8.4299e+04
3812.7        8.4331e+04        8.4331e+04
4214.0        4.5810e+04        4.5810e+04
4379.8        1.2693e+05        1.2693e+05
4550.5        4.2404e+04        4.2404e+04
4867.4        8.2873e+04        8.2873e+04
4870.5        7.8134e+04        7.8134e+04

 

2016-11-28 D

% Freq        Q1                Q2
335.6         1.4056e+05        1.4056e+05
672.0         1.5677e+05        1.5677e+05
777.6         9.2059e+04        9.2059e+04
1112.7        1.0553e+05        1.0553e+05
1203.1        5.5487e+04        5.5487e+04
1350.1        8.4536e+04        8.4536e+04
1358.4        7.1777e+04        7.1777e+04
1714.6        7.2616e+04        7.2616e+04
2050.5        7.6493e+04        7.6493e+04
2080.0        8.7699e+04        8.7699e+04
2098.0        9.7959e+04        9.7959e+04
2416.0        1.0540e+05        1.0540e+05
2874.4        5.6525e+04        5.6525e+04
3128.9        2.3520e+04        2.3520e+04
3134.3        2.0219e+04        2.0219e+04
3810.5        8.7060e+04        8.7060e+04
3812.5        8.7089e+04        8.7089e+04
4323.4        5.2924e+04        5.2924e+04
4379.8        1.2308e+05        1.2308e+05
4867.1        8.1170e+04        8.1170e+04
4870.4        8.9835e+04        8.9835e+04
5704.3        6.9120e+04        6.9120e+04
5728.4        6.6924e+04        6.6924e+04
6033.9        7.5637e+04        7.5637e+04
6036.0        8.0112e+04        8.0112e+04
7204.0        1.0233e+05        1.0233e+05
8625.9        1.4731e+05        1.4731e+05

 

Attachment 2: 2016-11-29_11.17.13.jpg
2016-11-29_11.17.13.jpg
Attachment 6: results_2016_11_28b.png
results_2016_11_28b.png
Attachment 10: results_2016_11_28d.png
results_2016_11_28d.png
  213   Mon Nov 28 16:02:16 2016 GabrieleGeneralGeneralExpected frequencies for the MIT samples
Disk 3 x 1"/0.1mm 4 x 1"/0.1mm 4 x 1"/0.125"
306 319 322 243
306 319 324 319
464 480 487 447
703 739 751 679
703 743 751 679
1082 1140 1163 1101
1082 1140 1163 1101
1225 1288 1306 1211
1225 1288 1314 1283
1869 1941 1985 1750
1869 1941 1985 1904
1883 2003 2011 1904
1883 2003 2032 2017
2034 2155 2203 2065
2633 2731 2783 2759
2633 2745 2783 2784
2843 2986 3029 2877
2843 3006 3029 2877
3176 3325 3394 3307
3176 3325 3394 3307
3515 3645 3694 3629
3515 3645 3694 3630
3953 4152 4197 3673
3953 4152 4216 4001
4491 4655 4695 4560
4491 4655 4717 4673
4514 4697 4719 4739
4514 4697 4828 5132
4660 4814 4896 5301
5205 5463 5538 5302
5205 5463 5538 5350
5628 5793 5854 5849
5628 5795 5854 5849
5970 6208 6290 6088
  212   Mon Nov 28 15:06:09 2016 GabrieleGeneralMeasurementsMIT sample 1 (bare disk)

2016-11-28

  • 3:00pm: removed the retaining ring and the alignment pins
  • 3:05pm, 100mm/0.5mm disk installed, balanced
  • 3:06pm, roughing pump on
  • 3:19pm, turbo pump on
  • Excitations:
    • quiet time before 1164414276
      band pass 100-3000 Hz, amplitude 3 x 2 kV, 60 seconds
      quiet time after 1164414439
    • Quiet time before excitation: 1164426582
      Excitation (broad band) at 1164426615 (60 s)
      Quiet time after excitation: 1164426677

    • Quiet time before excitation: 1164437507
      Excitation (broad band) at 1164437539 (60 s)
      Quiet time after excitation: 1164437601

    • Quiet time before excitation: 1164448433
      Excitation (broad band) at 1164448465 (60 s)
      Quiet time after excitation: 1164448527

2016-11-29

  • 10:02am, pumps off

Results

2016-11-28 A

% Freq        Q1                Q2
315.9         2.8096e+06        2.8096e+06
726.7         1.8635e+06        1.8635e+06
1265.9        1.4194e+06        1.4029e+06
1930.4        1.1427e+06        1.1427e+06
1945.3        3.8068e+06        3.8068e+06
2717.9        9.7820e+05        9.6825e+05
2937.1        2.9339e+06        2.8810e+06
3626.4        8.4222e+05        8.4139e+05
4082.7        2.4345e+06        2.3090e+06
4638.8        5.2362e+06        5.1759e+06
4654.2        7.4042e+05        7.4042e+05
5374.9        1.9928e+06        1.9928e+06
5800.3        6.7081e+05        6.6269e+05
6164.3        4.0627e+06        3.8329e+06
6808.9        1.8131e+06        1.7073e+06
7063.0        6.2208e+05        6.2066e+05
7849.1        3.0518e+06        3.0518e+06
8381.5        1.6107e+06        1.6105e+06
10089.4        1.3860e+06        1.3793e+06
10476.0        4.6551e+06        4.6551e+06
12692.5        3.7473e+06        3.7473e+06

2016-11-28 B

% Freq        Q1                Q2
316.2         2.9559e+06        2.9559e+06
726.7         1.9471e+06        1.9471e+06
1265.9        1.4767e+06        1.4596e+06
1324.0        1.7317e+06        1.7317e+06
1930.3        1.1866e+06        1.1826e+06
1945.2        3.8606e+06        3.8606e+06
2247.0        1.2821e+06        1.2442e+06
2717.8        1.0111e+06        9.8894e+05
2936.9        2.9926e+06        2.9494e+06
3626.2        8.6881e+05        8.6809e+05
4082.4        2.4804e+06        2.3513e+06
4638.7        5.2732e+06        5.1865e+06
4654.1        7.6228e+05        7.6228e+05
5374.6        2.0240e+06        2.0240e+06
5800.0        6.8894e+05        6.7200e+05
6164.1        3.9378e+06        3.9270e+06
6808.7        1.8616e+06        1.7343e+06
7062.7        6.2617e+05        6.2617e+05
7849.0        3.1323e+06        3.1323e+06
8381.2        1.6487e+06        1.5110e+06
8419.4        6.2761e+06        6.0088e+06
9687.4        2.6263e+06        2.6263e+06
10088.7        1.4209e+06        1.4209e+06
10475.5        4.5819e+06        3.9452e+06
11929.4        2.0706e+06        8.4521e+05
13900.0        1.1087e+06        1.1087e+06

2016-11-29 C

% Freq        Q1                Q2
316.1         3.0133e+06        3.0133e+06
726.7         1.9621e+06        1.9621e+06
1265.8        1.4754e+06        1.4754e+06
1324.0        1.5486e+06        1.5486e+06
1930.3        1.1968e+06        1.1968e+06
1945.2        3.8326e+06        3.8326e+06
2717.8        1.0236e+06        9.9498e+05
2937.0        3.0102e+06        2.9815e+06
3626.2        8.7624e+05        8.7624e+05
4082.3        2.4965e+06        2.3709e+06
4638.6        5.2551e+06        5.2551e+06
4654.0        7.6848e+05        7.6176e+05
5374.4        2.0713e+06        2.0713e+06
6164.0        4.6657e+06        4.6657e+06
6808.7        1.8860e+06        1.7018e+06
8381.1        1.6553e+06        1.6553e+06
8419.0        6.3696e+06        6.3696e+06

 

 

 

  211   Mon Nov 28 10:35:54 2016 GabrieleGeneralMeasurementsS1600484

2016-11-28

  • 10:25am, optical setup realigned to horizontal reference
  • 10:35am, in chamber, balanced
  • 10:40am, roughing pump on
  • 10:52am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1164400002
      Excitation (broad band) at 1164400035 (60 s)
      Quiet time after excitation: 1164400097

    • Quiet time before excitation: 1164401563
      Excitation (broad band) at 1164401595 (60 s)
      Quiet time after excitation: 1164401657

  • 2:22pm, pumps off

 

Results​

2016-11-28 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1108.2        2.1286e+06        2.1260e+06        2.1311e+06
1128.2        1.4002e+06        1.3985e+06        1.4019e+06
2541.1        4.4285e+05        4.4093e+05        4.4478e+05
4425.7        1.0825e+06        1.0822e+06        1.0827e+06
4491.8        1.7184e+05        1.7171e+05        1.7197e+05
6751.2        7.5249e+05        7.5201e+05        7.5298e+05
6767.2        9.1922e+06        9.1856e+06        9.1989e+06
6828.1        7.0851e+05        7.0832e+05        7.0870e+05
6892.4        9.0766e+04        8.9716e+04        9.1840e+04
9508.3        6.6234e+05        6.6198e+05        6.6269e+05
10200.6        2.6975e+06        2.6967e+06        2.6982e+06
10354.1        1.3746e+06        1.3722e+06        1.3771e+06
12687.9        5.2322e+05        5.2266e+05        5.2378e+05
12814.7        2.1385e+05        2.0733e+05        2.2078e+05
14162.0        2.4004e+06        2.3937e+06        2.4071e+06
16066.5        8.3368e+05        8.2756e+05        8.3989e+05
16080.9        4.6121e+06        4.6067e+06        4.6174e+06
16292.8        4.4889e+05        4.4768e+05        4.5011e+05
18623.2        1.1736e+06        1.1720e+06        1.1753e+06
20216.5        3.1139e+05        3.0998e+05        3.1281e+05
20269.5        3.9574e+05        3.9231e+05        3.9923e+05
21341.7        3.5609e+06        3.5503e+06        3.5716e+06
23548.5        1.0547e+06        1.0459e+06        1.0636e+06
24675.0        4.8722e+05        4.8369e+05        4.9081e+05
27114.5        3.2593e+06        3.2316e+06        3.2876e+06
28847.0        6.4298e+05        6.3580e+05        6.5031e+05
29042.8        9.0053e+06        8.9598e+06        9.0514e+06
29541.5        3.0418e+05        3.0008e+05        3.0840e+05

2016-11-28 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1108.0        2.2446e+06        2.2430e+06        2.2461e+06
1128.0        1.4273e+06        1.4259e+06        1.4287e+06
2541.1        5.5421e+05        5.5231e+05        5.5613e+05
4425.7        1.1296e+06        1.1292e+06        1.1300e+06
4491.7        1.7340e+05        1.7315e+05        1.7364e+05
6751.2        7.9555e+05        7.9513e+05        7.9598e+05
6828.1        7.2886e+05        7.2829e+05        7.2944e+05
6892.3        9.0531e+04        8.9920e+04        9.1150e+04
9508.4        6.8801e+05        6.8618e+05        6.8985e+05
10200.6        2.8353e+06        2.8293e+06        2.8413e+06
10354.2        1.3806e+06        1.3748e+06        1.3865e+06
12687.9        5.4251e+05        5.4151e+05        5.4351e+05
14162.1        2.5067e+06        2.5040e+06        2.5094e+06
16066.6        8.5525e+05        8.5256e+05        8.5796e+05
16081.0        4.7931e+06        4.7882e+06        4.7979e+06
16292.8        4.7076e+05        4.7014e+05        4.7138e+05
18623.3        1.1982e+06        1.1952e+06        1.2012e+06
20216.7        3.2637e+05        3.2410e+05        3.2868e+05
20270.0        4.0768e+05        4.0103e+05        4.1455e+05
21341.9        3.7598e+06        3.7510e+06        3.7686e+06
24675.0        4.9703e+05        4.9246e+05        5.0169e+05
27115.0        3.3173e+06        3.2448e+06        3.3930e+06
28846.8        6.8259e+05        6.7698e+05        6.8830e+05
29043.0        9.1345e+06        9.1187e+06        9.1503e+06
29541.6        3.1186e+05        3.0790e+05        3.1591e+05
32140.0        2.7203e+06        2.6578e+06        2.7857e+06

 

 

  210   Wed Nov 23 14:16:59 2016 AlenaGeneralGeneralMicroscope inspection

Microscope inspection of samples:

S1600487  https://dcc.ligo.org/S1600487-v7

S1600438 https://dcc.ligo.org/S1600438

 

 

  209   Wed Nov 23 08:55:41 2016 GabrieleGeneralNoise hunting"Advanced" vibration isolation

In normal conditions the RMS of the QPD signals is dominated by the 58 Hz line generated by the roughing pump. Also, when the modes are excited, they exhibit large sidebands at +- 58 Hz that are an annoyance for the analysis.

I improved a bit the level of the 58 Hz in the QPD signals by putting the roughing pump on top of a "Very Useful Box":

Despite the fact that this advanced vibration isolation is already a little bit effective, it might be good to try to build some better suspension and maybe add an acoustic isolation around the pump.

  208   Tue Nov 22 14:11:38 2016 GabrieleGeneralMeasurementsLaser polishing of bad disk improves Q, but they're still not very good

Laser polishing of a sample from the second batch (S1600487, bad Q as out of the box) improves the Q values, but they're still lower than what we got with a good sample (S1600439, first batch)

Attachment 1: polishing_Qs.png
polishing_Qs.png
  207   Tue Nov 22 08:21:35 2016 GabrieleElectronicsCharacterizationADC saturation

Last night measurements didn't work well: even without exciting the modes, the ADC was saturating because of the low frequency signal, particularly a 58 Hz peak:

When the modes were rang up, thing got clearly even worse:

Modification of whitening filter

So I modified the whitening filter, changing C6 from 2.2u to 220nF. The old and new whitening filters are shown below. We have the same amount of whitening at high frequency, but less amplification of the junk at ~50-100 Hz

With this modification, there's no more saturation, even when the modes are excited.

Attachment 1: saturation_1.png
saturation_1.png
Attachment 2: saturation_2.png
saturation_2.png
  206   Mon Nov 21 16:37:01 2016 GabrieleGeneralMeasurementsS1600487 post polishing

2016-11-21

  • 4:34pm, in chamber, balanced
  • 4:35pm, roughing pump on
  • 4:45pm, turbo pump on
  • Excitations
    • Quiet time before excitation: 1163826122
      Excitation (1100 Hz) at 1163826154 (60 s)
      Excitation (broad band) at 1163826216 (60 s)
      Quiet time after excitation: 1163826278

    • Quiet time before excitation: 1163840708
      Excitation (1100 Hz) at 1163840740 (60 s)
      Excitation (broad band) at 1163840803 (60 s)
      Quiet time after excitation: 1163840865

    • Quiet time before excitation: 1163855295
      Excitation (1100 Hz) at 1163855328 (60 s)
      Excitation (broad band) at 1163855391 (60 s)
      Quiet time after excitation: 1163855453

 

2016-11-22

  • Excitations
    • Quiet time before excitation: 1163873594
      Excitation (1100 Hz) at 1163873626 (60 s)
      Excitation (broad band) at 1163873688 (60 s)
      Quiet time after excitation: 1163873750

    • Quiet time before excitation: 1163880980
      Excitation (1100 Hz) at 1163881012 (60 s)
      Excitation (broad band) at 1163881075 (60 s)
      Quiet time after excitation: 1163881137

  • 2:55pm pumps off

Results

2016-11-22 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1070.1        1.9388e+06        1.9315e+06        1.9462e+06
2531.5        1.3892e+07        1.3883e+07        1.3900e+07
2569.8        5.3460e+05        5.3416e+05        5.3504e+05
4398.1        5.0525e+06        5.0514e+06        5.0536e+06
6668.6        1.0221e+07        1.0215e+07        1.0226e+07
6698.2        9.2235e+06        9.2214e+06        9.2255e+06
6765.6        2.1925e+06        2.1912e+06        2.1937e+06
6793.6        1.3792e+05        1.3779e+05        1.3805e+05
9423.3        1.1806e+07        1.1804e+07        1.1808e+07
10062.8        6.9247e+06        6.9231e+06        6.9263e+06
10211.2        1.6982e+06        1.6970e+06        1.6994e+06
11431.5        9.9092e+04        9.8081e+04        1.0012e+05
12563.6        6.3580e+06        6.3337e+06        6.3826e+06
12675.7        3.0024e+05        2.9935e+05        3.0113e+05
13979.2        3.2738e+06        3.2702e+06        3.2773e+06
15862.0        1.0955e+07        1.0911e+07        1.1000e+07
15880.4        9.6743e+06        9.6714e+06        9.6772e+06
16118.9        7.7139e+06        7.7110e+06        7.7168e+06
18553.9        1.1010e+06        1.0951e+06        1.1070e+06
20323.0        2.9024e+06        2.8472e+06        2.9598e+06
21057.3        7.9677e+06        7.9231e+06        8.0129e+06
23260.9        6.3371e+06        6.3239e+06        6.3504e+06
24388.9        6.7833e+06        6.7652e+06        6.8014e+06
24763.0        3.1798e+06        3.1575e+06        3.2026e+06
26153.1        2.9557e+06        2.9440e+06        2.9676e+06
26167.4        4.4583e+06        4.4341e+06        4.4828e+06
26762.0        7.5887e+06        7.4226e+06        7.7623e+06
28598.1        6.4998e+06        6.4935e+06        6.5061e+06
29164.0        3.7171e+05        3.6012e+05        3.8407e+05
29985.5        6.7660e+06        6.7237e+06        6.8089e+06
30887.9        4.2386e+06        4.1974e+06        4.2807e+06
31630.0        2.9121e+06        2.9023e+06        2.9220e+06
31660.0        7.7734e+06        7.7553e+06        7.7916e+06
32320.0        2.5640e+06        2.4872e+06        2.6458e+06

2016-11-22 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1070.0        2.0387e+06        2.0263e+06        2.0513e+06
2531.4        1.3095e+07        1.3084e+07        1.3107e+07
2569.9        5.4137e+05        5.4076e+05        5.4198e+05
2596.0        6.0664e+04        5.0205e+04        7.6618e+04
3270.0        2.3507e+06        2.2920e+06        2.4124e+06
3364.4        1.5727e+07        1.5284e+07        1.6197e+07
3640.4        1.2485e+07        1.1993e+07        1.3020e+07
4398.1        4.9792e+06        4.9778e+06        4.9807e+06
5230.7        5.8211e+06        5.6113e+06        6.0471e+06
5506.9        5.5310e+06        5.2327e+06        5.8654e+06
6668.9        1.0132e+07        1.0124e+07        1.0141e+07
6698.2        9.2026e+06        9.1993e+06        9.2059e+06
6765.6        2.1984e+06        2.1972e+06        2.1996e+06
6793.5        1.3816e+05        1.3724e+05        1.3910e+05
9423.3        1.1839e+07        1.1836e+07        1.1842e+07
10062.8        6.9932e+06        6.9775e+06        7.0089e+06
10211.3        1.8418e+06        1.7438e+06        1.9514e+06
11431.5        1.0026e+05        9.9033e+04        1.0151e+05
12563.7        6.2767e+06        6.2281e+06        6.3261e+06
12675.8        3.0511e+05        3.0130e+05        3.0901e+05
13979.3        3.2395e+06        3.2354e+06        3.2436e+06
15862.1        1.1013e+07        1.0999e+07        1.1027e+07
15880.5        9.7162e+06        9.7120e+06        9.7204e+06
16119.0        7.7387e+06        7.7348e+06        7.7427e+06
18553.9        1.1033e+06        1.0932e+06        1.1135e+06
20044.6        5.8909e+05        5.7146e+05        6.0784e+05
20322.7        2.9553e+06        2.9055e+06        3.0069e+06
21057.2        8.0593e+06        8.0366e+06        8.0822e+06
23261.1        6.4567e+06        6.4296e+06        6.4841e+06
24389.0        6.8069e+06        6.7931e+06        6.8209e+06
24762.4        3.1729e+06        3.1563e+06        3.1895e+06
26152.9        3.0129e+06        2.9516e+06        3.0767e+06
26762.4        7.5311e+06        7.4757e+06        7.5873e+06
28598.3        6.5290e+06        6.4709e+06        6.5881e+06
28658.3        9.6595e+06        9.5903e+06        9.7297e+06
29985.3        6.5466e+06        6.5024e+06        6.5914e+06
30887.8        4.2070e+06        4.1757e+06        4.2387e+06
31630.0        2.9536e+06        2.9435e+06        2.9638e+06
31659.7        7.7449e+06        7.7254e+06        7.7644e+06

 

Attachment 1: spectra.png
spectra.png
  205   Mon Nov 21 16:21:12 2016 Gabriele, AlastairGeneralGeneralLaser polishing of S1600487

The sample has been laser polished this afternoon, 0.5mm/s, average power 23 W.

We moved the lens that focuses the beam about one inch toward the sample, to make the beam slightly larger.

  204   Mon Nov 21 11:46:57 2016 GabrieleGeneralGeneralMicroscope inspection of 439 and 487

S1600439

This is the sample that was CO2 polished (198) and measured after polishing (197, 199). Unfortunately it got damaged during annealing:

I looked at the edge under the microscope. The first image is taken with light from above, and it shows a bit of residual defects in the center of the edge:

The images below are taken with light from below (which seems always the best choice) and they show some residual defects on the edge. Also, there is some "stuff" on the borders, like some fibers of some contamination. The first image is taken in correspondence of the damage, which is barely visible on the left edge. No clean problem is visible here.

S1600487

This is a sample as received from Mark Optics. I will measure its Q values, laser polish it, measure again and then anneal it. Here are some images of the edges for future reference. The last one in particular shows the transition from the round part to the flats. The surface quality is clearly different.

  203   Mon Nov 21 11:05:51 2016 GabrieleGeneralMeasurementsS1600487

Note: not annealed

2016-11-21

  • 11:04am in chamber, balanced
  • 11:05am roughing pump on
  • 11:15am turbo pump on
  • 12:49pm, excitation (2kV, 60 s), quiet time before: 1163796504, quiet time after 1163796645 
  • 1:44pm, excitation (2kV, 60s), quiet time before 1163799861, quiet time after 1163799969
  • 2:35pm pumps off

Sample has been laser polished by Alastair and Gabriele.

Results

2016-11-21 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1092.0        2.0996e+06        2.0980e+06        2.1013e+06
2505.5        3.7980e+05        3.7943e+05        3.8017e+05
2544.1        1.9755e+04        1.9274e+04        2.0261e+04
4364.5        8.9303e+05        8.9272e+05        8.9334e+05
4426.6        2.0585e+05        2.0551e+05        2.0619e+05
6658.1        7.3829e+05        7.3655e+05        7.4004e+05
6673.2        3.5144e+06        3.4646e+06        3.5657e+06
6729.6        7.3540e+05        7.3412e+05        7.3668e+05
6791.9        1.4926e+05        1.4783e+05        1.5072e+05
9378.0        6.2587e+05        6.2453e+05        6.2722e+05
10060.0        1.8195e+06        1.8128e+06        1.8263e+06
10206.0        8.1387e+05        8.0392e+05        8.2406e+05
12514.4        5.1323e+05        5.0504e+05        5.2168e+05
15851.5        7.7288e+05        7.7105e+05        7.7471e+05
16069.0        5.1586e+05        5.0878e+05        5.2313e+05
21045.5        3.0229e+06        3.0036e+06        3.0425e+06
28565.0        5.7365e+05        5.3858e+05        6.1362e+05
30008.1        3.8168e+06        3.7090e+06        3.9310e+06
32597.0        1.2310e+06        1.1514e+06        1.3224e+06

2016-11-21 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1092.1        2.1370e+06        2.1351e+06        2.1389e+06
1110.8        1.2884e+06        1.2787e+06        1.2982e+06
2505.6        4.6204e+05        4.5453e+05        4.6981e+05
4364.6        9.0907e+05        9.0847e+05        9.0967e+05
4426.5        2.1117e+05        2.0306e+05        2.1996e+05
6658.2        7.3579e+05        7.3277e+05        7.3883e+05
6673.3        3.4406e+06        3.4108e+06        3.4709e+06
6729.6        7.3685e+05        7.3540e+05        7.3830e+05
6791.7        1.4679e+05        1.3208e+05        1.6520e+05
9377.9        6.4036e+05        6.2873e+05        6.5242e+05
10059.9        1.7966e+06        1.7905e+06        1.8028e+06
12514.4        6.2867e+05        3.7657e+05        1.9017e+06
15851.4        7.7502e+05        7.7177e+05        7.7829e+05
16068.5        5.2815e+05        5.0732e+05        5.5076e+05
21045.5        3.1520e+06        3.0746e+06        3.2334e+06
30008.2        3.6847e+06        3.6042e+06        3.7689e+06

 

 

 

  202   Sun Nov 20 14:40:14 2016 GabrieleGeneralMeasurementsS1600482

Note: marked as "scratched" by Alena

2016-11-20

  • 2:38pm, in chamber, balanced
  • 2:39pm roughing pump on
  • 2:50pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1163731955
      Excitation (1100 Hz) at 1163731988 (60 s)
      Excitation (broad band) at 1163732051 (60 s)
      Quiet time after excitation: 1163732113

    • Quiet time before excitation: 1163746543
      Excitation (1100 Hz) at 1163746575 (60 s)
      Excitation (broad band) at 1163746637 (60 s)
      Quiet time after excitation: 1163746699

    • Quiet time before excitation: 1163761129
      Excitation (1100 Hz) at 1163761161 (60 s)
      Excitation (broad band) at 1163761223 (60 s)
      Quiet time after excitation: 1163761285

2016-11-21

  • ~8:50am Pumps off when the electricians switched off the power (to fix flooding in another lab).

Results

2016-11-20 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1105.6        1.3699e+07        1.3679e+07        1.3719e+07
1129.5        1.2592e+06        1.2582e+06        1.2602e+06
2536.9        6.9108e+06        6.9091e+06        6.9125e+06
2582.0        1.0950e+06        1.0945e+06        1.0954e+06
4419.5        4.6415e+06        4.6408e+06        4.6422e+06
6741.0        4.6109e+06        4.6085e+06        4.6133e+06
6751.5        7.3558e+06        7.3545e+06        7.3572e+06
6760.0        9.3303e+05        9.1696e+05        9.4966e+05
6817.9        8.8863e+05        8.8845e+05        8.8881e+05
6876.4        9.0884e+05        8.9493e+05        9.2320e+05
9501.3        2.1618e+06        2.1613e+06        2.1622e+06
10176.4        1.0854e+07        1.0851e+07        1.0857e+07
12682.4        2.2503e+06        2.2480e+06        2.2527e+06
14133.9        7.2804e+06        7.2779e+06        7.2829e+06
16033.5        5.5906e+06        5.5589e+06        5.6227e+06
16293.6        2.0220e+06        2.0213e+06        2.0226e+06
18591.1        5.6667e+06        5.6569e+06        5.6766e+06
20188.1        5.3541e+05        5.3539e+05        5.3542e+05
20260.5        1.2546e+06        1.2487e+06        1.2607e+06
21301.6        8.9899e+06        8.9852e+06        8.9945e+06
23507.9        6.7449e+06        6.7090e+06        6.7812e+06
23665.4        4.2237e+05        4.2236e+05        4.2237e+05
24674.0        1.7576e+06        1.7419e+06        1.7736e+06
27071.8        1.0639e+07        1.0601e+07        1.0679e+07
28778.0        4.4868e+06        4.4779e+06        4.4957e+06
28875.5        3.2816e+06        3.2506e+06        3.3131e+06
28971.4        1.3371e+07        1.3319e+07        1.3422e+07
29588.4        6.4932e+06        6.4563e+06        6.5304e+06
31309.6        1.3159e+06        1.3159e+06        1.3159e+06
32182.4        4.1484e+06        4.0890e+06        4.2095e+06

2016-11-20 B

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1106.0        1.3735e+07        1.3705e+07        1.3765e+07
1129.4        1.3461e+06        1.3447e+06        1.3475e+06
2536.9        6.9208e+06        6.9190e+06        6.9225e+06
2581.9        1.1022e+06        1.1018e+06        1.1027e+06
4419.5        4.6410e+06        4.6403e+06        4.6417e+06
6741.0        4.5896e+06        4.5529e+06        4.6269e+06
6751.5        7.3617e+06        7.3515e+06        7.3719e+06
6817.9        8.8718e+05        8.8685e+05        8.8752e+05
9501.3        2.0661e+06        2.0623e+06        2.0699e+06
10176.5        1.0802e+07        1.0799e+07        1.0806e+07
12682.5        2.2575e+06        2.2491e+06        2.2659e+06
14134.0        7.4453e+06        7.4405e+06        7.4502e+06
16032.3        3.4372e+06        3.4136e+06        3.4611e+06
16293.6        2.0186e+06        2.0172e+06        2.0200e+06
18591.1        5.5027e+06        5.4999e+06        5.5054e+06
20188.4        5.3252e+05        5.3251e+05        5.3254e+05
20260.5        1.2588e+06        1.2465e+06        1.2713e+06
21301.7        9.0170e+06        9.0118e+06        9.0222e+06
23507.9        6.6291e+06        6.6017e+06        6.6567e+06
23665.4        4.4613e+05        4.4612e+05        4.4614e+05
24220.0        1.9037e+06        1.9037e+06        1.9037e+06
24674.0        1.7636e+06        1.7466e+06        1.7809e+06
27071.8        1.0771e+07        1.0668e+07        1.0875e+07
28778.1        4.5042e+06        4.4886e+06        4.5200e+06
28875.5        3.3774e+06        3.3375e+06        3.4182e+06
28971.5        1.2966e+07        1.2933e+07        1.2999e+07
29588.4        6.3389e+06        6.2527e+06        6.4275e+06
31310.0        1.3706e+06        1.3706e+06        1.3706e+06
32182.1        4.6113e+06        4.5490e+06        4.6755e+06

 

 

Attachment 3: ringdowns.png
ringdowns.png
  201   Fri Nov 18 15:48:09 2016 GabrieleGeneralMeasurementsMicroscope inspection of CO2 polished samples

S1600470

For reference, this sample has not been CO2 polished, but it has been annealed and measured. It has quite low Q values. Here are some images of the edges. The first two are taken with light from above. In the second one there some clear red residual, which is also visible as a coloration with the naked eye. The microroughness and some larger defect are well visible.

The following images instead are taken with light from below. The red residual is even more evident, and some traces probably due to the machining are clearly visible.

S1600479

This sample has been laser polished with a double pass (first at 0.5 mm/s, second at 0.25 mm/s). The first two images are taken with light from above: they are not very clear because of the specular reflection of the lamps. This already indicates that the surface is much smoother. Some defects (bubbles?) are visible close to the main surfaces.

The surface quality is more apparent in the following pictures, taken with light from below. The second one is taken where there is a chip in the main surface, and indeed one can see the shading due to the light distortion iduced by the chip. Also a cluster of "bubbles" is clearly visible there.

S1600462

This was our first polishing test. It is interesting because the laser tripped during the procedure, so we have a neat transition from the original surface to the polished one. First image taken with light from above, second with light from below

Attachment 9: S1600462_3.png
S1600462_3.png
  200   Fri Nov 18 11:39:59 2016 GabrieleGeneralMeasurementsS1600480

Note: marked at "D?" by Alena

2016-11-18

  • 11:38am, in chamber, balanced
  • 11:39am, roughing pump on
  • 11:51am, turbo pump on
  • 3:54pm, excitation (3kV), quiet time before 1163547289, quiet time after 1163548497
  • Automated excitations:
    • Quiet time before excitation: 1163563312
      Excitation (1100 Hz) at 1163563344 (60 s)
      Excitation (broad band) at 1163563406 (60 s)
      Quiet time after excitation: 1163563468

    • Quiet time before excitation: 1163577898
      Excitation (1100 Hz) at 1163577931 (60 s)
      Excitation (broad band) at 1163577993 (60 s)
      Quiet time after excitation: 1163578055

    • Quiet time before excitation: 1163592485
      Excitation (1100 Hz) at 1163592517 (60 s)
      Excitation (broad band) at 1163592579 (60 s)
      Quiet time after excitation: 1163592641

2016-11-20

  • 2:05pm pumps off

Results

2016-11-18 A

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1104.1        1.0173e+07        1.0152e+07        1.0195e+07
1124.3        8.2131e+05        8.1929e+05        8.2333e+05
2532.6        5.0306e+06        5.0249e+06        5.0363e+06
2573.3        1.3847e+06        1.3808e+06        1.3886e+06
4411.2        2.8588e+06        2.8563e+06        2.8613e+06
4476.9        2.0843e+05        2.0731e+05        2.0956e+05
6729.4        2.6143e+06        2.6132e+06        2.6155e+06
6747.8        1.2395e+07        1.2374e+07        1.2417e+07
6806.2        2.1725e+06        2.1449e+06        2.2008e+06
6873.5        1.4735e+05        1.4563e+05        1.4911e+05
9478.1        2.0101e+06        2.0082e+06        2.0120e+06
10171.9        9.4754e+06        9.4682e+06        9.4827e+06
10325.5        2.9800e+06        2.9785e+06        2.9815e+06
12648.0        1.7468e+06        1.7413e+06        1.7524e+06
12773.7        5.3335e+05        5.2619e+05        5.4072e+05
14123.2        7.1655e+06        7.1632e+06        7.1678e+06
16018.0        2.2296e+06        2.2274e+06        2.2319e+06
16033.8        6.7662e+06        6.7549e+06        6.7775e+06
16242.7        1.5742e+06        1.5712e+06        1.5773e+06
17697.8        1.1028e+06        1.0837e+06        1.1227e+06
18281.0        1.5366e+06        1.5366e+06        1.5366e+06
18573.5        4.3588e+05        4.3587e+05        4.3589e+05
18745.4        3.4263e+05        3.4262e+05        3.4264e+05
20032.7        3.3234e+05        3.3233e+05        3.3235e+05
20150.9        1.1528e+06        1.1528e+06        1.1529e+06
20206.1        1.2661e+06        1.2631e+06        1.2691e+06
21282.5        1.0456e+07        1.0450e+07        1.0462e+07
21568.7        5.5263e+05        5.4626e+05        5.5915e+05
22166.5        2.8542e+06        2.8541e+06        2.8542e+06
23484.9        5.0281e+06        5.0189e+06        5.0374e+06
23636.0        4.3875e+05        4.3874e+05        4.3876e+05
24559.0        1.9874e+05        1.9873e+05        1.9874e+05
24598.4        1.3312e+06        1.2994e+06        1.3647e+06
25479.2        4.4672e+06        4.3821e+06        4.5558e+06
27041.0        4.9796e+06        4.9564e+06        5.0031e+06
28764.5        2.2975e+06        2.2895e+06        2.3055e+06
28862.1        2.7554e+06        2.7260e+06        2.7855e+06
29272.0        7.3791e+05        7.3790e+05        7.3792e+05
29453.0        3.7211e+05        3.7211e+05        3.7212e+05
29617.4        5.4367e+06        5.3598e+06        5.5159e+06
30529.7        1.9682e+06        1.9682e+06        1.9683e+06
31344.8        9.4048e+05        9.4047e+05        9.4050e+05
31970.0        4.2696e+06        4.2435e+06        4.2960e+06
32227.0        6.7855e+06        6.7854e+06        6.7856e+06

2016-11-18 B



% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1104.0        1.0297e+07        1.0284e+07        1.0311e+07
1124.4        1.1668e+06        1.1652e+06        1.1684e+06
2532.6        5.0152e+06        5.0134e+06        5.0170e+06
2573.3        1.4606e+06        1.4576e+06        1.4637e+06
4411.3        3.3395e+06        3.3382e+06        3.3409e+06
4477.1        2.0944e+05        2.0896e+05        2.0991e+05
6729.7        2.6053e+06        2.6046e+06        2.6061e+06
6748.2        1.2388e+07        1.2379e+07        1.2398e+07
6806.5        2.1415e+06        2.1369e+06        2.1461e+06
6873.8        1.4706e+05        1.4619e+05        1.4794e+05
9478.4        2.0036e+06        2.0025e+06        2.0046e+06
10172.5        9.4094e+06        9.3186e+06        9.5020e+06
10326.0        2.9820e+06        2.9804e+06        2.9836e+06
12648.4        1.7268e+06        1.7241e+06        1.7295e+06
12774.1        4.9106e+05        4.7983e+05        5.0283e+05
14123.6        3.1322e+06        3.1310e+06        3.1335e+06
16018.6        2.2761e+06        2.2742e+06        2.2780e+06
16034.5        8.0306e+06        8.0250e+06        8.0361e+06
16243.3        1.5954e+06        1.5909e+06        1.5998e+06
18574.2        3.3307e+06        3.3155e+06        3.3460e+06
18746.1        9.1765e+05        9.1638e+05        9.1892e+05
20151.5        1.0945e+06        1.0635e+06        1.1273e+06
20206.9        1.2644e+06        1.2579e+06        1.2709e+06
21283.4        1.0704e+07        1.0692e+07        1.0717e+07
21569.6        5.5770e+05        5.5558e+05        5.5983e+05
23485.8        5.0910e+06        5.0796e+06        5.1023e+06
24599.2        1.2773e+06        1.2665e+06        1.2883e+06
25477.5        4.3947e+06        4.3268e+06        4.4648e+06
25828.0        7.4575e+05        7.2022e+05        7.7315e+05
27042.2        4.9480e+06        4.9335e+06        4.9625e+06
28765.8        2.2507e+06        2.2298e+06        2.2721e+06
28863.2        2.7105e+06        2.6968e+06        2.7243e+06
28961.6        8.5083e+06        8.4642e+06        8.5529e+06
29615.6        5.4281e+06        5.2865e+06        5.5774e+06
30528.4        1.9676e+06        1.9223e+06        2.0150e+06
31343.4        9.0249e+05        8.8999e+05        9.1536e+05
31968.6        4.2914e+06        4.2817e+06        4.3012e+06

2016-11-18 C

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1104.1        1.0082e+07        1.0063e+07        1.0100e+07
1124.5        1.3397e+06        1.3366e+06        1.3427e+06
2532.8        4.9558e+06        4.9513e+06        4.9604e+06
2573.5        1.4059e+06        1.3996e+06        1.4122e+06
4411.6        3.1148e+06        3.1116e+06        3.1180e+06
4477.4        2.1088e+05        2.1055e+05        2.1121e+05
6730.2        2.5865e+06        2.5850e+06        2.5881e+06
6748.7        1.2747e+07        1.2486e+07        1.3019e+07
6807.0        2.1437e+06        2.1251e+06        2.1626e+06
6874.2        1.5494e+05        1.5375e+05        1.5614e+05
9479.1        2.0187e+06        1.9656e+06        2.0748e+06
10173.2        9.4877e+06        9.4764e+06        9.4990e+06
10326.7        3.0116e+06        3.0106e+06        3.0127e+06
12649.3        1.7115e+06        1.6986e+06        1.7247e+06
14124.9        9.1986e+05        9.1825e+05        9.2148e+05
16019.8        2.2901e+06        2.2890e+06        2.2913e+06
16035.7        8.1365e+06        8.1202e+06        8.1529e+06
16244.6        1.5627e+06        1.5520e+06        1.5735e+06
18575.7        5.0190e+06        5.0085e+06        5.0296e+06
18747.6        2.2873e+06        2.2850e+06        2.2896e+06
20153.0        1.1379e+06        1.1286e+06        1.1474e+06
20208.4        1.2843e+06        1.2797e+06        1.2891e+06
21285.1        1.0850e+07        1.0800e+07        1.0899e+07
23487.6        5.1931e+06        5.1699e+06        5.2165e+06
23638.5        4.6983e+05        4.5937e+05        4.8078e+05
24562.0        2.0605e+05        1.9793e+05        2.1488e+05
25474.4        4.3828e+06        4.2782e+06        4.4926e+06
27044.4        4.4216e+06        4.4140e+06        4.4293e+06
28767.9        2.2400e+06        2.2194e+06        2.2610e+06
28865.5        2.4306e+06        2.3822e+06        2.4810e+06
28963.9        8.4171e+06        8.3301e+06        8.5059e+06
29425.5        1.2180e+06        1.1936e+06        1.2434e+06
30525.7        1.9877e+06        1.9649e+06        2.0110e+06
31340.9        9.0879e+05        8.9734e+05        9.2053e+05
31965.9        4.3188e+06        4.3004e+06        4.3374e+06
32222.9        6.8476e+06        6.7375e+06        6.9614e+06

 

  199   Fri Nov 18 09:27:26 2016 GabrieleGeneralMeasurementsCO2 polishing improves the Q !!

The plot below shows that the Q values of S1600439 improved a lot after the CO2 laser polishing. About 15 modes have Q above 10e6. The first mode at 1kHz has a Q of 37e6, the highest ever measured so far!

Here's a comparison of the Q values of this sample before annealing, after annealing and after CO2 polishing.

  198   Thu Nov 17 17:59:44 2016 Gabriele, AlastairGeneralGeneralCO2 laser polishing tests

We improved the control software of the laser polishing system: now the rotation speed is large when the laser is missing the disk because of the flats.

We used S1600479 as a test. This substrate was marked as damaged and had a clear chip. It went thoruhg two different polishing runs

  • CO2 power ~19.5 W, speed 0.5 mm/s
  • CO2 power ~18.5 W, speed 0.25 mm/s

The second run was probably too slow, and we can see some kind of traces left on the main surface close to the edges

We then laser polished a good subtrate (S1600439) which was already measured before (137) and after annealing (144), with good Q values. This is a substrate from the first batch we received from Mark Optics. The polishing was done at ~ 18W and 0.5 mm/s.

Some pictures below:

  197   Thu Nov 17 17:54:13 2016 GabrieleGeneralMeasurementsS1600439 after CO2 laser polishing

Previous measurments

  • post annealing 144
  • pre annealing 137

2016-11-17

  • 5:52pm, in chamber, balanced
  • 5:53pm, roughing pump on
  • 6:04pm, turbo pump on
  • 6:05pm, air filters off
  • Excitations:
    • Quiet time before excitation: 1163480205
      Excitation (1100 Hz) at 1163480237 (60 s)
      Excitation (broad band) at 1163480299 (60 s)
      Quiet time after excitation: 1163480361

    • Quiet time before excitation: 1163494791
      Excitation (1100 Hz) at 1163494824 (60 s)
      Excitation (broad band) at 1163494886 (60 s)
      Quiet time after excitation: 1163494948

    • Quiet time before excitation: 1163509378
      Excitation (1100 Hz) at 1163509411 (60 s)
      Excitation (broad band) at 1163509473 (60 s)
      Quiet time after excitation: 1163509535

2016-11-18

  • 8:47am, pumps off

Results

2016-11-17 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1127.6        3.7205e+07        3.7099e+07        3.7311e+07
1149.8        5.7351e+05        5.7170e+05        5.7532e+05
2516.5        1.1828e+07        1.1490e+07        1.2186e+07
2574.8        1.3400e+07        1.3395e+07        1.3404e+07
2633.3        1.2628e+07        1.2459e+07        1.2802e+07
4474.7        2.4553e+07        2.4547e+07        2.4559e+07
4544.8        1.8667e+05        1.8641e+05        1.8693e+05
6759.0        1.8704e+07        1.8468e+07        1.8946e+07
6789.3        2.5840e+07        2.5830e+07        2.5850e+07
6817.2        1.9911e+07        1.9909e+07        1.9914e+07
6875.5        1.9155e+07        1.8915e+07        1.9401e+07
6896.6        3.0284e+06        3.0201e+06        3.0366e+06
9593.1        1.3325e+07        1.3319e+07        1.3332e+07
10242.1        1.3837e+07        1.3830e+07        1.3844e+07
10407.9        1.8996e+06        1.8632e+06        1.9374e+06
12793.6        1.1109e+07        1.1108e+07        1.1110e+07
12852.0        1.0545e+07        9.7561e+06        1.1473e+07
16145.3        3.0830e+06        3.0717e+06        3.0943e+06
16157.3        3.1104e+06        3.1087e+06        3.1120e+06
16421.2        9.5753e+05        9.5258e+05        9.6254e+05
18715.3        8.1385e+06        8.1309e+06        8.1461e+06
20416.5        2.5193e+05        2.5192e+05        2.5193e+05
21438.5        1.0088e+07        1.0036e+07        1.0141e+07
21741.0        2.0006e+05        2.0006e+05        2.0007e+05
23667.3        1.4606e+07        1.4548e+07        1.4665e+07
23826.4        2.5707e+05        2.5707e+05        2.5708e+05
23986.1        6.6046e+06        6.5724e+06        6.6371e+06
24849.9        3.1250e+06        3.1187e+06        3.1313e+06
25164.4        8.5725e+06        8.4512e+06        8.6973e+06
25462.9        4.0887e+06        4.0761e+06        4.1014e+06
25483.9        4.1145e+06        4.0637e+06        4.1666e+06
27245.8        1.4814e+07        1.4743e+07        1.4884e+07
28991.0        1.3488e+07        1.3478e+07        1.3497e+07
29095.2        5.2186e+06        5.2043e+06        5.2330e+06
29167.4        1.6466e+07        1.6231e+07        1.6707e+07
29749.1        5.0360e+05        5.0359e+05        5.0361e+05
30206.6        4.2957e+06        4.2020e+06        4.3937e+06
31045.1        3.1095e+06        3.1029e+06        3.1161e+06
31088.9        9.3908e+06        9.3757e+06        9.4060e+06
31710.0        2.4880e+06        2.4880e+06        2.4880e+06
31969.7        1.1411e+07        1.1372e+07        1.1451e+07

2016-11-17 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1127.9        3.7152e+07        3.7077e+07        3.7227e+07
2574.7        1.4429e+07        1.4424e+07        1.4434e+07
2633.0        1.6022e+07        1.4847e+07        1.7399e+07
4474.6        2.4432e+07        2.4419e+07        2.4445e+07
4544.7        1.9919e+05        1.9877e+05        1.9961e+05
6789.2        2.5907e+07        2.5888e+07        2.5927e+07
6817.0        1.9832e+07        1.9829e+07        1.9835e+07
6896.5        2.9655e+06        2.9546e+06        2.9765e+06
9593.0        1.3275e+07        1.3236e+07        1.3313e+07
10242.0        1.3491e+07        1.3479e+07        1.3502e+07
10407.7        1.8960e+06        1.8810e+06        1.9113e+06
12793.4        1.1592e+07        1.1590e+07        1.1594e+07
16144.7        4.6655e+06        4.5884e+06        4.7452e+06
16157.0        3.1237e+06        3.1216e+06        3.1258e+06
16420.9        1.3524e+06        1.3493e+06        1.3555e+06
17291.0        3.3682e+06        3.2925e+06        3.4475e+06
18714.9        8.1669e+06        8.1601e+06        8.1737e+06
20351.4        9.4653e+05        9.4188e+05        9.5123e+05
20416.2        1.1000e+06        1.0988e+06        1.1012e+06
21438.1        8.4404e+06        8.3969e+06        8.4845e+06
23666.9        1.4674e+07        1.4646e+07        1.4703e+07
23825.7        2.6272e+05        2.6271e+05        2.6272e+05
23987.0        5.6799e+06        5.6251e+06        5.7359e+06
24849.4        4.3992e+06        4.3821e+06        4.4165e+06
25165.0        9.0003e+06        8.8068e+06        9.2025e+06
25463.6        4.1230e+06        4.1124e+06        4.1336e+06
25484.8        4.1183e+06        4.0858e+06        4.1513e+06
28990.5        1.3604e+07        1.3550e+07        1.3658e+07
29094.6        5.9875e+06        5.9654e+06        6.0097e+06
29167.0        1.6703e+07        1.6387e+07        1.7032e+07
29748.5        5.6280e+05        5.6279e+05        5.6281e+05
30207.5        4.1567e+06        4.0927e+06        4.2228e+06
31045.8        3.2297e+06        3.2207e+06        3.2388e+06
31089.5        9.4448e+06        9.4187e+06        9.4709e+06
31711.0        2.4572e+06        2.4571e+06        2.4572e+06
31970.4        1.1648e+07        1.1605e+07        1.1691e+07

 

 

  196   Thu Nov 17 12:08:28 2016 GabrieleGeneralGeneralRemote control of air filters and roughing pump

I installed a network controlled power strip. The two air filters and the roughing pump are connected to this power strip and can be controlled remotely.

I added new buttons to the main MEDM screen to control them remotely.

  195   Thu Nov 17 12:06:39 2016 GabrieleGeneralVacuumSwitching on the IGM moves the disk

Here's a trend of the QPD signals when the IGM was turned on:

Turning it off does not bring the disk back.

  194   Thu Nov 17 09:35:51 2016 GabrieleGeneralMeasurementsS1600483

2016-11-17

  • 9:24am in chamber, balanced
  • 9:35am roughing pump on
  • 9:46am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1163451715
      Excitation (1100 Hz) at 1163451747 (60 s)
      Excitation (broad band) at 1163451809 (60 s)
      Quiet time after excitation: 1163451871

    • Quiet time before excitation: 1163459101
      Excitation (1100 Hz) at 1163459133 (60 s)
      Excitation (broad band) at 1163459195 (60 s)
      Quiet time after excitation: 1163459257

  • 5:12pm, pumps off

Results

2016-11-17 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1110.6        5.2498e+06        5.2441e+06        5.2555e+06
1129.0        1.9008e+06        1.8988e+06        1.9028e+06
2546.3        2.5599e+06        2.5581e+06        2.5616e+06
2583.7        6.4098e+05        6.4022e+05        6.4174e+05
3600.5        1.4764e+06        1.4762e+06        1.4766e+06
4375.0        1.7752e+06        1.7646e+06        1.7859e+06
4433.3        1.7154e+06        1.7143e+06        1.7164e+06
4494.9        2.5500e+05        2.5476e+05        2.5523e+05
5266.0        2.1175e+06        2.1173e+06        2.1177e+06
6760.5        1.4261e+06        1.4249e+06        1.4273e+06
6778.3        7.4161e+06        7.3905e+06        7.4418e+06
6833.2        1.0592e+06        1.0586e+06        1.0597e+06
6893.1        5.8100e+04        5.8096e+04        5.8104e+04
9460.5        1.3366e+06        1.3366e+06        1.3367e+06
9518.8        1.2075e+06        1.2066e+06        1.2084e+06
9577.0        1.4045e+06        1.4044e+06        1.4046e+06
10361.5        9.2547e+05        9.1119e+05        9.4021e+05
12698.7        9.8384e+05        9.8240e+05        9.8528e+05
14185.0        3.7722e+06        3.6989e+06        3.8485e+06
16093.2        1.3155e+06        1.3120e+06        1.3190e+06
16105.8        4.9502e+06        4.8453e+06        5.0597e+06
16300.5        8.9537e+05        8.9535e+05        8.9540e+05
20280.0        4.6430e+05        4.6429e+05        4.6431e+05
21990.6        2.5384e+06        2.5383e+06        2.5384e+06
23585.0        2.3607e+06        2.3607e+06        2.3608e+06
24661.0        1.9657e+05        1.9657e+05        1.9658e+05
25335.0        2.1695e+06        2.1694e+06        2.1695e+06
25641.0        3.7421e+05        3.7420e+05        3.7422e+05
27148.6        5.0750e+06        5.0749e+06        5.0751e+06
28901.1        1.5001e+06        1.5001e+06        1.5002e+06
29471.0        6.6842e+06        6.6841e+06        6.6843e+06
29536.0        5.1655e+05        5.1655e+05        5.1656e+05
31209.5        6.6357e+05        6.6356e+05        6.6358e+05
31845.0        1.1993e+06        1.1992e+06        1.1993e+06

2016-11-17 B

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1110.5        5.1474e+06        5.1428e+06        5.1520e+06
1129.0        1.7959e+06        1.7941e+06        1.7977e+06
2487.7        2.2593e+06        2.2231e+06        2.2966e+06
2546.1        2.4932e+06        2.4917e+06        2.4948e+06
2583.6        6.7688e+05        6.7638e+05        6.7738e+05
2604.4        2.3700e+06        2.3388e+06        2.4020e+06
4374.7        1.4494e+06        1.4112e+06        1.4898e+06
4433.2        1.6734e+06        1.6723e+06        1.6745e+06
4494.8        2.5845e+05        2.5822e+05        2.5869e+05
6760.3        1.3915e+06        1.3904e+06        1.3925e+06
6778.0        7.2310e+06        7.2210e+06        7.2410e+06
6833.0        1.0473e+06        1.0469e+06        1.0478e+06
6893.0        5.8318e+04        5.8314e+04        5.8322e+04
9460.3        1.0963e+06        1.0962e+06        1.0963e+06
9518.4        1.1841e+06        1.1833e+06        1.1849e+06
9576.6        1.1146e+06        1.1145e+06        1.1146e+06
10217.0        8.1285e+05        8.1281e+05        8.1289e+05
10361.1        9.0908e+05        8.9989e+05        9.1846e+05
12698.2        9.8778e+05        9.7292e+05        1.0031e+06
14184.5        3.8766e+06        3.8765e+06        3.8767e+06
16092.6        1.2675e+06        1.2645e+06        1.2704e+06
16105.1        4.7982e+06        4.6884e+06        4.9132e+06
16299.9        8.4326e+05        8.4043e+05        8.4612e+05
20241.0        4.9087e+05        4.9086e+05        4.9088e+05
20279.4        4.9025e+05        4.9023e+05        4.9026e+05
21368.0        2.6590e+06        2.6589e+06        2.6591e+06
21643.5        3.3917e+05        3.3916e+05        3.3918e+05
23584.4        2.1538e+06        2.1538e+06        2.1539e+06
23734.6        3.5223e+05        3.5223e+05        3.5224e+05
27147.4        4.9544e+06        4.8874e+06        5.0233e+06
28899.9        1.4530e+06        1.4374e+06        1.4690e+06
29080.0        8.8363e+06        8.8362e+06        8.8365e+06
29522.4        4.6567e+05        4.6567e+05        4.6568e+05
30440.3        1.2458e+06        1.2457e+06        1.2458e+06
31211.0        6.6406e+05        6.6405e+05        6.6407e+05

 

  193   Wed Nov 16 15:57:21 2016 GabrieleGeneralMeasurementsS1600481

2016-11-16

  • 3:56pm, in chamber, balanced
  • 3:57pm, roughing pump on
  • 4:07pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1163383462
      Excitation (1100 Hz) at 1163383494 (60 s)
      Excitation (broad band) at 1163383556 (60 s)
      Quiet time after excitation: 1163383618

    • Quiet time before excitation: 1163394448
      Excitation (1100 Hz) at 1163394480 (60 s)
      Excitation (broad band) at 1163394542 (60 s)
      Quiet time after excitation: 1163394604

    • Quiet time before excitation: 1163405434
      xcitation (1100 Hz) at 1163405466 (60 s)
      Excitation (broad band) at 1163405528 (60 s)
      Quiet time after excitation: 1163405590

2016-11-17

  • 8:46am, pumps off

Results

2016-11-16 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1094.3        1.2707e+07        1.2695e+07        1.2720e+07
2510.4        6.6163e+06        6.5897e+06        6.6431e+06
2548.6        1.1938e+05        1.1913e+05        1.1964e+05
4373.1        4.5232e+06        4.5188e+06        4.5275e+06
4435.8        2.3382e+05        2.3366e+05        2.3398e+05
6671.1        3.5757e+06        3.5748e+06        3.5767e+06
6697.5        1.8817e+07        1.8807e+07        1.8827e+07
6744.3        2.8118e+06        2.7759e+06        2.8485e+06
9395.6        2.2865e+06        2.2775e+06        2.2955e+06
10093.3        1.1448e+06        1.1445e+06        1.1452e+06
10240.0        2.0555e+06        2.0452e+06        2.0660e+06
11475.6        8.4917e+04        8.4913e+04        8.4921e+04
12537.1        2.2927e+06        2.2865e+06        2.2989e+06
15891.2        2.2520e+06        2.2469e+06        2.2572e+06
15914.6        7.8120e+06        7.8077e+06        7.8163e+06
16099.4        1.7394e+06        1.7372e+06        1.7415e+06
18426.5        8.3448e+05        8.2560e+05        8.4355e+05
21118.1        7.2440e+06        7.2347e+06        7.2532e+06
24381.7        1.0371e+06        1.0342e+06        1.0400e+06
24699.4        2.2364e+06        2.2168e+06        2.2563e+06
25794.0        5.1477e+06        5.0369e+06        5.2635e+06
26149.5        1.0102e+06        1.0102e+06        1.0102e+06
26830.0        1.0373e+07        1.0152e+07        1.0604e+07
28636.6        3.6000e+06        3.5828e+06        3.6174e+06
28745.9        1.7322e+07        1.7311e+07        1.7334e+07
29887.3        1.1030e+07        1.0956e+07        1.1105e+07
30842.6        2.4718e+06        2.4380e+06        2.5066e+06
31616.4        7.0754e+05        7.0753e+05        7.0755e+05
31640.4        1.9543e+06        1.9543e+06        1.9544e+06
32236.4        2.9076e+06        2.8843e+06        2.9313e+06

2016-11-16 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1094.0        1.1214e+07        1.1205e+07        1.1222e+07
2510.4        5.5745e+06        5.5710e+06        5.5780e+06
2548.5        1.3663e+05        1.3573e+05        1.3755e+05
4373.0        3.7426e+06        3.7368e+06        3.7484e+06
4435.8        2.3376e+05        2.3329e+05        2.3423e+05
6671.1        2.9264e+06        2.9246e+06        2.9282e+06
6697.5        1.6992e+07        1.6933e+07        1.7052e+07
6744.2        2.3626e+06        2.3012e+06        2.4273e+06
9395.5        2.0654e+06        2.0480e+06        2.0831e+06
10093.2        1.0860e+06        1.0850e+06        1.0870e+06
10239.9        2.0757e+06        2.0666e+06        2.0849e+06
11475.6        8.7886e+04        8.7883e+04        8.7890e+04
12537.0        1.8327e+06        1.8228e+06        1.8426e+06
14012.0        5.2022e+06        5.1550e+06        5.2502e+06
15891.1        2.1796e+06        2.1738e+06        2.1855e+06
15914.4        9.3495e+06        9.3457e+06        9.3534e+06
16099.4        1.6351e+06        1.6122e+06        1.6588e+06
21118.0        7.0081e+06        6.9894e+06        7.0268e+06
24381.5        9.2600e+05        9.1906e+05        9.3305e+05
24700.0        2.0943e+06        2.0943e+06        2.0943e+06
26830.0        9.4362e+06        9.3340e+06        9.5407e+06
28544.3        3.8658e+06        3.8010e+06        3.9328e+06
28636.3        3.0021e+06        2.9410e+06        3.0657e+06
28745.5        1.6500e+07        1.6430e+07        1.6571e+07
29887.7        1.0548e+07        1.0517e+07        1.0579e+07
30843.0        2.1072e+06        2.0887e+06        2.1260e+06
31616.6        6.3649e+05        6.3647e+05        6.3650e+05
31640.6        1.5725e+06        1.5725e+06        1.5726e+06
32236.5        2.8396e+06        2.8396e+06        2.8397e+06

2016-11-16 C

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1094.0        1.0880e+07        1.0873e+07        1.0886e+07
2188.0        1.0548e+07        1.0120e+07        1.1012e+07
2510.3        5.5686e+06        5.5662e+06        5.5709e+06
2548.5        1.4731e+05        1.4406e+05        1.5070e+05
3949.0        1.7959e+04        1.7957e+04        1.7961e+04
4373.0        3.7404e+06        3.7350e+06        3.7459e+06
4435.7        2.3448e+05        2.3401e+05        2.3495e+05
6671.0        2.9331e+06        2.9319e+06        2.9343e+06
6697.5        1.6931e+07        1.6927e+07        1.6936e+07
6744.3        2.3960e+06        2.3820e+06        2.4101e+06
9395.5        2.1238e+06        2.1073e+06        2.1405e+06
10093.2        1.0588e+06        1.0583e+06        1.0592e+06
10239.8        2.2057e+06        2.1138e+06        2.3059e+06
11310.5        8.0028e+04        8.0025e+04        8.0032e+04
12537.0        1.9366e+06        1.8964e+06        1.9785e+06
14012.0        4.0122e+06        3.9559e+06        4.0700e+06
15891.3        2.2887e+06        2.2460e+06        2.3331e+06
15914.3        1.1138e+07        1.1136e+07        1.1140e+07
16099.3        1.7494e+06        1.7465e+06        1.7523e+06
21117.9        7.0869e+06        7.0802e+06        7.0935e+06
24381.4        9.2827e+05        9.2825e+05        9.2828e+05
24700.0        1.9847e+06        1.9846e+06        1.9847e+06
26829.7        9.1098e+06        8.9846e+06        9.2385e+06
28544.0        3.9652e+06        3.9652e+06        3.9653e+06
28746.0        1.5590e+07        1.5326e+07        1.5863e+07
29887.6        1.0657e+07        1.0505e+07        1.0813e+07
30843.4        2.0614e+06        2.0613e+06        2.0614e+06
32236.6        2.9582e+06        2.9062e+06        3.0122e+06

 

 

 

  192   Wed Nov 16 09:43:25 2016 Gabriele, AlastairGeneralDaily ProgressCO2 laser polishing setup

Yesterday we assembled the lase polishing system. The Co2 laser power can be controlled using a waveplate, so we can turn on the laser at maximum power and let it stabilize, before actually turning up the power sent to the disk.

The beam is focused with a 10" focal length lens, and sent to the disk edge, poiting slightly upward to avoid hitting any other part of the disk.

The disk is moved with a combination of a linear and rotation stage, controlled with a MATLAB script. We tuned the translation and rotation speed so that the edge always moves at about 0.5 mm/s. Some refinement of the movimentation procedure will follow.

We tried the setup with one of the damaged samples, and the results are quite good.

More work this afternoon

Attachment 2: 2016-11-15_16.35.14.jpg
2016-11-15_16.35.14.jpg
  191   Wed Nov 16 09:35:59 2016 GabrieleGeneralMeasurementsS1600477

2016-11-16

  • 9:34am in chamber, balanced
  • 9:35am, roughing pump on
  • 9:46am, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1163360707
      Excitation (1100 Hz) at 1163360739 (60 s)
      Excitation (broad band) at 1163360801 (60 s)
      Quiet time after excitation: 1163360863

    • Quiet time before excitation: 1163368093
      Excitation (1100 Hz) at 1163368125 (60 s)
      Excitation (broad band) at 1163368187 (60 s)
      Quiet time after excitation: 1163368249

  • 3:31pm, pumps off

 

​​Results

2016-11-16 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1114.2        2.3007e+07        2.2987e+07        2.3027e+07
1133.4        2.2807e+06        2.2763e+06        2.2851e+06
2556.5        8.4325e+06        8.2252e+06        8.6504e+06
4452.8        8.8612e+06        8.8539e+06        8.8684e+06
4516.8        2.6142e+05        2.6001e+05        2.6284e+05
6792.4        6.6102e+06        6.6082e+06        6.6123e+06
6819.1        1.1027e+07        1.1024e+07        1.1031e+07
6864.1        1.9002e+06        1.8925e+06        1.9080e+06
9565.8        4.6820e+06        4.6648e+06        4.6993e+06
10275.1        1.5716e+07        1.5709e+07        1.5723e+07
12763.8        4.3417e+06        4.3388e+06        4.3447e+06
12886.1        6.6216e+05        6.5444e+05        6.7006e+05
14262.2        1.2383e+07        1.2361e+07        1.2405e+07
16179.4        5.6376e+06        5.6260e+06        5.6492e+06
16200.8        1.4003e+07        1.3963e+07        1.4043e+07
16388.5        4.0876e+06        4.0841e+06        4.0911e+06
17292.4        2.4283e+06        2.3986e+06        2.4587e+06
18752.8        1.3368e+07        1.3331e+07        1.3405e+07
18921.3        1.1843e+06        1.1815e+06        1.1871e+06
23710.2        1.1569e+07        1.1554e+07        1.1584e+07
23997.7        1.1157e+06        1.1157e+06        1.1158e+06
24816.8        2.5474e+06        2.5335e+06        2.5615e+06
25111.0        7.5175e+06        7.2921e+06        7.7572e+06
27302.7        1.4825e+07        1.4792e+07        1.4858e+07
29047.5        7.2879e+06        7.2272e+06        7.3495e+06
29140.0        4.9904e+06        4.9903e+06        4.9904e+06
29261.0        5.6779e+06        5.6778e+06        5.6779e+06
29673.0        4.5825e+05        4.5824e+05        4.5825e+05
29707.5        3.0382e+06        3.0381e+06        3.0382e+06
31013.6        8.4799e+05        8.4798e+05        8.4800e+05
31038.5        2.4742e+06        2.4742e+06        2.4742e+06
31914.0        6.6181e+06        6.4402e+06        6.8060e+06

 

2016-11-16 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1114.0        2.2032e+07        2.2016e+07        2.2049e+07
1133.4        1.9600e+06        1.9526e+06        1.9676e+06
2556.4        8.2944e+06        8.2588e+06        8.3304e+06
4452.9        8.1942e+06        8.1921e+06        8.1962e+06
4516.9        2.7235e+05        2.6914e+05        2.7564e+05
6792.4        6.0530e+06        6.0514e+06        6.0545e+06
6819.2        1.0600e+07        1.0597e+07        1.0602e+07
6864.1        1.8208e+06        1.8175e+06        1.8241e+06
9565.9        4.2971e+06        4.2755e+06        4.3189e+06
10275.1        1.4597e+07        1.4574e+07        1.4621e+07
12763.8        3.9316e+06        3.9287e+06        3.9344e+06
12886.2        6.4555e+05        6.3907e+05        6.5217e+05
14262.3        1.1328e+07        1.1324e+07        1.1331e+07
16179.5        5.2117e+06        5.1197e+06        5.3072e+06
16201.0        1.3620e+07        1.3572e+07        1.3668e+07
16388.6        3.7046e+06        3.6996e+06        3.7097e+06
17292.3        2.2071e+06        2.2070e+06        2.2072e+06
18921.6        1.2022e+06        1.1964e+06        1.2080e+06
21494.3        8.4330e+06        8.4082e+06        8.4580e+06
23710.4        1.0625e+07        1.0605e+07        1.0645e+07
23997.5        1.0698e+06        1.0697e+06        1.0698e+06
24817.0        2.3920e+06        2.3880e+06        2.3961e+06
25111.0        7.3811e+06        7.1248e+06        7.6564e+06
27302.9        1.3847e+07        1.3819e+07        1.3874e+07
29047.9        6.7327e+06        6.6911e+06        6.7749e+06
29673.0        4.4653e+05        4.4652e+05        4.4654e+05
29707.5        2.7395e+06        2.7224e+06        2.7569e+06

 

 

 

 

 

  190   Tue Nov 15 16:46:48 2016 GabrieleGeneralMeasurementsS1600476

2016-11-15

  • 4:45pm in chamber, balanced
  • 4:46pm, roughing pump on
  • 4:56pm, turbo pump on
  • Excitations:

    • Quiet time before excitation: 1163303050
      Excitation (1100 Hz) at 1163303082 (60 s)
      1kHz excitation finished
      Excitation (broad band) at 1163303144 (60 s)
      Quiet time after excitation: 1163303206

    • Quiet time before excitation: 1163314036
      Excitation (1100 Hz) at 1163314068 (60 s)
      Excitation (broad band) at 1163314130 (60 s)
      Quiet time after excitation: 1163314192

    • Quiet time before excitation: 1163325022
      Excitation (1100 Hz) at 1163325054 (60 s)
      1kHz excitation finished
      Excitation (broad band) at 1163325116 (60 s)
      Quiet time after excitation: 1163325178

2016-11-16

  • 8:25am pumps off

Results

2016-11-15 A

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1121.1        5.0944e+06        5.0905e+06        5.0982e+06
1140.0        1.1654e+06        1.1635e+06        1.1673e+06
2570.2        2.6712e+06        2.6699e+06        2.6724e+06
2608.7        9.7800e+05        9.7302e+05        9.8303e+05
4474.9        1.8629e+06        1.8624e+06        1.8634e+06
4538.1        3.2875e+05        3.2846e+05        3.2905e+05
6824.1        1.4823e+06        1.4812e+06        1.4834e+06
6840.2        7.3018e+06        7.2982e+06        7.3055e+06
6893.2        9.2821e+05        9.2713e+05        9.2929e+05
6962.9        4.9646e+04        4.9643e+04        4.9650e+04
9608.9        9.1232e+05        9.1133e+05        9.1332e+05
10308.9        5.1598e+06        5.0344e+06        5.2915e+06
10457.7        4.6941e+05        4.6647e+05        4.7239e+05
12819.2        1.0332e+06        1.0323e+06        1.0342e+06
12939.5        4.1373e+05        4.0825e+05        4.1935e+05
14310.4        3.0088e+06        3.0015e+06        3.0161e+06
16241.1        1.4065e+06        1.3908e+06        1.4227e+06
16251.8        5.8974e+06        5.8741e+06        5.9209e+06
16456.0        5.1136e+05        5.0798e+05        5.1478e+05
18816.0        2.8314e+06        2.7798e+06        2.8850e+06
18986.6        6.7793e+05        6.7791e+05        6.7795e+05
20432.7        1.5260e+05        1.5259e+05        1.5260e+05
20473.7        4.7475e+05        4.7474e+05        4.7476e+05
21560.7        5.5350e+06        5.4921e+06        5.5786e+06
24918.6        7.4993e+05        7.4992e+05        7.4995e+05
29247.5        9.5138e+05        9.5137e+05        9.5140e+05
29340.0        1.1583e+07        1.1439e+07        1.1730e+07
29822.7        8.1204e+05        8.1202e+05        8.1205e+05

2016-11-15 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1121.1        4.6065e+06        4.6038e+06        4.6091e+06
1140.0        8.0197e+05        8.0001e+05        8.0393e+05
2570.2        2.3051e+06        2.3035e+06        2.3067e+06
2608.7        9.1341e+05        9.1205e+05        9.1477e+05
4017.5        2.8194e+04        2.8190e+04        2.8197e+04
4475.0        1.6430e+06        1.6421e+06        1.6440e+06
4538.1        3.2912e+05        3.2849e+05        3.2976e+05
6824.1        1.2995e+06        1.2986e+06        1.3005e+06
6840.2        6.5726e+06        6.5697e+06        6.5756e+06
6893.2        8.6042e+05        8.5868e+05        8.6217e+05
6963.0        5.0409e+04        5.0405e+04        5.0412e+04
9609.0        1.0692e+06        1.0604e+06        1.0782e+06
10309.0        5.1393e+06        4.9409e+06        5.3542e+06
10457.7        4.6470e+05        4.4160e+05        4.9034e+05
12819.3        9.0580e+05        9.0410e+05        9.0750e+05
12939.6        4.0804e+05        3.9544e+05        4.2148e+05
14310.5        2.6132e+06        2.6107e+06        2.6158e+06
16241.2        1.2941e+06        1.2868e+06        1.3015e+06
16251.9        5.9674e+06        5.9536e+06        5.9812e+06
16456.2        7.3080e+05        7.2814e+05        7.3347e+05
18816.1        2.5342e+06        2.5282e+06        2.5402e+06
18987.0        6.3654e+05        6.3652e+05        6.3656e+05
21560.9        5.2433e+06        5.1712e+06        5.3174e+06
21610.4        2.3102e+06        2.3102e+06        2.3103e+06
24918.9        6.6504e+05        6.5864e+05        6.7156e+05
27388.0        4.7256e+06        4.6897e+06        4.7619e+06
29153.6        1.2791e+06        1.2790e+06        1.2791e+06
29248.0        8.4919e+05        8.4918e+05        8.4921e+05
29340.0        1.0910e+07        1.0363e+07        1.1519e+07
31810.6        3.0968e+06        3.0967e+06        3.0968e+06

2016-11-15 C

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1121.0        4.5968e+06        4.5942e+06        4.5994e+06
1140.0        8.9250e+05        8.9149e+05        8.9352e+05
2570.2        2.2831e+06        2.2817e+06        2.2845e+06
2608.7        8.9996e+05        8.9803e+05        9.0190e+05
4474.9        1.5002e+06        1.4983e+06        1.5021e+06
4538.1        3.2279e+05        3.2220e+05        3.2338e+05
6824.2        1.2882e+06        1.2858e+06        1.2906e+06
6840.3        6.5213e+06        6.5146e+06        6.5281e+06
6893.2        8.6464e+05        8.6311e+05        8.6617e+05
9608.9        1.0570e+06        1.0416e+06        1.0728e+06
10309.0        5.0851e+06        4.9675e+06        5.2084e+06
10457.8        4.5509e+05        4.4305e+05        4.6780e+05
12819.4        9.0619e+05        9.0128e+05        9.1116e+05
12940.0        4.2538e+05        4.2537e+05        4.2540e+05
14310.5        2.5765e+06        2.5717e+06        2.5814e+06
16241.2        1.2956e+06        1.2883e+06        1.3030e+06
16251.8        6.0038e+06        5.9865e+06        6.0211e+06
16456.3        7.4603e+05        7.4232e+05        7.4978e+05
18816.0        2.4942e+06        2.4808e+06        2.5077e+06
18987.0        6.4961e+05        6.4960e+05        6.4963e+05
20432.7        1.4994e+05        1.4993e+05        1.4994e+05
20474.1        4.3164e+05        4.3163e+05        4.3165e+05
21560.8        5.2562e+06        5.1891e+06        5.3251e+06
23792.3        1.9386e+06        1.9386e+06        1.9386e+06
24918.9        6.6629e+05        6.6628e+05        6.6631e+05
27387.9        4.7143e+06        4.6193e+06        4.8134e+06
29149.0        5.6268e+06        5.6267e+06        5.6269e+06
29248.0        8.5279e+05        8.5277e+05        8.5280e+05
29340.2        1.0748e+07        1.0565e+07        1.0937e+07
31811.0        3.0852e+06        3.0852e+06        3.0853e+06

 

 

 

 

Attachment 3: ringdowns.png
ringdowns.png
Attachment 8: ringdowns.png
ringdowns.png
  189   Tue Nov 15 10:35:11 2016 GabrieleMechanicsDaily ProgressParts for laser polishing setup are here

The parts all fit as expected. They're mounted on the stages.

  188   Tue Nov 15 10:08:28 2016 GabrieleGeneralMeasurementsS1600475

2016-11-15

  • 10:01am in chamber, balanced
  • 10:03am, roughing pump on
  • 10:21am turbo pump on
  • 11:57am, excitation (3kV, 60s), quiet time before 1163275060, quiet time after 1163275168
  • 2:21pm, excitation (3kV, 60s), quiet time before 1163283684, quiet time after 1163283793
  • 3:27pm, pumps off

Results

2016-11-15 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1111.4        7.0708e+06        7.0599e+06        7.0816e+06
2548.7        1.5867e+06        1.5859e+06        1.5876e+06
4438.1        2.7798e+06        2.7786e+06        2.7810e+06
4502.1        3.2580e+05        3.2004e+05        3.3178e+05
6768.6        2.4624e+06        2.4597e+06        2.4652e+06
6780.9        7.9199e+06        7.9148e+06        7.9250e+06
6841.2        1.7197e+06        1.7187e+06        1.7206e+06
9532.6        2.0042e+06        2.0003e+06        2.0082e+06
10221.8        8.7455e+06        8.7384e+06        8.7526e+06
10370.9        4.7482e+05        4.7142e+05        4.7827e+05
12719.2        1.6940e+06        1.6924e+06        1.6956e+06
12840.1        5.4075e+05        5.3459e+05        5.4704e+05
14190.7        6.7551e+06        6.7451e+06        6.7651e+06
16112.3        7.9161e+06        7.8847e+06        7.9478e+06
18660.2        4.6512e+06        4.6392e+06        4.6633e+06
20318.5        1.2487e+06        1.2411e+06        1.2563e+06
21381.3        8.8036e+06        8.7663e+06        8.8412e+06
23749.2        4.6262e+05        4.6261e+05        4.6263e+05
24133.5        1.1367e+06        1.1367e+06        1.1367e+06
24174.5        1.1856e+06        1.1856e+06        1.1857e+06
24732.5        1.0615e+06        1.0615e+06        1.0615e+06
25308.0        2.8236e+06        2.8235e+06        2.8237e+06
27162.8        4.9157e+06        4.9061e+06        4.9254e+06
29011.1        1.7786e+06        1.7786e+06        1.7787e+06
29094.1        1.0590e+07        1.0533e+07        1.0647e+07
31820.6        1.1840e+06        1.1840e+06        1.1840e+06
32083.0        2.9047e+06        2.9047e+06        2.9048e+06

 

2016-11-15 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1111.4        5.3019e+06        5.2950e+06        5.3088e+06
2548.7        1.5590e+06        1.5539e+06        1.5642e+06
4438.1        1.8590e+06        1.8580e+06        1.8601e+06
4502.1        2.9799e+05        2.9699e+05        2.9901e+05
6768.6        1.5724e+06        1.5702e+06        1.5747e+06
6781.1        5.7773e+06        5.7746e+06        5.7800e+06
6841.3        1.2422e+06        1.2411e+06        1.2432e+06
9532.6        1.2514e+06        1.2433e+06        1.2597e+06
10221.8        5.6805e+06        5.6618e+06        5.6993e+06
10371.1        4.5285e+05        4.4967e+05        4.5607e+05
12719.3        1.0666e+06        1.0651e+06        1.0682e+06
12840.0        5.0460e+05        4.9209e+05        5.1776e+05
14190.7        4.2119e+06        4.1999e+06        4.2240e+06
16111.0        5.1330e+06        5.0960e+06        5.1705e+06
18089.0        9.7188e+05        9.7185e+05        9.7190e+05
18660.4        2.9670e+06        2.9374e+06        2.9973e+06
20318.7        8.0187e+05        7.9553e+05        8.0832e+05
21381.4        6.4885e+06        6.4474e+06        6.5302e+06
24133.0        8.2483e+05        8.2481e+05        8.2485e+05
24174.4        8.3029e+05        8.3027e+05        8.3030e+05
27163.0        3.6182e+06        3.6009e+06        3.6356e+06
28916.0        1.3350e+06        1.3349e+06        1.3350e+06
29094.3        8.9762e+06        8.9139e+06        9.0394e+06
29562.6        3.7546e+05        3.7545e+05        3.7547e+05
31820.5        1.0901e+06        1.0901e+06        1.0901e+06

 

 

  187   Mon Nov 14 14:41:08 2016 GabrieleGeneralMeasurementsS1600474

2016-11-14

  • 2:40pm, in chamber, balanced
  • 2:41pm, roughing pump on
  • 2:50pm, turbo pump on
  • 4:12pm, excitation (2kV, 60s), quiet time before 1163203908, quiet time after 1163204078
  • More excitations:

    • Quiet time before excitation: 1163213574
      Excitation (1100 Hz) at 1163213607 (60 s)
      Excitation (broad band) at 1163213668 (60 s)
      Quiet time after excitation: 1163213730

    • Quiet time before excitation: 1163224560
      Excitation (1100 Hz) at 1163224592 (60 s)
      Excitation (broad band) at 1163224654 (60 s)
      Quiet time after excitation: 1163224716

    • Quiet time before excitation: 1163235546
      Excitation (1100 Hz) at 1163235578 (60 s)
      Excitation (broad band) at 1163235640 (60 s)
      Quiet time after excitation: 1163235702

2016-11-15

  • 8:49am pumps off

Results

2016-11-14 A

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1107.7        4.6075e+06        4.6037e+06        4.6113e+06
2540.0        5.4810e+06        5.4785e+06        5.4836e+06
4490.2        2.5331e+05        2.5304e+05        2.5359e+05
6743.0        3.3684e+06        3.3662e+06        3.3707e+06
6746.9        3.3685e+06        3.3665e+06        3.3706e+06
6757.6        7.1350e+06        7.1255e+06        7.1445e+06
6772.0        5.8021e+06        5.4002e+06        6.2684e+06
6824.1        2.4899e+06        2.4871e+06        2.4928e+06
9501.9        5.4497e+06        5.4322e+06        5.4674e+06
10187.8        6.4223e+06        6.4184e+06        6.4262e+06
10343.0        2.3547e+06        2.3256e+06        2.3845e+06
12679.1        3.9818e+06        3.9685e+06        3.9952e+06
12806.0        3.2209e+05        3.1252e+05        3.3227e+05
14145.0        4.1585e+06        4.1033e+06        4.2152e+06
16050.7        2.2872e+06        2.2699e+06        2.3047e+06
16058.8        6.6646e+06        6.6544e+06        6.6748e+06
16281.1        2.3068e+06        2.2741e+06        2.3405e+06
18601.1        5.3760e+06        5.3475e+06        5.4049e+06
18776.0        5.7876e+05        5.7874e+05        5.7877e+05
21315.5        8.6998e+06        8.5404e+06        8.8652e+06
23520.3        3.4527e+06        3.4258e+06        3.4799e+06
24658.2        1.3013e+06        1.3012e+06        1.3013e+06
28810.3        6.4869e+06        6.4174e+06        6.5579e+06
28909.1        4.2011e+06        4.1313e+06        4.2734e+06
29001.9        8.7561e+06        8.7012e+06        8.8118e+06
29526.3        2.1542e+06        2.1311e+06        2.1777e+06
29563.5        5.9460e+06        5.8940e+06        5.9989e+06
30463.0        2.0306e+06        2.0306e+06        2.0307e+06
31307.8        2.0177e+06        2.0176e+06        2.0177e+06
31915.5        2.4119e+06        2.4118e+06        2.4119e+06
32178.4        6.3761e+06        6.2763e+06        6.4791e+06

 

2015-11-14 B

% Freq        Q                 Q (C.I. 95%)        Q (C.I. 95%)
1107.5        3.2516e+06        3.2494e+06        3.2538e+06
2539.9        4.5383e+06        4.5368e+06        4.5397e+06
4423.0        2.2248e+06        2.2238e+06        2.2257e+06
4490.2        2.6724e+05        2.6695e+05        2.6754e+05
6688.5        3.5492e+06        3.4597e+06        3.6434e+06
6746.8        3.5335e+06        3.5324e+06        3.5345e+06
6757.6        7.5849e+06        7.5835e+06        7.5864e+06
6824.1        2.4839e+06        2.4824e+06        2.4853e+06
9501.8        4.6405e+06        4.6330e+06        4.6480e+06
10187.7        6.1494e+06        6.1467e+06        6.1520e+06
10342.9        2.5426e+06        2.5181e+06        2.5676e+06
12679.0        3.3433e+06        3.3374e+06        3.3492e+06
14144.6        3.9980e+06        3.8729e+06        4.1316e+06
16050.5        1.9010e+06        1.8941e+06        1.9081e+06
16058.6        6.4936e+06        6.4881e+06        6.4991e+06
16281.1        2.7856e+06        2.7785e+06        2.7928e+06
18215.4        2.2829e+06        2.2828e+06        2.2829e+06
18600.9        7.3657e+06        7.3568e+06        7.3746e+06
18775.6        5.8072e+05        5.8070e+05        5.8073e+05
23520.1        1.7679e+06        1.7538e+06        1.7822e+06
24658.4        8.3031e+05        8.3030e+05        8.3033e+05
27082.0        6.7421e+06        6.5672e+06        6.9266e+06
28810.1        6.1339e+06        6.1000e+06        6.1682e+06
28909.0        4.3651e+06        4.3651e+06        4.3652e+06
29001.7        9.2108e+06        9.1518e+06        9.2705e+06
29526.1        2.0948e+06        2.0765e+06        2.1133e+06
30463.0        1.5875e+06        1.5875e+06        1.5876e+06
31308.0        1.9777e+06        1.9777e+06        1.9778e+06
31915.8        2.5156e+06        2.5156e+06        2.5157e+06

2015-11-14 C

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1107.9        2.6382e+06        2.6360e+06        2.6404e+06
2539.9        4.3446e+06        4.3432e+06        4.3461e+06
4423.0        2.1544e+06        2.1534e+06        2.1553e+06
4490.2        2.7485e+05        2.7471e+05        2.7499e+05
6746.8        3.2717e+06        3.2705e+06        3.2728e+06
6757.6        6.3809e+06        6.3797e+06        6.3821e+06
6824.1        2.3227e+06        2.3215e+06        2.3238e+06
9501.8        4.6211e+06        4.6073e+06        4.6351e+06
10187.7        6.5099e+06        6.5090e+06        6.5109e+06
10342.9        2.6098e+06        2.5853e+06        2.6347e+06
12679.1        3.2362e+06        3.2276e+06        3.2449e+06
14144.6        4.1799e+06        4.1049e+06        4.2577e+06
16050.5        2.8054e+06        2.8002e+06        2.8106e+06
16058.6        8.1729e+06        8.1564e+06        8.1895e+06
16281.0        3.2400e+06        3.2399e+06        3.2401e+06
18600.9        7.8239e+06        7.7914e+06        7.8565e+06
18775.7        5.9520e+05        5.9518e+05        5.9522e+05
20255.0        1.0929e+06        1.0929e+06        1.0929e+06
21315.4        8.0568e+06        7.9081e+06        8.2112e+06
23520.0        7.7176e+05        7.7174e+05        7.7178e+05
24658.0        6.0199e+05        6.0197e+05        6.0200e+05
28810.0        6.1531e+06        6.0894e+06        6.2180e+06
29001.6        9.2904e+06        9.2285e+06        9.3531e+06
29526.1        2.0902e+06        2.0700e+06        2.1108e+06
31308.0        1.8177e+06        1.8177e+06        1.8177e+06
31916.0        2.4457e+06        2.4457e+06        2.4458e+06
32179.0        6.2208e+06        6.2207e+06        6.2209e+06

2016-11-14 D

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1107.8        2.5483e+06        2.5470e+06        2.5497e+06
2539.9        4.1479e+06        4.1464e+06        4.1493e+06
4423.0        2.1043e+06        2.1036e+06        2.1050e+06
4490.2        2.8179e+05        2.8161e+05        2.8196e+05
6746.7        3.1144e+06        3.1133e+06        3.1155e+06
6757.5        5.8249e+06        5.8241e+06        5.8257e+06
6761.4        5.8283e+06        5.8275e+06        5.8292e+06
6824.0        2.2641e+06        2.2633e+06        2.2649e+06
9501.8        4.6535e+06        4.6342e+06        4.6730e+06
10187.7        7.0149e+06        7.0125e+06        7.0173e+06
10342.8        2.6508e+06        2.6469e+06        2.6548e+06
12679.0        3.2619e+06        3.2587e+06        3.2650e+06
14144.6        3.7736e+06        3.7205e+06        3.8281e+06
16050.4        2.7995e+06        2.7862e+06        2.8129e+06
16058.5        8.0705e+06        8.0662e+06        8.0747e+06
16280.9        3.3065e+06        3.3007e+06        3.3123e+06
18600.8        7.9582e+06        7.9432e+06        7.9733e+06
18775.6        5.8072e+05        5.7705e+05        5.8443e+05
20254.7        1.2456e+06        1.2295e+06        1.2622e+06
21315.0        8.2763e+06        8.0802e+06        8.4823e+06
23519.9        1.4508e+06        1.4356e+06        1.4663e+06
28810.0        6.1795e+06        6.0919e+06        6.2696e+06
29001.4        9.6787e+06        9.6439e+06        9.7138e+06
29525.7        2.0513e+06        2.0512e+06        2.0513e+06
29564.2        4.8725e+06        4.8325e+06        4.9133e+06
31308.0        1.8091e+06        1.8090e+06        1.8091e+06

 

 

 

Attachment 3: ringdowns.png
ringdowns.png
  186   Mon Nov 14 11:28:33 2016 GabrieleGeneralVacuumViton pads

I added three 1"x1" viton pads below the base plate, and realigned the entire optical system to the horizontal reference

The pads seem to reduce a bit the vibrations in the QPD_X direction, but significantly improve the situation in the QPD_Y direction, see below:

 

  185   Mon Nov 14 11:13:33 2016 GabrieleGeneralMeasurementsS1600467

2016-11-14

Note: marked as "bad edge" by Alena

  • 11:00 in chamber, balanced
  • 11:01 roughing pump on
  • 11:13 turbo pump on
  • 12:28 excitation (2kV, 60s), quiet time before 1163190441, quiet time after 1163190685
  • 1:54pm, pumps off

Results

2016-11-14

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1102.7        6.3619e+06        6.3431e+06        6.3807e+06
1122.2        1.8673e+06        1.8623e+06        1.8722e+06
2530.3        3.7678e+06        3.7639e+06        3.7717e+06
2569.2        1.4261e+06        1.4195e+06        1.4327e+06
4407.7        2.7665e+06        2.7429e+06        2.7904e+06
4470.7        2.6197e+05        2.6166e+05        2.6228e+05
6723.0        1.7620e+06        1.7567e+06        1.7674e+06
6734.0        6.9851e+06        6.9809e+06        6.9893e+06
6794.4        1.8494e+06        1.8476e+06        1.8513e+06
9470.5        6.0578e+04        6.0574e+04        6.0581e+04
10152.1        3.8492e+06        3.8370e+06        3.8615e+06
10301.4        4.0275e+05        4.0075e+05        4.0478e+05
12638.1        7.3205e+05        7.2391e+05        7.4036e+05
12756.2        7.5936e+05        7.5933e+05        7.5939e+05
14096.2        5.9662e+06        5.9355e+06        5.9971e+06
16001.5        1.7340e+06        1.7104e+06        1.7582e+06
16227.1        1.2612e+06        1.2585e+06        1.2639e+06
20142.2        5.4880e+05        5.4878e+05        5.4881e+05
20191.9        5.5732e+05        5.5731e+05        5.5734e+05
21236.3        2.6162e+06        2.6086e+06        2.6238e+06
22255.0        1.5152e+06        1.5152e+06        1.5152e+06
23445.0        1.0949e+06        1.0824e+06        1.1077e+06
24391.4        7.4968e+05        7.4967e+05        7.4970e+05
24545.8        1.8061e+05        1.8060e+05        1.8061e+05
24580.0        7.5466e+05        7.5465e+05        7.5468e+05
25561.4        1.2230e+06        1.2230e+06        1.2230e+06
26982.5        3.8512e+06        3.8511e+06        3.8512e+06
28730.1        1.6735e+06        1.6617e+06        1.6855e+06
28824.0        9.7775e+05        9.7774e+05        9.7777e+05
28896.2        4.3667e+06        4.3190e+06        4.4154e+06
31387.2        5.9592e+05        5.9592e+05        5.9593e+05
32301.5        6.3985e+05        6.3984e+05        6.3986e+05

 

  184   Mon Nov 14 08:54:49 2016 Alena, CalumGeneralGeneralAnnealing run

Annealing run (472-477) on 3" wafers - Crime 11/11/2016 https://dcc.ligo.org/T1600527

  183   Sun Nov 13 19:12:56 2016 GabrieleGeneralMeasurementsS1600471

2016-11-13

Note: some scratches or contamination visible on the surface near the egde

  • 7:03pm, in chamber, balanced
  • 7:04pm, roughing pump on
  • 7:12pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1163133663
      Excitation (1100 Hz) at 1163133695 (60 s)
      Excitation (broad band) at 1163133757 (60 s)
      Quiet time after excitation: 1163133819
    • Quiet time before excitation: 1163144649
      Excitation (1100 Hz) at 1163144682 (60 s)
      Excitation (broad band) at 1163144744 (60 s)
      Quiet time after excitation: 1163144806
    • Quiet time before excitation: 1163155636
      Excitation (1100 Hz) at 1163155669 (60 s)
      Excitation (broad band) at 1163155731 (60 s)
      X3:CR1-ESD_GAIN => 0
      Quiet time after excitation: 1163155793

2016-11-14

  • 8:50am pumps off

Results

2016-11-13 A

% Freq        Q               Q (C.I. 95%)        Q (C.I. 95%)
1098.2        7.4598e+06        7.4472e+06        7.4724e+06
2196.1        8.9864e+06        8.5757e+06        9.4383e+06
2520.2        4.3443e+06        4.3400e+06        4.3486e+06
2558.1        6.0816e+05        6.0143e+05        6.1503e+05
4390.6        2.7832e+06        2.7819e+06        2.7844e+06
6698.1        2.4391e+06        2.4377e+06        2.4404e+06
6720.1        1.2186e+07        1.2174e+07        1.2198e+07
6771.3        1.2193e+06        1.2187e+06        1.2199e+06
6838.3        3.8835e+05        3.8533e+05        3.9143e+05
9434.8        2.0534e+06        2.0501e+06        2.0568e+06
10129.0        1.1046e+05        1.1046e+05        1.1047e+05
10275.4        7.3179e+05        7.2786e+05        7.3576e+05
12589.7        9.8392e+05        9.6718e+05        1.0012e+06
12709.8        3.4484e+05        3.4164e+05        3.4809e+05
14061.9        6.0359e+06        6.0310e+06        6.0408e+06
15955.7        1.8406e+06        1.8350e+06        1.8462e+06
15969.9        7.9895e+06        7.9796e+06        7.9995e+06
16167.0        1.1887e+06        1.1858e+06        1.1916e+06
17933.7        6.7847e+05        6.7845e+05        6.7849e+05
18348.0        1.1646e+06        1.1645e+06        1.1646e+06
18491.0        7.9603e+05        7.9601e+05        7.9605e+05
18658.5        9.0778e+04        9.0775e+04        9.0780e+04
20459.0        1.9219e+06        1.9218e+06        1.9219e+06
21191.2        3.1915e+06        3.1677e+06        3.2157e+06
23383.6        3.5399e+06        3.5198e+06        3.5602e+06
24489.7        9.6402e+05        9.5706e+05        9.7108e+05
24509.4        1.0474e+06        1.0474e+06        1.0474e+06
24553.5        1.4376e+06        1.4375e+06        1.4376e+06
26923.0        7.2079e+06        7.1783e+06        7.2378e+06
28653.0        2.5777e+06        2.5717e+06        2.5838e+06
28747.7        2.2403e+06        2.1968e+06        2.2855e+06
28842.1        1.1938e+07        1.1927e+07        1.1948e+07
29765.5        8.8519e+06        8.7781e+06        8.9269e+06
30712.0        1.6995e+06        1.6848e+06        1.7145e+06
31467.0        4.8235e+05        4.8235e+05        4.8236e+05
31489.0        1.1729e+06        1.1649e+06        1.1809e+06
32120.5        9.6230e+05        9.6229e+05        9.6232e+05

2016-11-13 B

% Freq        Q                Q (C.I. 95%)        Q (C.I. 95%)
1098.1        5.4817e+06        5.4778e+06        5.4856e+06
2520.1        2.7906e+06        2.7896e+06        2.7916e+06
2558.1        6.0809e+05        6.0570e+05        6.1050e+05
4390.6        1.7952e+06        1.7949e+06        1.7955e+06
6698.1        1.4580e+06        1.4576e+06        1.4584e+06
6720.0        8.2579e+06        8.2563e+06        8.2595e+06
6771.4        9.1260e+05        9.1091e+05        9.1429e+05
6838.4        3.8042e+05        3.7936e+05        3.8148e+05
9434.7        1.2099e+06        1.2081e+06        1.2116e+06
10275.5        6.7566e+05        6.7360e+05        6.7773e+05
12589.7        6.8681e+05        6.8318e+05        6.9047e+05
12709.8        2.8213e+05        2.7783e+05        2.8657e+05
14061.9        3.7724e+06        3.7706e+06        3.7741e+06
15955.8        1.2708e+06        1.2636e+06        1.2780e+06
15969.9        5.9870e+06        5.9818e+06        5.9922e+06
16167.0        8.0447e+05        7.9517e+05        8.1399e+05
21191.3        2.7333e+06        2.7051e+06        2.7620e+06
22345.0        2.3568e+06        2.3567e+06        2.3568e+06
23383.5        2.1083e+06        2.1082e+06        2.1083e+06
24489.5        6.6570e+05        6.6569e+05        6.6571e+05
24509.5        7.9636e+05        7.9634e+05        7.9638e+05
24553.5        8.3880e+05        8.3878e+05        8.3881e+05
26922.9        4.6187e+06        4.6004e+06        4.6372e+06
28652.9        1.4483e+06        1.4347e+06        1.4622e+06
28747.6        1.2629e+06        1.2629e+06        1.2629e+06
28842.1        9.5317e+06        9.5238e+06        9.5396e+06
29766.0        6.6922e+06        6.5397e+06        6.8520e+06
30712.1        1.0888e+06        1.0888e+06        1.0888e+06
31489.0        6.8125e+05        6.8124e+05        6.8126e+05
32120.5        7.8667e+05        7.8666e+05        7.8668e+05

2016-11-13 C

% Freq        Q        Q (C.I. 95%)        Q (C.I. 95%)
1098.1        5.4335e+06        5.4304e+06        5.4365e+06
2196.2        6.0782e+06        5.6658e+06        6.5552e+06
2486.0        3.0319e+06        2.6660e+06        3.5141e+06
2515.7        2.7819e+06        2.7810e+06        2.7828e+06
2520.2        2.7871e+06        2.7863e+06        2.7879e+06
2558.0        5.8364e+05        5.7358e+05        5.9405e+05
2578.0        2.7145e+06        2.4935e+06        2.9785e+06
3584.0        2.9087e+06        2.6452e+06        3.2303e+06
4390.5        1.7822e+06        1.7818e+06        1.7825e+06
6698.1        1.4479e+06        1.4472e+06        1.4487e+06
6720.1        8.2604e+06        8.2559e+06        8.2648e+06
6771.3        9.1201e+05        9.1142e+05        9.1260e+05
6838.4        3.8280e+05        3.8172e+05        3.8389e+05
9434.8        1.1975e+06        1.1957e+06        1.1994e+06
10275.4        6.7234e+05        6.7108e+05        6.7360e+05
11358.4        5.5649e+04        5.5646e+04        5.5651e+04
12589.7        6.7443e+05        6.7079e+05        6.7812e+05
12710.0        2.9710e+05        2.8917e+05        3.0549e+05
14061.8        3.7379e+06        3.7343e+06        3.7415e+06
15955.7        1.2690e+06        1.2679e+06        1.2700e+06
15969.9        5.9884e+06        5.9823e+06        5.9945e+06
16167.1        7.7811e+05        7.7118e+05        7.8516e+05
17934.1        4.9574e+05        4.9572e+05        4.9575e+05
18348.0        9.0824e+05        9.0822e+05        9.0827e+05
18491.0        7.8942e+05        7.8940e+05        7.8944e+05
18658.1        8.8711e+04        8.8709e+04        8.8714e+04
21191.1        2.3393e+06        2.3179e+06        2.3612e+06
22345.0        2.2103e+06        2.2103e+06        2.2104e+06
23383.5        2.1953e+06        2.1740e+06        2.2171e+06
24489.6        6.4955e+05        6.4954e+05        6.4956e+05
24553.5        8.6897e+05        8.6896e+05        8.6899e+05
26922.9        4.7003e+06        4.6832e+06        4.7176e+06
28652.9        1.4372e+06        1.4312e+06        1.4433e+06
28747.6        1.2544e+06        1.2440e+06        1.2650e+06
28842.0        9.5549e+06        9.5483e+06        9.5616e+06
29766.0        6.9324e+06        6.7433e+06        7.1325e+06
30712.1        1.1017e+06        1.0911e+06        1.1126e+06
32121.0        8.1697e+05        8.1696e+05        8.1698e+05

 

 

 

Attachment 3: ringdowns.png
ringdowns.png
  182   Sun Nov 13 10:40:16 2016 GabrieleGeneralMeasurementsS1600469

2016-11-13

  • 10:39am in chamber, balanced
  • 10:40am, roughing pump on
  • 10:49am, turbo pump on
  • 1:21pm, excitation (3 kV, 30s), quiet time before 1163107279, quiet time after 1163107415
  • 4:20pm, excitation (3kV, 30s) quiet time before 1163118070, quiet time after 1163118145
  • 6:34pm, pumps off

Results

2016-11-13 A

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
1109.1        1.2009e+07        1.1962e+07        1.2057e+07
2543.6        5.5300e+06        5.5229e+06        5.5371e+06
4429.4        3.5636e+06        3.5626e+06        3.5646e+06
4495.8        1.9892e+05        1.9849e+05        1.9934e+05
6755.9        2.7949e+06        2.7935e+06        2.7963e+06
6769.6        8.0386e+06        8.0366e+06        8.0406e+06
6833.0        2.0677e+06        2.0671e+06        2.0684e+06
9514.3        2.1571e+06        2.1525e+06        2.1617e+06
10205.2        2.2730e+06        2.2706e+06        2.2755e+06
10360.6        2.0024e+06        2.0012e+06        2.0036e+06
12695.7        1.2769e+06        1.2595e+06        1.2947e+06
14168.6        3.4389e+06        3.4347e+06        3.4430e+06
16085.8        7.6129e+06        7.5677e+06        7.6586e+06
16302.1        1.1512e+06        1.1403e+06        1.1623e+06
18632.1        3.4509e+05        3.4508e+05        3.4510e+05
18806.5        8.7268e+05        8.6962e+05        8.7575e+05
20223.4        6.1496e+05        6.1494e+05        6.1498e+05
21351.3        2.9288e+06        2.9173e+06        2.9403e+06
23559.0        3.1627e+06        3.1237e+06        3.2027e+06
23712.0        4.2045e+05        4.2045e+05        4.2046e+05
24212.1        1.2451e+06        1.2451e+06        1.2451e+06
24687.7        1.1293e+06        1.1293e+06        1.1293e+06
25352.0        3.2923e+06        3.2922e+06        3.2923e+06
27127.4        9.1114e+06        8.9219e+06        9.3091e+06
28854.0        3.0897e+06        3.0269e+06        3.1552e+06
28952.0        2.6625e+06        2.6624e+06        2.6625e+06
29052.0        7.2887e+06        7.0946e+06        7.4937e+06
29523.0        5.4690e+05        5.4689e+05        5.4691e+05
32122.0        1.8145e+06        1.8145e+06        1.8146e+06

2016-11-13 B

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
1130.0        1.7017e+06        1.6756e+06        1.7287e+06
2543.6        5.1969e+06        5.1941e+06        5.1998e+06
4429.4        3.7969e+06        3.7957e+06        3.7980e+06
4495.8        2.0313e+05        2.0241e+05        2.0386e+05
6755.9        2.8919e+06        2.8893e+06        2.8945e+06
6769.6        8.0715e+06        8.0699e+06        8.0730e+06
6833.0        2.1233e+06        2.1227e+06        2.1239e+06
9514.4        2.2500e+06        2.2489e+06        2.2512e+06
10205.3        2.4315e+06        2.4298e+06        2.4332e+06
10360.6        2.2703e+06        2.2641e+06        2.2766e+06
12695.8        1.3177e+06        1.3105e+06        1.3250e+06
14168.6        1.5517e+06        1.5485e+06        1.5549e+06
16074.0        1.1441e+06        1.1441e+06        1.1442e+06
16085.8        7.5344e+06        7.5003e+06        7.5688e+06
16302.1        1.1328e+06        1.1262e+06        1.1394e+06
17549.4        7.2792e+05        7.2790e+05        7.2794e+05
18632.4        4.3522e+05        4.3520e+05        4.3523e+05
18806.6        9.4602e+05        9.4289e+05        9.4916e+05
20144.0        1.3355e+06        1.3355e+06        1.3356e+06
20280.5        2.6059e+05        2.6058e+05        2.6060e+05
21351.0        2.7260e+06        2.7259e+06        2.7261e+06
23559.0        4.1056e+06        3.9740e+06        4.2461e+06
23711.6        4.0080e+05        4.0079e+05        4.0081e+05
24212.0        1.1849e+06        1.1849e+06        1.1849e+06
24687.7        9.9194e+05        9.9192e+05        9.9196e+05
28854.3        3.1246e+06        3.1246e+06        3.1247e+06
28952.0        2.4117e+06        2.4116e+06        2.4117e+06
29052.3        6.6583e+06        6.6582e+06        6.6585e+06

 

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