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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
  
  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 
  14224   Tue Oct 2 18:50:53 2018 yukiConfigurationASCPZT mirror calibration[ Yuki, Gautam ]

I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and
 PZTM1calibrationCH2.pdfPZTM1calibrationCH1.pdfPZTM2calibrationCH2.pdfPZTM2calibrationCH1.pdf 
  14226   Wed Oct 3 14:24:40 2018 yukiConfigurationASCY end table upgrade planInterim Procedure Report:

Purpose

The current setup of AUX Y-arm
  
  14227   Wed Oct 3 18:15:34 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and
 TF_AIboard.pdf 
  14228   Thu Oct 4 00:44:50 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I
  
  14230   Thu Oct 4 22:15:30 2018 yukiConfigurationASCY-end table upgradeBefore changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared
 AUXYGreenLock20180921.jpgPic_FormerSetup.jpegPic_CurrentSetup1004.jpg 
  14232   Fri Oct 5 17:32:38 2018 yukiConfigurationASCY-end table upgradeI measured it with the wrong setting of
a powermeter. The correct ones are here:


beam power going into doubling
  
  14234   Fri Oct 5 22:49:22 2018 yukiConfigurationASCY-end table upgradeI designed a new layout. It has good mode-matching
efficiency, reasonable sensitivity to component
positions, good Gouy phase separation. I'm
  
  14236   Sun Oct 7 22:30:42 2018 yukiConfigurationLSCYarm Green locking was recoveredI finished installation of optics in the
Y-end and recovered green locking. Current
ALS-TRY_OUTPUT is about 0.25, which is lower
 Pic_NewLayout1007.jpgYendGreenModeMatching.zip 
  14237   Mon Oct 8 00:46:35 2018 yukiConfigurationASCY-end table upgrade


Quote:


  
  14240   Tue Oct 9 23:03:43 2018 yukiConfigurationLSCYarm Green locking was recovered[ Yuki, Gautam, Steve ]

To align the green beam in Y-end
these hardware were installed:
 Pic_1Y4.jpgPic_PZTcable.jpg 
  14241   Wed Oct 10 12:38:27 2018 yukiConfigurationLSCAll hardware was installedI connected DAC - AIboard - PZTdriver -
PZT mirrors and made sure the PZT mirrors
were moving when changing the signal
  
  14243   Thu Oct 11 13:40:51 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14245   Fri Oct 12 12:29:34 2018 yukiUpdateComputer Scripts / Programsloss measurementsWith Gautam's help, Y-arm was locked.
Then I ran the script "armloss_dcrefl_asdcpd_scope.py"
which gets the signals from oscilloscope.
  
  14248   Fri Oct 12 20:20:29 2018 yukiUpdateComputer Scripts / Programsloss measurementsI ran the script for measuring arm-loss
and calculated rough Y-arm round trip loss
temporally. The result was 89.6ppm. (The
  
  14251   Sat Oct 13 20:11:10 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14254   Mon Oct 15 10:32:13 2018 yukiUpdateComputer Scripts / Programsloss measurementsI used these values for measuring armloss:


Transmissivitity of ITM
= 1.384e-2 * (1 +/- 1e-2) 
Transmissivitity
 XARM_20181015_1500.pdfYARM_20181015_1500.pdf 
  14255   Mon Oct 15 12:52:54 2018 yukiUpdateComputer Scripts / Programsadditional comments


Quote:


  
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