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  Coating Ring-down Measurement Lab elog  Not logged in ELOG logo
Message ID: 163     Entry time: Sun Nov 6 10:14:51 2016
Author: Gabriele 
Type: General 
Category: Measurements 
Subject: S1600456 

2016-11-06

  • 10:12am: installed in chamber, balanced
  • 10:14am: roughing pump on
  • 10:22am: turbo pump on
  • 12:40pm: excitation:
    • quiet before excitation 1162501864+30
    • quiet after excitation 1162501946+30
  • 4pm excitation
    • Quiet time before excitation: 1162512830
      Excitation at 1162512873 (20 s)
      Excitation finished
      Quiet time after excitation: 1162512893

  • 6:05pm: In both ringdowns the first mode at 1 kHz wasn't properly excited. I moved the laser beam on a different spot. Using brodband noise I still couldn't get it to ring up. So I injected bandlimited noise 1000-1200 Hz with amplitude of 10000. Mode are up.
    Quiet time after injection from 1162519598

  • 8:07pm, again band-limited excitation, quiet time after 1162526818

2016-11-07

  • 8:39am: pumps off

Results

2016-11-05 A

 

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
2509.1        4.0579e+06        4.0553e+06        4.0606e+06
2549.8        8.5490e+05        8.4709e+05        8.6286e+05
4370.0        1.6497e+06        1.6492e+06        1.6501e+06
4437.0        2.2329e+05        2.2310e+05        2.2347e+05
6666.4        2.6788e+06        2.6756e+06        2.6819e+06
6680.0        7.6174e+06        7.6026e+06        7.6322e+06
6743.0        1.8669e+06        1.8664e+06        1.8673e+06
6807.3        2.9358e+05        2.9335e+05        2.9382e+05
9389.2        2.3737e+06        2.3726e+06        2.3748e+06
10070.3        8.5206e+05        8.5202e+05        8.5211e+05
10225.0        6.2779e+05        6.2776e+05        6.2782e+05
12529.9        1.3218e+06        1.3217e+06        1.3218e+06
13983.0        1.5269e+06        1.5269e+06        1.5270e+06
15863.5        1.8321e+06        1.8320e+06        1.8321e+06
15875.4        5.0350e+06        5.0348e+06        5.0351e+06
16091.5        1.0913e+06        1.0912e+06        1.0913e+06
18389.0        5.3468e+06        5.3357e+06        5.3580e+06
21074.0        3.7649e+06        3.7648e+06        3.7650e+06
23252.3        3.0067e+06        2.9999e+06        3.0135e+06
24371.4        1.2491e+06        1.2490e+06        1.2491e+06
26778.6        2.5593e+06        2.5592e+06        2.5593e+06
28482.4        2.6427e+06        2.6426e+06        2.6427e+06
28579.0        1.8244e+06        1.8244e+06        1.8245e+06
28678.4        6.4318e+06        6.4317e+06        6.4319e+06
31701.4        1.3385e+06        1.3384e+06        1.3385e+06

2019-11-06 B

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
2509.0        4.3643e+06        4.3445e+06        4.3843e+06
4370.1        2.0745e+06        2.0560e+06        2.0935e+06
4437.0        3.5763e+05        3.4927e+05        3.6641e+05
6666.5        2.8583e+06        2.8327e+06        2.8845e+06
6680.0        9.7911e+06        9.7594e+06        9.8230e+06
6743.0        1.9479e+06        1.9265e+06        1.9698e+06
6807.3        5.0716e+05        4.9331e+05        5.2179e+05
9389.2        2.6386e+06        2.6104e+06        2.6675e+06
10070.3        1.0634e+06        1.0633e+06        1.0634e+06
10225.1        1.0434e+06        1.0433e+06        1.0434e+06
12529.9        1.6029e+06        1.5749e+06        1.6318e+06
13983.3        2.7379e+06        2.7016e+06        2.7751e+06
15863.7        2.2082e+06        2.2082e+06        2.2083e+06
15875.4        3.2435e+06        3.2434e+06        3.2436e+06
23252.2        3.6506e+06        3.6505e+06        3.6507e+06
24371.5        2.0111e+06        2.0110e+06        2.0111e+06
26779.0        2.1974e+05        2.1973e+05        2.1974e+05
28579.1        2.7341e+06        2.7341e+06        2.7342e+06
28679.0        6.2394e+06        6.2393e+06        6.2395e+06
31701.0        2.2893e+06        2.2893e+06        2.2893e+06

2016-11-06 First mode

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
1094.0        1.0221e+07        1.0194e+07        1.0249e+07
1115.0        1.5958e+06        1.5885e+06        1.6031e+06

 

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