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ID Date Authordown Type Category Subject Text Attachments
  16911   Mon Jun 13 20:26:09 2022 yutaUpdateASCYarm ASS re-tuning in progress -part 2-[Anchal, Yuta]

We are still in the progress of re-commissioning
 Screenshot_2022-06-13_20-47-12.pngScreenshot_2022-06-13_20-44-43.png 
  16914   Tue Jun 14 19:34:06 2022 yutaUpdateSUSResonant frequency identification from the free swing test[JC, Anchal, Yuta]

We are working on resonant frequency
idendification from the free swing test done
 7x 
  16919   Wed Jun 15 15:45:37 2022 yutaUpdateSUSLO1 LLCOIL now working, it was loose connectionWe tracked the issue of LO1 LLCOIL not
actuating LO1, and found that the DB9 cable
from the coil driver to the sat amp was loose.
 Measurement.JPGBAD.JPGScreenshot_2022-06-15_15-59-05.png 
  16920   Wed Jun 15 17:03:17 2022 yutaUpdateSUSITMY ULCOIL issue solved, loose connection in sat amp box[Anchal, Yuta]

We fixed the issue of ITMY ULCOIL
 Measured16Ohms.JPGSatAmpTerminator.JPGBAD.JPGSUCCESSFUL_KICK.png 
  16922   Thu Jun 16 15:29:03 2022 yutaUpdatePSLPMC input beam aligned again, IMC [Paco, Tomislav, Yuta]

Somehow, when we were trying to measure
 Screenshot_2022-06-16_15-27-30.png 
  16929   Fri Jun 17 16:22:21 2022 yutaUpdateLSCActuator calibration of BS. ITMX, ITMY, updated MICH displacement spectra from c1calFollowing what we have done in 2013 (40m/8242),
actuator calibration was done using MICH.
 6x 
  16932   Tue Jun 21 14:17:50 2022 yutaConfigurationBHDBHD DCPDs re-routed to c1sus2After discussing with Anchal, we decided
to route BHD related PD signals directly
to ADC of c1sus2, which handles our new suspensions
 C1X07ADC1.JPGBHDDCPDs.JPG 
  16935   Tue Jun 21 21:17:16 2022 yutaUpdateBHDRTS models for BHD added but PCIE error remaining[Anchal, Yuta]

RTS
models for BHD homodyne phase control (c1hpc)
 Screenshot_2022-06-21_20-12-55_C1HPC.pngScreenshot_2022-06-21_20-14-56_C1SU2.pngScreenshot_2022-06-21_20-13-38_C1LSC.pngScreenshot_2022-06-21_20-34-44_RED.png 
  16940   Wed Jun 22 18:55:31 2022 yutaUpdateLSCDaily alignment work; POY trouble solved[Koji, Yuta]

I found that Yarm cannot be locked
 Screenshot_2022-06-22_17-17-42_XYaligned.pngScreenshot_2022-06-22_18-58-26_Transmission.png 
  16949   Mon Jun 27 12:32:45 2022 yutaUpdateIOOWFS issues fixed    
  16952   Mon Jun 27 18:54:27 2022 yutaUpdateLSCModulation depths measurement using Yarm cavity scan[Yehonathan, Yuta]
EDITED
by YM on 22:11 June 27, 2022 to correct for
 YarmModIndex.png 
  16954   Tue Jun 28 14:24:23 2022 yutaUpdateBHDBHD DC PD signals now also sent to c1lsc to circumvent IPC error[JC, Yuta]

To circumvent IPC error sending
BHD DC PD signals from c1sus2 to c1lsc, DB9
 C1LSC.JPGC1SUS2.JPGScreenshot_2022-06-28_16-03-16_BHDDCPDcopied.png 
  16968   Fri Jul 1 08:50:48 2022 yutaSummaryLSCFPMI with REFL/AS55 trial[Anchal, Paco, Yuta]

We tried to lock FPMI with REFL55
and AS55 this week, but no success yet.
  
  16977   Thu Jul 7 18:18:19 2022 yutaUpdateLSCActuator calibration of ETMX and ETMX(This is a
complete restore of elog 40m/16970
from July 5, 2022 at 14:34)
 Screenshot_2022-07-05_14-52-01_OLTF.pngScreenshot_2022-07-05_14-54-03_TF.pngScreenshot_2022-07-05_14-56-41_Ratio.png 
  16978   Thu Jul 7 18:22:12 2022 yutaUpdateLSCActuator calibration of MC2 using Yarm(This is also
a restore of elog 40m/16971
from Jul 5, 2022 at 17:36)
 TF.pngMC2.png 
  17002   Thu Jul 14 00:10:08 2022 yutaSummaryLSCFPMI with REFL/AS55 trial continued[Paco, Koji, Yuta]

We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets
 AS55_I.pngAS55_Q.pngREFL55_I.pngREFL55_Q.png 
  17014   Mon Jul 18 17:07:12 2022 yutaUpdateLSCx4.12 added to ETMX coil outputs to balance with ETMYTo balance the actuation on ETMX and ETMY,
x4.12
was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL
  
  17018   Tue Jul 19 16:00:34 2022 yutaConfigurationBHDFast channels for BHD DCPDs now available in c1lsc but not in c1hpc[Paco, Anchal-remote-support, Yuta]

We added fast channels to BHD DC
PDs.
 Screenshot_2022-07-19_14-26-39_c1hpc.pngScreenshot_2022-07-19_14-24-49_c1lsc.pngScreenshot_2022-07-19_15-51-25_GreenGreen.png 
  17020   Tue Jul 19 18:41:42 2022 yutaUpdateBHDContrast measurements for Michelson and ITM-LO[Paco, Yuta]

We measured contrast of Michelson
 ContrastMeasurements.pdf 
  17028   Fri Jul 22 17:46:10 2022 yutaConfigurationBHDc1sus2 watchdog update and DCPD ERR channels[Tega, Yuta]

We have added C1:HPC-DCPD_A_ERR and
 Screenshot_2022-07-22_17-48-25.png 
  17040   Wed Jul 27 18:30:50 2022 yutaUpdateBHDLO beam power at BHD DCPDs is significantly lower than expected[Paco, Yehonathan, Yuta]

We measured power and counts at
BHD DCPDs with LO beam only and ITM single
 LOBeamAtBHD.JPGITMXSingleBounceAtBHD.jpg 
  17056   Wed Aug 3 16:00:51 2022 yutaUpdateBHDBHD fringe aligned with reduced LO and AS beam clippingLast week, we could find an alignment which
realizes LO beam and AS beam both unclipped,
but it was not consistent with an alignment
 Screenshot_2022-08-03_15-46-36_BHDfringeAlmostUnclipped.png 
  17067   Tue Aug 9 15:33:12 2022 yutaUpdateBHDBHD fringe contrast improved from 43% to 74%[Anchal, Yehonathan, Yuta]

We did the constrast measurement with
 HPC-DCPD_B_OUT_1344118517_ITMY-LO.pngHPC-DCPD_A_OUT_1344118517_ITMY-LO.pngHPC-DCPD_B_OUT_1344118318_ITMX-LO.pngHPC-DCPD_A_OUT_1344118318_ITMX-LO.png 
  17069   Tue Aug 9 19:54:31 2022 yutaSummaryLSCFPMI locking tonight[Tega, Anchal, Yuta]

We resored FPMI locking settings.
  
  17085   Wed Aug 17 07:35:48 2022 yutaBureaucracyGeneralMy wish list for IFO commissioningFPMI related
- Better suspension damping
HIGH
  
  17201   Thu Oct 20 14:13:42 2022 yutaSummaryPSLPMC and IMC sideband frequencies measuredI measured the sideband frequencies for
PMC and IMC lock (to use it for Mariner PMC
and IMC design).
 IMC.JPGPMC.JPG 
  17204   Fri Oct 21 16:15:10 2022 yutaSummaryBHDLO phase locking with BH55 audio dither trials[Paco, Yuta]

We are still struggling with locking
LO phase in MICH or ITM single bounce with
 Screenshot_2022-10-21_15-33-18_LO_OLTF_LO1_BH55_Q.pngScreenshot_2022-10-21_15-42-50_LO_OLTF_LO1_BHDCDIFF.pngScreenshot_2022-10-21_15-44-53_MICH_OLTF.pngScreenshot_2022-10-21_15-50-43_LO_OLTF_LO1_BH55_Q_MICH.pngScreenshot_2022-10-21_16-11-16.png 
  17265   Mon Nov 14 17:45:02 2022 yutaUpdateBHDBHD DC PD unwhitening and removing cables to c1lsc[Paco, Yuta]

We removed splitter to route BHD DC
 Screenshot_2022-11-15_13-08-17.png 
  17270   Tue Nov 15 19:00:56 2022 yutaSummaryBHDMICH locked with balanced homodyne readout at some LO phase[Paco, Yuta]

MICH
was locked with BHD DCPD A-B signal with
 Screenshot_2022-11-15_18-34-25_MICHBHDLocked.pngScreenshot_2022-11-15_19-02-02_MICHLine.pngScreenshot_2022-11-15_18-38-20_BHDMICHOLTF.png 
  17273   Wed Nov 16 15:09:08 2022 yutaUpdateBHDBHD fringe contrast measured with unwhitening filtersBHD fringe visibility was measured again
with unwhitening filters on on BHDC_A and
B, which removed signal leakage to zero (
 ContrastMeasurements20221116_edited.pdf 
  17274   Wed Nov 16 18:41:17 2022 yutaSummaryBHDOptical gain calibrations for BHD MICHOptical gains of AS55 and BH55 are calibrated
for BHD MICH.

LO-ITM single bounce:
 Screenshot_2022-11-16_18-57-12.pngScreenshot_2022-11-16_18-49-53_BHDMICHCalLines.pngLSC-AS55_Q_ERR_DQ_1352689642.png 
  17279   Thu Nov 17 14:12:58 2022 yutaSummaryBHDOptical gain calibrations for BHD MICH with lower UGF[Paco, Yuta]

We found that MICH UGF was unexpectedly
 Screenshot_2022-11-17_14-39-17_MICHLOPHASEOLTF.pngScreenshot_2022-11-17_14-41-40_LowUGFConfiguration.png 
  17282   Thu Nov 17 20:02:10 2022 yutaSummaryBHDMICH optical gain measurements with different LO phasesMICH
optical gain was measured with different
LO phases over ~90 degrees.
 UncalibratedMICHOpticalGainVSLOphase20221117.pngCalibratedMICHOpticalGainVSLOphase20221117.png 
  17284   Fri Nov 18 13:05:00 2022 yutaSummaryBHDGains adjusted for bandstop filters for BHD optics[Paco, Yuta]

We realized that bandstop filters
 Screenshot_2022-11-18_13-16-31_AS1ViolinFilters.png 
  17285   Fri Nov 18 16:58:39 2022 yutaSummaryBHDActuator calibrations for MICH BHDAs there is some confusion in actuator
calibration, we have done the measurement
again from scratch.
 7x 
  17287   Fri Nov 18 22:46:02 2022 yutaSummaryBHDMICH optical gain measurements with different LO phases, with signsMICH
optical gain with a sign was measured with
different LO phases over ~180 degrees, with
 UncalibratedMICHOpticalGainVSLOphase20221118.pngCalibratedMICHOpticalGainVSLOphase20221118.png 
  17294   Mon Nov 21 17:44:00 2022 yutaSummaryBHDMICH BHD displacement sensitivity with AS55_Q and BHD_DIFF[Paco, Yuta]

MICH displacement sensitivity was
compared under AS55_Q locking and BHD_DIFF
 Screenshot_2022-11-21_17-33-20_OLTF.pngScreenshot_2022-11-21_17-45-25_MICHBHDDisplacement.png 
  17296   Mon Nov 21 18:43:46 2022 yutaUpdateBHDc1hpc and c1lsc modified to send BHD_DIFF and BHD_SUM[Anchal, Yuta]

To send BHD signals from c1hpc after
 Screenshot_2022-11-21_18-42-49_BHD.png 
  17309   Wed Nov 23 20:58:23 2022 yutaSummaryBHDBHD_DIFF sensitivity to BS dither with MICH Offset with different BH55 demodulation phases[Anchal, Paco, Yuta]

Attachment #1 is the same plot as 
 BHDIFF_rand_SensvsMICHOffset_pydemod.pdfBHDIFF_rand_SensvsMICHOffset_pydemod_NoMICHinBH55Q.pdfBHDIFF_rand_SensvsMICHOffset_pydemod_BH55at70deg.pdfMICHBHD_BH55.pdf 
  17339   Tue Dec 6 13:09:44 2022 yutaUpdateBHDc1cal model updates to support sensing matrix for BHD[Anchal, Yuta]

We have modified c1cal model to support
 Screenshot_2022-12-06_13-02-05_c1calMEDM.pngScreenshot_2022-12-06_13-06-35_c1lsc.pngScreenshot_2022-12-06_13-07-14_c1cal.pngScreenshot_2022-12-06_13-07-50_c1caldemod.png 
  17345   Wed Dec 7 16:21:05 2022 yutaSummaryBHDImproved MICH BHD alignment[Yehonathan, Yuta]

We found that moving AS1 in yaw improves
 LSC-AS55_Q_ERR_DQ_1354479181.png 
  17347   Thu Dec 8 17:52:39 2022 yutaSummaryBHDMICH BHD optical gain measurements at different LO phases, RF+audio dither[Yehonathan, Yuta]

Sensing matrix measurements at
different LO phases were performed under
 BHDMICHSensingMatixvsLOPhase1354581028.pdfBHDMICHSensingMatixvsLOPhase1354580582.pdfBHDMICHSensingMatixvsLOPhaseCombined.pdf 
  14205   Fri Sep 21 09:59:09 2018 yukiConfigurationASCY end table upgrade plan[Yuki, Gautam]

Attachments #1 is the current setup
of AUX Y Green locking and it has
 Pic_CurrentSetup_AUXYgreen.jpegModeMatchingSolution_Current.pdfModeMatchingSolution_Current_Magnified.pdfModeMatchingSolution_Optimized.pdfModeMatchingSolution_Optimized_Magnified.pdf 
  14211   Sun Sep 23 17:38:48 2018 yukiUpdateASCAlignment of AUX Y end green beam was recovered[ Yuki, Koji, Gautam ]

An alignment of AUX Y end green
beam was bad. With Koji and Gautam's
  
  14212   Sun Sep 23 19:32:23 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

The setup I designed before has
abrupt gouy phase shift between two steering
 Pic_NewSetup0923_AUXYgreen.jpegModeMatchingSolution_Result.pdfModeMatchingSolution_Magnified_0923.jpgpic0923_1.jpgpic0923_2.jpg 
  14214   Mon Sep 24 11:09:05 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Steve ]

With Steve's help, we checked
a new lens can be set soon after dichroic
 pic0924_1.jpg 
  14216   Tue Sep 25 18:08:50 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

We want to remotely control steeing
PZT mirrors so its driver is needed.
  
  14218   Thu Sep 27 14:02:55 2018 yukiConfigurationASCPZT driver board verification[ Yuki, Gautam ]

I fixed the input terminal that
had been off, and made sure PZT driver
 PZTdriverSimulationDiagram.pdfPZTdriverSimulationResult.pdfPZTdriverPerformanceCheck_ResultOUT.pdfPZTdriverPerformanceCheck_ResultMON.pdfPZTdriver.asc 
  14219   Sun Sep 30 20:14:51 2018 yukiConfigurationASCQPD calibration[ Yuki, Gautam, Steve ]

Results:
I calibrated a QPD (D1600079, V1009)
 QPDcalibrationXaxis.pdfQPDcalibrationYaxis.pdf 
  14221   Mon Oct 1 13:33:55 2018 yukiConfigurationASCQPD calibration


Quote:


 Pic_QPDcalibration.jpg 
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