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ID Date Author Typedown Category Subject Text Attachments
  87   Tue Aug 16 11:57:03 2016 GabrieleElectronicsConfigurationFixed cymac3 network and time issueThe 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 GabrieleElectronicsConfigurationEpics values now saved to framesI 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 GabrieleElectronicsConfigurationEpics values now saved to framesNow 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 GabrieleElectronicsConfigurationEpics values now saved to framesApparently, 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 GabrieleElectronicsConfigurationRemoved low pass filter in SUMI removed the low pass filter in the QPD
SUM signal, used for normalization. This
reduced a lot the bump at ~20kHz due to laser
 Screenshot.png 
  157   Fri Nov 4 08:13:25 2016 GabrieleElectronicsGeneralPower 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 GabrieleElectronicsConfigurationAutocenter control and model modificationsRemoved the peak meter lock from the model,
since it's not used

Added and EPICS binary bit to control
 Screenshot-Untitled_Window.png 
  173   Thu Nov 10 14:13:34 2016 gabrieleElectronicsConfigurationMATLAB code to control Thorlabs stagesTo be used to automate the laser polishing.  move_complete.mthrolabs_activex.manimation.mdraw_wafer.m 
  207   Tue Nov 22 08:21:35 2016 GabrieleElectronicsCharacterizationADC saturationLast 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 GabrieleElectronicsConfigurationChanged whitening filters of four more boardsI modified four more QPD boards to implement
the new whitening filters detailed in elog 207.
  
  224   Mon Dec 5 10:39:16 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueFor 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 GabrieleElectronicsGeneralHigh voltage relaisWe want to be able to drive any combination
of the four samples in the new setup, by
using only one HV amplifier.
 2016-12-05_16.06.51.jpg2016-12-05_16.18.56.jpg2016-12-05_16.18.49.jpg 
  227   Tue Dec 6 09:02:17 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueThings 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 GabrieleElectronicsConfigurationTrying to debug GPS time issueUPDATE:

Now the time difference is about
30 seconds. It seems that the real time model
 Screenshot.pnggps_time_offset.png 
  229   Tue Dec 6 11:22:58 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueI swapped the SR signal generator with
an Agilent 33210A. Shut down and restarted
the cymac3. Now the command line GPS and
 Screenshot-3.png 
  231   Tue Dec 6 16:55:51 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueUpdate at 5pm, GPS times are still in sync.

 Screenshot.png 
  232   Wed Dec 7 08:14:05 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueUnfortunately, this morning the model time
is again wrong...

 Screenshot-1.png 
  233   Wed Dec 7 08:48:13 2016 GabrieleElectronicsConfigurationAuto center state written directly to dataI 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 GabrieleElectronicsConfigurationTrying to debug GPS time issueI 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 GabrieleElectronicsConfigurationTrying to debug GPS time issueFor the last ~day the difference between
the frontend GPS time and the machine GPS
time remained constant between -1 and -2
 figure_1.pngfigure_1.png 
  237   Thu Dec 8 15:32:04 2016 GabrieleElectronicsConfigurationTiming 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 GabrieleElectronicsConfigurationTiming 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,
 dac_spectra.png 
  244   Sat Dec 17 06:29:15 2016 ranaElectronicsConfigurationTiming 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 GabrieleElectronicsConfigurationReal 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 GabrieleElectronicsConfigurationAdded ESD bias path to model CR0I added to the model CR0 an additional
bias path for the ESD driver:

 Screenshot.pngScreenshot-Untitled_Window.png 
  275   Tue Jan 24 11:45:55 2017 GabrieleElectronicsConfigurationPicomotor 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 GabrieleElectronicsDaily ProgressHigh voltage system in placeThis 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 GabrieleElectronicsConfigurationAuto centering script for the new setupI 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, LarryElectronicsConfigurationPrivate networkThis 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 GabrieleElectronicsConfigurationRemoved ESD bias path to model CR0Removed, since iit was not useful to improve
the actuation authority.

  
  299   Thu Feb 9 09:10:17 2017 Gabriele, LarryElectronicsConfigurationPrivate networkI 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 GabrieleElectronicsConfigurationSoftware 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 ZachElectronicsModelingBeginning with COMSOL2017-06-21


4:30 pm-
Installed COMSOL, began modeling current
ESD by creating parameters and the first
  
  352   Thu Jun 22 15:37:20 2017 ZachElectronicsModelingBeginning modeling2017-06-22


Created
the geometry of the ESD by creating blocks
and joining them with Unions. I then created
 E_Plot.png 
  353   Fri Jun 23 12:02:12 2017 ZachElectronicsModelingPlots2017-06-23


I created
plots of the E field and potential from my
rough model of the ESD. This model has 1mm
 Potential.pngE_w_Lines.pngMesh.png 
  356   Tue Jun 27 14:17:47 2017 ZachElectronicsModelingFurther plots and improving models2017-06-27


I built
a new model of the ESD to determine whether
or not the spikes in the electric field at
 E_field_corner.pngE_field_round.png 
  359   Thu Jun 29 16:40:41 2017 ZachElectronicsModelingAccurate model and force profile2017-06-29


I created
a much more accurate model of the current
ESD setup from the technical drawings. My
 Force.pnggeometry.pngMesh.png 
  360   Fri Jun 30 11:02:18 2017 ZachElectronicsModelingMatching Forces2017-06-30


I adjusted
the plot parameters slightly so that it only
showed the actual force profile on the sample
 ForceE.pngForceP.png 
  361   Fri Jun 30 16:27:56 2017 ZachElectronicsModelingDouble Checking Model2017-06-30


In order
to confirm the accuracy of my model I checked
some easily computable quantities between
  
  363   Wed Jul 5 12:01:51 2017 ZachElectronicsModelingForce plots-Correct plots, force issue2017-07-05


I sorted
out my mathematical lapse in logic and computed
the correct force profiles in the perpendicular
 Force_E2.pngForce_PE.png 
  364   Wed Jul 5 16:40:51 2017 ZachElectronicsModelingForce disparity-improvement2017-07-05


In order
to improve my data I shrunk the region of
the finer meshing slightly and made the mesh
 1ForceE2.png1ForcePE.png 
  365   Thu Jul 6 12:08:35 2017 ZachElectronicsModelingChecking physical parameters2017-07-06


I compared
the electric field and the polarization to
make sure that those calculations made sense.
 E_from_P.pngE_from_E.png 
  366   Thu Jul 6 12:48:54 2017 ZachElectronicsModelingResolving the factor of two2017-07-06

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 ZachElectronicsModelingModel of actuator and sample2017-07-12


I am attaching
the first fully functioning model of the
actuator and sample. I cleared both meshes
 Force_Model.mph 
  368   Fri Jul 14 16:43:24 2017 ZachElectronicsModelingForce profile matlab script2017-07-14


I have completed
a rough, but functioning script that calculates
the modal force profiles. The force values
 forces.mfaster.m 
  371   Thu Jul 20 11:37:01 2017 ZachElectronicsModelingMatlab Script2017-07-20


I believe
my MATLAB script successfully calculates
the force distribution into each of the modes
 forces.m 
  375   Mon Jul 24 09:13:45 2017 ZachElectronicsModelingParametric Sweep2017-07-24


I wrote
a MATLAB script that is capable of sweeping
parameters, the code is attached. The next
 gap_plot.jpgforcesweep.m 
  378   Tue Jul 25 13:38:30 2017 ZachElectronicsModelingParametric Sweep of ESD gap2017-07-25


I completed
a short sweep of the gap between the drive
and the sample, between .5 and 1 mm in .1
 modeplotESDgap.jpg 
  379   Wed Jul 26 09:27:40 2017 ZachElectronicsModelingSweeping the space between ESD and sample2017-07-26


I ran a
sweep of the gap between the ESD and the
sample, first from .5 mm to 1 mm. That sweep
 Gap_near_one.jpggap_sweep.jpgGap_near_one.jpg 
  381   Wed Jul 26 21:22:50 2017 ZachElectronicsModelingParametric Sweep Results2017-07-26


I resolved
the major bugs in the parametric sweep scripts
and ran low resolution sweeps of the gap
 ESD.armgap.jpgESD.sample.gap.jpg 
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