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ID Date Authorup Type Category Subject Text Attachments
  17045   Thu Jul 28 20:16:26 2022 AnchalUpdateBHDShaking test for LO beam AS beam to BHD DCPDsSome insights from the inside vacuum situation:


The beam is an incident
near normal on PR2 close to the center of
  
  17049   Sat Jul 30 10:38:12 2022 AnchalUpdatePSLFSSSlow/MCAutolocker issue (docker)The FSSSlow script was not properly documented
and it was not working, so I had to use one
that I knew worked from CTN. This scripts
  
  17057   Thu Aug 4 11:28:22 2022 AnchalUpdatePSLFSSSlow/MCAutolocker issue (docker)Added C1:IOO-MC_LOCK
to ALConfigMC.yml which solved the isse
with FSS Slow. We should tune the FSS Slow
  
  17080   Mon Aug 15 15:43:49 2022 AnchalUpdateGeneralComplete power shutdown and startup documentationAll steps taken have been recorded here:
https://wiki-40m.ligo.caltech.edu/Complete_power_shutdown_2022_08
  
  17081   Mon Aug 15 18:06:07 2022 AnchalUpdateGeneralc1vac issues, 1 pressure gauge died[Anchal, Paco, Tega]


Disk full issue:

c1vac
was showing /var disk to be full. We moved
  
  17092   Fri Aug 19 14:46:32 2022 AnchalUpdateSUSOpen loop transfer function measurements for local damping loops of BHD optics[Anchal, Tega]

As a first step to characterize
all the local damping loops, we ran an open
  
  17096   Sat Aug 20 20:26:10 2022 AnchalUpdateSUSOpen loop transfer function measurements for local damping loops of Core opticsI made measurements of old optics OLTF
today. I have reduced the file sizes of the
plots and data now. It is interesting that
 ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf 
  17129   Fri Sep 2 15:30:10 2022 AnchalUpdateGeneralAlong the X arm part 1[Anchal, Radhika]

Attachment 2: The custom
cables which were part of the intermediate
  
  17130   Fri Sep 2 15:35:19 2022 AnchalUpdateGeneralAlong the Y arm part 2[Anchal, Radhika]

The cables in USPS open box were
important cables that are part of the new
  
  17131   Fri Sep 2 15:40:25 2022 AnchalSummaryALSDFD cable measurements[Anchal, Yehonathan]

I laid down another temporary cable
from Xend to 1Y2 (LSC rack) for also measuring
 ICableOpenEnd_2022-09-02_3_08_34_PM.pngICableShortedEnd_2022-09-02_3_04_43_PM.pngQCableOpenEnd_2022-09-02_3_09_49_PM.pngQCableShortedEnd_2022-09-02_3_00_55_PM.pngDFD_Delay_Measurement.pdf 
  17134   Wed Sep 7 14:32:15 2022 AnchalUpdateSUSUpdated SD coil gain to keep all coil actuation signals digitally same magnitudeThe coil driver actuation strength for
face coils was increased by 13 times in LO1,
LO2, SR2, AS1, AS4, PR2, and PR3.
  
  17140   Thu Sep 15 11:13:32 2022 AnchalSummaryASSYARM and XARM ASS restoredWith limited proof of working for a few
times (but robustly), I'm happy to report
that ASS on YARM and XARM is working now.
  
  17147   Tue Sep 20 18:18:07 2022 AnchalSummarySUSETMX, ETMY damping loop gain tuning[Paco, Anchal]

We performed local damping loop
tuning for ETMs today to ensure all damping
  
  17152   Thu Sep 22 19:51:58 2022 AnchalUpdateBHDBH55 LSC Model Updates - part III updated follwoing in teh rtcds models
and medm screens:


c1lsc

Added
  
  17157   Fri Sep 23 19:04:12 2022 AnchalUpdateBHDBH55 LSC Model Updates - part IIIBH55

I further
updated LSC model today with following changes:


BH55 whitening switch binary
  
  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 
  16157   Mon May 24 19:14:15 2021 Anchal, PacoSummarySUSMC1 Free Swing Test set to triggerWe've set a free swing test to trigger
at 3:30 am tomorrow for MC1. The script for
tests is running on tmux session named 'freeSwingMC1'
  
  16159   Tue May 25 10:22:16 2021 Anchal, PacoSummarySUSMC1 new input matrix calculated and uploadedThe test was succesful and brought back
the IMC to lock point at the end.

We calculated new input matrix
 SUS_Input_Matrix_Diagonalization.pdf 
  16161   Tue May 25 17:42:11 2021 Anchal, PacoSummaryALSALS Single Arm Noise BudgetHere is our first attempt at a single-arm
noise budget for ALS.

Attachment 1 shows
 ALS_IR_b.svgALS_Single_Arm_IR.pdf 
  16163   Wed May 26 11:45:57 2021 Anchal, PacoConfigurationIMCMC2 analog camera[Anchal, Paco]

We went near the MC2 area and opened
the lid to inspect the GigE and analog video
  
  16164   Thu May 27 11:03:15 2021 Anchal, PacoSummaryALSALS Single Arm Noise BudgetHere's an updated X ARM ALS noise budget.

Things to remember:


Major
mistake we were making earlier was that we
 ALS_Single_X_Arm_IR.pdfALS_OOL_with_Ref.pdf 
  16171   Tue Jun 1 16:55:32 2021 Anchal, PacoSummaryALSSingle Arm Actuation Calibration with IR ALS BeatRana suggested in today's meeting to
put in a notch filter in the XARM IR PDH
loop to avoid suppressing the excitation
 SingleArmActCalwithIRALSBeat-1306624785.pdf 
  16174   Wed Jun 2 09:43:30 2021 Anchal, PacoSummarySUSIMC Settings characterizationPlot description:


We
picked up three 10 min times belonging to
the three different configurations:

'Old
 seismicX.pdfseismicXtoMC_F_TFest.pdfseismicXtoMC_TRANS_PIT_TFest.pdfseismicXtoMC_TRANS_YAW_TFest.pdf 
  16175   Wed Jun 2 16:20:59 2021 Anchal, PacoSummarySUSIMC Suspension gains reverted to old valuesFollowing the conclusion, we are reverting
the suspension gains to old values, i.e.

  
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