| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
87
|
Tue Aug 16 11:57:03 2016 |
Gabriele | Electronics | Configuration | Fixed cymac3 network and time issue | The cymac3 internal clock was off by about
10 seconds. When I tried to start the NTP
service, I found out that the cymac3 couldn't |
|
|
123
|
Thu Sep 22 15:00:49 2016 |
Gabriele | Electronics | Configuration | Epics values now saved to frames | I was looking at some past trend data and
discovered that EPICS values were not written
to the frames. I added the following two |
|
|
125
|
Fri Sep 23 08:33:39 2016 |
Gabriele | Electronics | Configuration | Epics values now saved to frames | Now EPICS values are saved to frames, but
they are all zero! I noticed that we always
had the same problems with the cymac2 too. |
|
|
129
|
Tue Sep 27 14:54:53 2016 |
Gabriele | Electronics | Configuration | Epics values now saved to frames | Apparently, there was a mismatch in the
configuration, and DAQD was adding a wonderful
16 Hz comb all over the spectrum. |
|
|
143
|
Fri Oct 21 15:27:15 2016 |
Gabriele | Electronics | Configuration | Removed low pass filter in SUM | I removed the low pass filter in the QPD
SUM signal, used for normalization. This
reduced a lot the bump at ~20kHz due to laser |
|
|
157
|
Fri Nov 4 08:13:25 2016 |
Gabriele | Electronics | General | Power outage? | This morning I found the cymac and the
workstation rebooted, so I suspected a power
cut in the last days. However, the function |
|
|
158
|
Fri Nov 4 11:31:11 2016 |
Gabriele | Electronics | Configuration | Autocenter control and model modifications | Removed the peak meter lock from the model,
since it's not used
Added and EPICS binary bit to control |
|
|
173
|
Thu Nov 10 14:13:34 2016 |
gabriele | Electronics | Configuration | MATLAB code to control Thorlabs stages | To be used to automate the laser polishing. |
|
|
207
|
Tue Nov 22 08:21:35 2016 |
Gabriele | Electronics | Characterization | ADC saturation | Last night measurements didn't work
well: even without exciting the modes, the
ADC was saturating because of the low frequency |
10x |
|
217
|
Tue Nov 29 17:06:13 2016 |
Gabriele | Electronics | Configuration | Changed whitening filters of four more boards | I modified four more QPD boards to implement
the new whitening filters detailed in elog 207. |
|
|
224
|
Mon Dec 5 10:39:16 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | For a long time I had problems with the
GPS time in frames being different from the
real one. |
|
|
226
|
Mon Dec 5 16:35:05 2016 |
Gabriele | Electronics | General | High 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. |
|
|
227
|
Tue Dec 6 09:02:17 2016 |
Gabriele | Electronics | Configuration | Trying 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 |
|
|
228
|
Tue Dec 6 10:38:19 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | UPDATE:
Now the time difference is about
30 seconds. It seems that the real time model |
|
|
229
|
Tue Dec 6 11:22:58 2016 |
Gabriele | Electronics | Configuration | Trying 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 |
|
|
231
|
Tue Dec 6 16:55:51 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | Update at 5pm, GPS times are still in sync.
|
|
|
232
|
Wed Dec 7 08:14:05 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | Unfortunately, this morning the model time
is again wrong...
|
|
|
233
|
Wed Dec 7 08:48:13 2016 |
Gabriele | Electronics | Configuration | Auto center state written directly to data | I modified the autocenter script. Now while
the picomotor is moving, the variable X3:CR1-AUTOCENTER
takes the value 1, otherwise it is 0. |
|
|
235
|
Wed Dec 7 16:27:11 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | I put back the Stanford Reserch signal
generator. On a scope, the timing signal
looks good. There is a small ripple and some |
|
|
236
|
Thu Dec 8 09:26:10 2016 |
Gabriele | Electronics | Configuration | Trying to debug GPS time issue | For the last ~day the difference between
the frontend GPS time and the machine GPS
time remained constant between -1 and -2 |
|
|
237
|
Thu Dec 8 15:32:04 2016 |
Gabriele | Electronics | Configuration | Timing issue: is it a DAC issue? | My previous
test showed that the timing drift was
somehow related to the output of the signal |
6x |
|
240
|
Mon Dec 12 14:15:53 2016 |
Gabriele | Electronics | Configuration | Timing issue: is it a DAC issue? | I swapped the DAC with another one, but
I see the same behavior in the output signal.
Here's a spectrum of the DAC output, |
|
|
244
|
Sat Dec 17 06:29:15 2016 |
rana | Electronics | Configuration | Timing issue: is it a DAC issue? | I find sometimes that the probe configuration
can give these distorted signals. For the
Tektronix probes, its best to use a 500 MHz |
|
|
254
|
Wed Jan 4 14:28:03 2017 |
Gabriele | Electronics | Configuration | Real time models for new measurement system |
changed the name of the test chamber
real time model from CR1 to CR0. Updated
all MEDM screens and scripts (autocenter.py, |
|
|
261
|
Thu Jan 12 10:36:47 2017 |
Gabriele | Electronics | Configuration | Added ESD bias path to model CR0 | I added to the model CR0 an additional
bias path for the ESD driver:
|
|
|
275
|
Tue Jan 24 11:45:55 2017 |
Gabriele | Electronics | Configuration | Picomotor drivers |
Changed the library Picomotor8752.py
to add a third axis 'r' that
will allow moving the in-vacuum retaining |
|
|
276
|
Wed Jan 25 10:02:23 2017 |
Gabriele | Electronics | Daily Progress | High voltage system in place | This morning I installed in the clean room
the high voltage amplifier and the high voltage
relays. Everything is cabled as planned. |
|
|
283
|
Tue Jan 31 09:03:12 2017 |
Gabriele | Electronics | Configuration | Auto centering script for the new setup | I wrote an autocenter script for the four
QPD in the new setup (autocenter14.py) and
renamed the script for the old chamber (autocenter0.py). |
|
|
297
|
Wed Feb 8 17:06:11 2017 |
Gabriele, Larry | Electronics | Configuration | Private network | This morning Larry set up a network switch
to create a local network for the power strip
and the two Newport picomotor controllers. |
|
|
298
|
Thu Feb 9 08:35:24 2017 |
Gabriele | Electronics | Configuration | Removed ESD bias path to model CR0 | Removed, since iit was not useful to improve
the actuation authority.
|
|
|
299
|
Thu Feb 9 09:10:17 2017 |
Gabriele, Larry | Electronics | Configuration | Private network | I reconfigured the powerstrip and the two
Newport controllers to use static IP address
in the new 10.10.10.X network, using the |
|
|
314
|
Wed Feb 22 13:56:15 2017 |
Gabriele | Electronics | Configuration | Software improvements |
created a single interface to move
the picomotors in front of QPD1 ... QPD4
the
command qpdcenter |
|
|
351
|
Thu Jun 22 13:16:37 2017 |
Zach | Electronics | Modeling | Beginning with COMSOL | 2017-06-21
4:30 pm-
Installed COMSOL, began modeling current
ESD by creating parameters and the first |
|
|
352
|
Thu Jun 22 15:37:20 2017 |
Zach | Electronics | Modeling | Beginning modeling | 2017-06-22
Created
the geometry of the ESD by creating blocks
and joining them with Unions. I then created |
|
|
353
|
Fri Jun 23 12:02:12 2017 |
Zach | Electronics | Modeling | Plots | 2017-06-23
I created
plots of the E field and potential from my
rough model of the ESD. This model has 1mm |
|
|
356
|
Tue Jun 27 14:17:47 2017 |
Zach | Electronics | Modeling | Further plots and improving models | 2017-06-27
I built
a new model of the ESD to determine whether
or not the spikes in the electric field at |
|
|
359
|
Thu Jun 29 16:40:41 2017 |
Zach | Electronics | Modeling | Accurate model and force profile | 2017-06-29
I created
a much more accurate model of the current
ESD setup from the technical drawings. My |
|
|
360
|
Fri Jun 30 11:02:18 2017 |
Zach | Electronics | Modeling | Matching Forces | 2017-06-30
I adjusted
the plot parameters slightly so that it only
showed the actual force profile on the sample |
|
|
361
|
Fri Jun 30 16:27:56 2017 |
Zach | Electronics | Modeling | Double Checking Model | 2017-06-30
In order
to confirm the accuracy of my model I checked
some easily computable quantities between |
|
|
363
|
Wed Jul 5 12:01:51 2017 |
Zach | Electronics | Modeling | Force plots-Correct plots, force issue | 2017-07-05
I sorted
out my mathematical lapse in logic and computed
the correct force profiles in the perpendicular |
|
|
364
|
Wed Jul 5 16:40:51 2017 |
Zach | Electronics | Modeling | Force disparity-improvement | 2017-07-05
In order
to improve my data I shrunk the region of
the finer meshing slightly and made the mesh |
|
|
365
|
Thu Jul 6 12:08:35 2017 |
Zach | Electronics | Modeling | Checking physical parameters | 2017-07-06
I compared
the electric field and the polarization to
make sure that those calculations made sense. |
|
|
366
|
Thu Jul 6 12:48:54 2017 |
Zach | Electronics | Modeling | Resolving the factor of two | 2017-07-06
I resolved the factor
of two from Griffiths' discussion of
dipoles in non-uniform electric fields. The |
|
|
367
|
Wed Jul 12 15:08:59 2017 |
Zach | Electronics | Modeling | Model of actuator and sample | 2017-07-12
I am attaching
the first fully functioning model of the
actuator and sample. I cleared both meshes |
|
|
368
|
Fri Jul 14 16:43:24 2017 |
Zach | Electronics | Modeling | Force profile matlab script | 2017-07-14
I have completed
a rough, but functioning script that calculates
the modal force profiles. The force values |
|
|
371
|
Thu Jul 20 11:37:01 2017 |
Zach | Electronics | Modeling | Matlab Script | 2017-07-20
I believe
my MATLAB script successfully calculates
the force distribution into each of the modes |
|
|
375
|
Mon Jul 24 09:13:45 2017 |
Zach | Electronics | Modeling | Parametric Sweep | 2017-07-24
I wrote
a MATLAB script that is capable of sweeping
parameters, the code is attached. The next |
|
|
378
|
Tue Jul 25 13:38:30 2017 |
Zach | Electronics | Modeling | Parametric Sweep of ESD gap | 2017-07-25
I completed
a short sweep of the gap between the drive
and the sample, between .5 and 1 mm in .1 |
|
|
379
|
Wed Jul 26 09:27:40 2017 |
Zach | Electronics | Modeling | Sweeping the space between ESD and sample | 2017-07-26
I ran a
sweep of the gap between the ESD and the
sample, first from .5 mm to 1 mm. That sweep |
|
|
381
|
Wed Jul 26 21:22:50 2017 |
Zach | Electronics | Modeling | Parametric Sweep Results | 2017-07-26
I resolved
the major bugs in the parametric sweep scripts
and ran low resolution sweeps of the gap |
|