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ID Date Author Typeup Category Subject Text Attachments
  14097   Sun Jul 22 14:01:07 2018 poojaUpdateCamerasDeveloping neural networks on simulated videoAim: To develop a neural
network that resolves mirror motion from
 nn_simulation_2_normalized_mult_sin_nodes8_128epochs_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdfnn_simulation_normalizedtarget_128epochs_mult_sin_load_wt_varyingtest_nodes8_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdfnn_simulation_2_normalized_varying_mult_sin_nodes8_128epochs_lr0p00001_beta1_0p8_beta2_0p85_0p4train_0p1valid_marked.pdf 
  14100   Tue Jul 24 06:11:50 2018 ranaUpdateCamerasDeveloping neural networks on simulated videoThis looks like good progress. Instead
of fixed sines or random noise, you should
generate now a time series for the motion
  
  14101   Tue Jul 24 09:47:51 2018 gautamUpdateCamerasDeveloping neural networks on simulated videoI was thinking a little more about the
way we are training the network for the current
topology - because the network has no recurrent
  
  14105   Thu Jul 26 01:52:01 2018 terraUpdateThermal Compensationheater work updateJust a quick update: over the past few
days we've taken (at least) 5 scans around
each peak [carrier - HOM3] at 9.4V/0.8A,
 OpLev_thermal_drift.pdfhotColdAll.pdf 
  14106   Thu Jul 26 15:11:18 2018 SteveUpdateGeneral Viewports & coating of 2001New optical quality BK-7 windows in 2001
[4 substrates ] AR coated R<0.75 % for
630-1064nm "
 BK7window_Coatings.PDF 
  14107   Fri Jul 27 02:30:51 2018 gautamUpdateGeneralGlitchy MCKevin and I saw some weird IMC / PEM BLRMS
behaviour today - see Attached screenshot.
Not sure what was happening with the IMC,
 38.png 
  14108   Fri Jul 27 10:48:57 2018 SteveUpdateSUSBS oplev windowYesterday I inspected this BS oplev viewport.
The heavy connector tube was shorting to
table so It was moved back towards the chamber.
 BSOw_.jpgdustInsideBSO.jpg 
  14109   Fri Jul 27 17:16:14 2018 SandrineUpdateThermal CompensationCopied working scripts for mode spectroscopy into new directory (modeSpec)The scripts: AGfast.py, make HDF5.py, plotSpec_marconi.py,
and SandrineFitv3.py were copied into the
new directory modeSpec.
  
  14111   Sat Jul 28 22:16:49 2018 John MartynUpdate Characterization of Transimpedance AmplifierKevin and I meaured the transfer function
of the photodiode circuit using the Jenne
laser and agilent in the 40m lab. The attached
 PD_TF1.pdfPD_TF2.pdfPD_and_TIA_Transfer_Function_Measurements.zip 
  14112   Sun Jul 29 00:59:54 2018 KojiUpdateElectronicsCharacterization of Transimpedance AmplifierYou have this measurement problem when
the IF bandwidth is larger than the measurement
frequency. I suspect the IF bandwidth is
  
  14113   Sun Jul 29 20:03:02 2018 ranaUpdatePEMSeismometer temp controlWhile Shruti is re-building Kira's
heater circuit, I looked up how to do one
of these (i.e. what does a real EE say about
 Screen_Shot_2018-07-29_at_8.00.27_PM.png 
  14114   Sun Jul 29 23:15:34 2018 poojaUpdateCamerasDeveloping CNNAim: To develop a convolutional
neural network that resolves mirror motion
 conv_nn_varying_freq_amp_1.pdfconv_nn_varying_freq_amp_2.pdf 
  14115   Mon Jul 30 11:05:44 2018 gautamUpdateSUSIFO SUS wonkyWhen I came in this morning:


PMC was unlocked.
Seis
BLRMS were off scale.
ITMX OSEM
 IMG_7102.JPG 
  14117   Mon Jul 30 16:11:54 2018 gautamUpdateSUSTrillium interface box is broken[koji,
steve, gautam]
  
  14118   Mon Jul 30 18:19:03 2018 KojiUpdateSUSTrillium interface box was fixed and reinstalledThe trillium interface box was removed
from the rack.

The
 P_20180730_173134.jpgP_20180730_180151.jpg 
  14119   Tue Jul 31 08:17:55 2018 SteveUpdateSUSTrillium interface box was fixed,reinstalled & working 

 
 all_OK.png 
  14120   Tue Jul 31 22:50:18 2018 aaronUpdateOMCOMC Expected Refl SignalI learned a lot about lasers this week
from Siegman. Here are some plots that show
the expected reflectivity off of the OMC
 omcRefl.pdf 
  14124   Thu Aug 2 16:30:08 2018 SteveUpdateTreasuretime capsule locationI 've just found this time capsule
note from Nov. 26, 2000 by Kip Thorne: 
LIGO will discover gravitational waves by
 time_capsule.JPG 
  14129   Fri Aug 3 15:53:25 2018 gautamUpdateSUSLow noise bias path ideaSummary:

The idea we are going with to push
the coil driver noise contribution down is
 LT1055_precOpAmp.pdf 
  14130   Fri Aug 3 16:27:40 2018 ranaUpdateSUSLow noise bias path ideaBah! Too complex.   
  14131   Fri Aug 3 18:54:58 2018 gautamUpdateSUSGlitchy MC1The wall StripTool indicated that the IMC
wasn't too happy when I came in today.
Specifically:
 MC1_sensorAnomaly.png 
  14132   Fri Aug 3 19:02:11 2018 gautamUpdateASSX arm ASS recovery[koji,
gautam]

After I effected the series resistance
  
  14133   Sun Aug 5 13:28:43 2018 gautamUpdateCDSc1lsc flakySince the lab-wide
computer shutdown last Wednesday, all
the realtime models running on c1lsc have
  
  14134   Sun Aug 5 13:45:00 2018 gautamUpdateSUSETMX trippedIndependent from the problems the vertex
machine has been having (I think, unless
it's something happening over the shared
 ETMX_tripped.pngETMX_tripped_zoom.png 
  14135   Sun Aug 5 15:43:50 2018 gautamUpdateSUSAnother low noise bias path ideaOK, how about this:


Attachment
 HV_Bias_schematic.pdfTF.pdfbias.pdfHVbias_currentNoise.pdf 
  14136   Mon Aug 6 00:26:21 2018 gautamUpdateCDSMore CDS woesI spent most of today fighting various
CDS errors.


I rebooted c1lsc around
 CDSoverview.png 
  14137   Mon Aug 6 09:34:02 2018 SteveUpdateVACRGA scan at day 20 

 
 pd81d20.png 
  14139   Mon Aug 6 14:38:38 2018 gautamUpdateCDSMore CDS woesStability was short-lived it seems. When
I came in this morning, all models on c1lsc
were dead already, and now c1sus is also
 CDScrash.pngMC1failures.png 
  14140   Mon Aug 6 19:49:09 2018 gautamUpdateCDSMore CDS woesI've left
the c1lsc frontend shutdown for now,
 IMG_7106.JPG 
  14141   Mon Aug 6 20:41:10 2018 aaronUpdateDAQNew DAC for the OMCGautam and I tested out the DAC that he
installed in the latter half of last week.
We confirmed that at least one of the channels
 OMCDACmdl.png 
  14142   Tue Aug 7 11:30:46 2018 gautamUpdateCDSMore CDS woesOvernight, all models on c1sus and c1ioo
seem to have had no stability issues, supporting
the hypothesis that timing issues stem from
  
  14143   Tue Aug 7 22:28:23 2018 gautamUpdateCDSMore CDS woesI am starting the c1x04 model (IOP) on
c1lsc to see how it behaves overnight.

Well, there was apparently an immediate
  
  14144   Tue Aug 7 23:06:30 2018 KojiUpdatePSLEOM measuement preparationI was preparing for the aLIGO EOM measuement
to be carried out tomorrow afternoon.

I did a few modifications to the
  
  14145   Wed Aug 8 20:56:11 2018 KojiUpdatePSLEOM measuement preparationRich and I worked on the EOM measurement.
After the measurement, the setup was reverted
to the nominal state
  
  14146   Wed Aug 8 23:03:42 2018 gautamUpdateCDSc1lsc model startedAs part of this slow but systematic debugging,
I am turning on the c1lsc model overnight
to see if the model crashes return.
  
  14147   Wed Aug 8 23:06:59 2018 gautamUpdateSUSAnother low noise bias path ideaToday while Rich Abbott was here, Koji
and I had a brief discussion with him about
the HV amplifier idea for the coil driver
  
  14148   Thu Aug 9 02:12:13 2018 gautamUpdateCOCSouth East or West?Summary:

For operating the SRC in the "Signal-Recycled"
tuning, the SRC macroscopic length needs
  
  14149   Thu Aug 9 12:31:13 2018 gautamUpdateCDSCDS status updateThe model seems to have run without issues
overnight. Not completely related, but the
MC1 shadow sensor signals also don't
  
  14150   Thu Aug 9 12:40:14 2018 gautamUpdateSUSETMX trip follow-upA brief follow-up on this since we discussed
this at the meeting yesterday: the attached
DV screenshot shows the full 2k data for
 ETMXglitch.png 
  14151   Thu Aug 9 22:50:13 2018 gautamUpdateCDSAlignSoft script modifiedAfter this
work of increasing the series resistance
on ETMX, there have been numerous occassions
 MichelsonFringing.png 
  14152   Fri Aug 10 01:10:56 2018 gautamUpdateLSCSome vertex locking restoredFor
the first time after the whirlwind vent,
 PRMIcarrier.png 
  14156   Mon Aug 13 09:56:23 2018 SteveUpdateSUSETMX trip follow-upHere is an other big one




 ETMXglitch.pngETMXgltch.png 
  14157   Mon Aug 13 11:44:32 2018 gautamUpdateComputer Scripts / ProgramsPatch updates on nodusLarry W said that some security issues
were flagged on nodus. So I ran

  
  14159   Mon Aug 13 20:21:10 2018 aaronUpdateOMCNew DAC for the OMC[aaron, gautam]

We finished up making the new c1omc
model  (screenshot attached).
 c1omcSCREENSHOT.png 
  14160   Tue Aug 14 00:27:55 2018 gautamUpdateLSCLocking prepIn preparation for attempting some DRMI
locking, I did the following:


Slow machine reboots for
  
  14161   Tue Aug 14 00:50:32 2018 gautamUpdateASSX arm ASS still not quite right?While working on the single arm alignment,
I noticed that today, i was able to get the
X arm transmission back to ~1.22, and the
 POXPOY.pngIMG_7108.JPG 
  14162   Tue Aug 14 02:01:12 2018 gautamUpdateLSCDRMI locking - partial successAfter tweaking the AS55 demod phase, SRM
alignment, triggering settings, I got a few
brief
 DRMI.png 
  14163   Tue Aug 14 23:14:24 2018 aaronUpdateOMCOMC scanning/aligning scriptI made a script to scan the OMC length
at each setpoint for the two TTs steering
into the OMC. It is currently located on
  
  14164   Wed Aug 15 12:15:24 2018 gautamUpdateCOCMacroscopic SRC length for SR tuningSummary:

It
 SRC_MCMC_shortTerm.pdfSRC_dists_shortTerm.pdf 
  14165   Wed Aug 15 19:18:07 2018 gautamUpdateSUSAnother low noise bias path ideaI took another pass at this. Here is what
I have now:

Attachment
 HV_Bias.pdfHVamp_TF.pdfHVamp_noises.pdfcurrentNoises.pdfHVamp.fil.zip 
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