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ID Date Authorup Type Category Subject Text Attachments
  16565   Mon Jan 10 17:04:47 2022 AnchalUpdateBHDAS1 Sat Amp CH2 had offsetWe found that there was a small offset
(~300 mV) at TP6 and TP8, in PD2 circuit
(CH2 of the board). I replaced U3 AD822ARZ
  
  16566   Mon Jan 10 18:20:45 2022 AnchalUpdateBHDTested 2" PR2 candidates transmissionI tested 2 more optics found by Paco and
Yehonathan in QIL.

  
  16567   Mon Jan 10 18:36:41 2022 AnchalSummaryBHDLO1 free swinging test set to triggerLO1 is set to go through a free swinging
test at 1 am tonight. We have used this script
(scripts/SUS/InMatCalc/freeSwing.py) reliably
  
  16572   Tue Jan 11 12:19:12 2022 AnchalSummaryBHDLO1 Input Matrix Diagonalization performed.The frree swinging test was successful.
I ran the input matrix diagonalization code
(scripts/SUS/InMAtCalc/sus_diagonalization.py)
 LO1_SUS_InpMat_Diagnolization.pdfLO1_FreeSwingData_PeakFitting.pdf 
  16575   Tue Jan 11 15:21:16 2022 AnchalUpdateBHDPR2 transmission calculationI did this simple calculation where I assumed
1W power from laser and 10% transmission
past IMC. We would go ahead with V6-704/V6-705
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPRS_Trans_Calc.ipynb.zip 
  16577   Tue Jan 11 18:18:29 2022 AnchalSummaryBHDAttempted OSEM installation on AS1[Anchal, Paco, Yehonathan]

Connected in-cir cable to new flange
on ITMY Chamber
  
  16578   Tue Jan 11 18:40:25 2022 AnchalSummaryBHDAS1 Sat Amp has a PCB issueAS1
Sat Amp (S2100741) has a critical PCB
issue on it's Ch5-8 board S2100548. This
 signal-2022-01-11-184917.jpeg 
  16579   Thu Jan 13 09:48:41 2022 AnchalSummaryBHDAS1 Sat Amp fixedI fixed the issue in AS1
Sat Amp (S2100741) by using a razor blade.
I cut the short between the two places, cleaned
 signal-2022-01-13-094823_001.jpegsignal-2022-01-13-094823_002.jpeg 
  16580   Thu Jan 13 12:24:08 2022 AnchalSummaryBHDAS1 SD and LR magnets broke[Anchal (vacuum work), Paco (outside)]

After the AS1 Sat Amp fix (40m/16579),
we today were able to tune all OSEMs to the
  
  16581   Thu Jan 13 12:29:27 2022 AnchalSummaryBHDAS4 LR magnet brokeAfter the debacle with AS1 (40m/16580),
we decided the put the PEEK earthquake stop
by first removing the lower OSEM plate and
  
  16583   Thu Jan 13 17:10:55 2022 AnchalUpdateBHDPR2 transmission calculationI corrected the calculation by adding losses
by the arm cavity ends times the arm cavity
finesse and also taking into account the
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip 
  16585   Fri Jan 14 11:00:29 2022 AnchalUpdateBHDPR2 transmission calculationYeah, I counted the loss from arm cavities
as the transmission from ETMs on each bounce.
I assumed Michelson to be perfectly aligned
  
  16586   Fri Jan 14 12:01:21 2022 AnchalUpdateElectronicsBS & ITMY feedthroughs labeled and connected to Sat AmpsI labeled all the newly installed flanges
and connected the in-air cables (40m/16530)
to appropriate ports. These cables are connected
  
  16587   Fri Jan 14 13:46:25 2022 AnchalUpdateBHDPR2 transmission calculation updatedI updated the arm cavity roundtrip losses
due to scattering. Yehonathan told me that
arm cavity looses 50ppm every roundtrip other
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip 
  16590   Fri Jan 14 18:12:47 2022 AnchalSummaryBHDAS4 placed in ITMY Chamber, OSEMs connectedAS4 was succesfully suspended and trasported
to ITMY chamber (40m/16589).
We placed it near the door to make it easy
  
  16593   Tue Jan 18 18:16:28 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 Sat Amp Box inspectionI tested the monitor ports on the SR2
Sat Amp Box but found that all LED Mon
and PD Mon are giving expected values. I
  
  16595   Wed Jan 19 12:50:10 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuning progress.It was indeed the issue of the top OSEM
plate not being in the right place horizontally.
But the issue was more non-trivial. I believe
  
  16598   Wed Jan 19 16:22:48 2022 AnchalUpdateBHDPR2 transmission calculation updatedI have further updated my calculation.
Please find the results in the attached pdf.

Following is the description of
 PR2transmissionSelectionAnalysis.pdfPR2_Trans_Calc.ipynb.zip 
  16605   Thu Jan 20 17:03:36 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuned.The main issue with SR2 OSEMs, now that
I think of it, was that the BS table was
very inclined due to the multiple things
 DJI_0144.JPG 
  16608   Thu Jan 20 18:16:29 2022 AnchalUpdateBHDAS4 set to trigger free swing testAS4 is set to go through a free swinging
test at 10 pm tonight. We have used this
script (Git/40m/scripts/SUS/InMatCalc/
  
  16609   Thu Jan 20 18:41:55 2022 AnchalSummaryBHDSR2 set to trigger free swing testSR2 is set to go through a free swinging
test at 3 am tonight. We have used this script
(Git/40m/scripts/SUS/InMatCalc/freeSwing.py)
  
  16610   Fri Jan 21 11:24:42 2022 AnchalSummaryBHDSR2 Input Matrix Diagonalization performed. The free swinging test
was successful. I ran the input matrix diagonalization
code (
 SR2_SUS_InpMat_Diagnolization_20220121.pdfSR2_FreeSwingData_PeakFitting_20220121.pdf 
  16613   Fri Jan 21 16:40:10 2022 AnchalUpdateBHDAS4 Input Matrix Diagonalization performed. The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py)
 AS4_SUS_InpMat_Diagnolization_20220121.pdfAS4_FreeSwingData_PeakFitting_20220121.pdf 
  15851   Mon Mar 1 11:40:15 2021 Anchal, PacoSummaryIMCgetting familiar with IMC controls[Paco, Anchal]

tl;dr: Done no harm, no
lasting change.
  
  15982   Wed Mar 31 22:58:32 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing TestA cross-coupling test has been set to trigger
at 05:00 am on April 1st, 2021. The script
is waiting on tmux session 'cB' on
  
  15984   Thu Apr 1 13:56:49 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test ResultsThe coil balancing attempt failed. The
off-diagonal values in the measured sensing
matrices either remained the same or increased.
 SDistanceFromIdentity.pdfSmatIterations.pdfTestingExcitationAlongYAW.pdf 
  15985   Thu Apr 1 18:01:06 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test Results Success??After fixing a few things we felt were
wrong in our implementation of the algorithm,
we ran the coil balancing for 12 iterations
 SDistanceFromIdentity.pdfSmatIterations.pdfMC2CoilCrossCoupling_opt.png 
  15995   Mon Apr 5 08:25:59 2021 Anchal, PacoUpdateGeneralRestore MC from early quakes[Paco, Anchal]

Came in a little bit after 8 and
found the MC unlocked and struggling to lock
  
  16001   Tue Apr 6 18:46:36 2021 Anchal, PacoUpdateSUSUpdates on recent effortsAs mentioned in last post, we earlier made
an error in making sure that all time series
arrays go in with same sampling rate in CSD
 FirstMeasurementPlots.pdf 
  16007   Thu Apr 8 17:04:43 2021 Anchal, PacoUpdateSUSFirst Successful Coil BalancingToday, we finally crossed the last hurdle
and got a successful converging coil balancing
run. 
 SDistanceFromIdentity.pdfSmatIterations.pdfSmatrixPlots.pdf 
  16009   Fri Apr 9 13:13:00 2021 Anchal, PacoUpdateSUSFaster coil balancingWe ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than
 SmatIterations.pdfMC2AllOutmat.txt 
  16016   Mon Apr 12 08:32:54 2021 Anchal, PacoSummaryPSLPMC unlocked at 2pm on Sunday; ~ RestoredPMC lost lock between 21:00 and 22:00 UTC
on April 11th as seen in the summary pages:

https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210411/psl/#gallery-4
  
  16042   Fri Apr 16 11:36:36 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixWe tried two sets of filters on the output
matrix POS column in MC2. Both versions failed.
Following are some details.
 20210416_MC2DCcoilBalancingNoFilters.pdfuncFilters.pdf20210416_MC2DCcoilBalancingWithFilters.pdfuncFilters_v2.pdf20210416_MC2DCcoilBalancingWithFilters_v2.pdf 
  16049   Mon Apr 19 12:18:19 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixThe filters were somewhat successful, how
much we can see in attachment 1. The tip
about difference between eigenmode basis
 CrossCoupleTestForEgToCtFilters.pdfuncFilters.pdfuncFilters_v2.pdf 
  16054   Tue Apr 20 10:52:49 2021 Anchal, PacoUpdateSUSAC gain coil output balancing for IMC[Paco, Anchal]


We adopted the following
procedure to balance the coil output gains
 POS2PYuncoupled.pdfPIT2PYuncoupled.pdfMC1YAWexc.pdfMC1PITexc.pdf 
  16063   Wed Apr 21 11:38:27 2021 Anchal, PacoUpdateSUSMC2 Damping Gains OptimizedWe did a step response test with MC2 Suspensoin
Damping Gains and optimized them to get <5
oscillations in ringdown.
 MC2_DampGainStepTestWithNewGains.pngMC2_DampGainStepTestWithOldGains.png 
  16066   Wed Apr 21 15:50:01 2021 Anchal, PacoUpdateSUSMC2 Suspension Optimization summary
MC2
Coil Balancing DC and AC Gains


  
  16072   Thu Apr 22 12:17:23 2021 Anchal, PacoUpdateSUSMC1 and MC3 Suspension Optimization Summary    
  16085   Mon Apr 26 18:52:52 2021 Anchal, PacoHowToComputer Scripts / Programsawg free slotToday we had some trouble launching an
excitation on C1:IOO-MC_LSC_EXC from awggui.
The error read:
  
  16086   Mon Apr 26 18:55:39 2021 Anchal, PacoUpdateSUSMC2 F2A Filters TestedToday we tested the F2A filters created
from the DC gain values listed in 16066.


Filters:


For
 f2a.pdfIMC_F2A_Params_MC2.pdfMC2_F2A_FilterChar_POS2Ang.pdf 
  16087   Tue Apr 27 10:05:28 2021 Anchal, PacoUpdateSUSMC1 and MC3 F2A Filters TestedWe extended the f2a filter implementation
and diagnostics as summarized in 16086
to MC1 and MC3.
 IMC_F2A_Params_MC1.pdfMC1_POStoAng_CrossCoupling.pdfIMC_F2A_Params_MC3.pdfMC3_POStoAng_CrossCoupling.pdf 
  16089   Wed Apr 28 10:56:10 2021 Anchal, PacoUpdateSUSIMC Filters diagnosedGood
morning!
 7x 
  16108   Mon May 3 09:14:01 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseLock
ARMs
 WFS1_PIT_Noise_Inj_Test_IMC_unlocked.pdfWFS1_PIT_Noise_Inj_Test_ARM_locked.pdf 
  16117   Tue May 4 11:43:09 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseWe redid the WFS noise injection test and
have compiled some results on noise contribution
in arm cavity noise and IMC frequency noise
 ArmCavNoiseContributions.pdfIOO-MC1_PIT_NoiseInjTest2.pdfIOO-MC1_PIT_NoiseInjTest_AWGGUI_Config.png 
  16127   Fri May 7 11:54:02 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseWe today measured the calibration factors
for XARM_OUT and YARM_OUT in nm/cts and replotted
our results from 16117
 ITMX-XARM_TF.pdfITMY-YARM_TF.pdfArmCavNoiseContributions.pdf 
  16128   Mon May 10 10:57:54 2021 Anchal, PacoSummaryCalibrationUsing ALS beatnote for calibration, testTest details:


We
locked both arms and opened the shutter for
Yend green laser.
After toggling
 BeatY_ITMY_CalibrationAt57Hz.pdfBeatY_ITMY_CalibrationAt43Hz.pdfBeatY_ITMY_CalibrationAt77Hz.pdf 
  16129   Mon May 10 18:19:12 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noise, CorrectionsA few corrections to last analysis:


The first plot was not
IMC frequency noise but actually MC_F noise
 ArmCavNoiseContributions.pdf 
  16132   Wed May 12 10:53:20 2021 Anchal, PacoUpdateLSCPSL-IMC PDH Loop and XARM PDH Loop diagramAttached is the control loop diagram when
main laser is locked to IMC and a single
arm (XARM) is locked to the transmitted light
 IMC_SingleArm.pdf 
  16133   Wed May 12 11:45:13 2021 Anchal, PacoSummarySUSNew IMC Settings are miserableWe picked a few parameters from 40m summary
page and plotted them to see the effect of
new settings. On April 4th, old settings
 MC_F_Comparison.pdfMC_TRANS_QPD_Comparison.pdfIMC_REFL_DC_Comparison.pdf 
  16138   Thu May 13 11:55:04 2021 Anchal, PacoUpdateSUSMC1 suspension misbehavingWe came in the morning with the following
scene on the zita monitor:

 Screenshot_from_2021-05-13_09-50-24.pngMC1_Glitches_Invest2.pdf 
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