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ID Date Author Typedown Category Subject Text Attachments
  17224   Thu Nov 3 16:00:58 2022 alexSummaryGeneralSensoray updatesI am currently working on getting the driver
reinstalled on Donatella for the sensoray.
An issue keeps arising that will not allow
  
  17228   Thu Nov 3 20:07:01 2022 AnchalSummaryBHDAS1 coil balancing required[Anchal, Koji]

The LO phase lock that was achieved
lasts for a short time because as soon as
  
  17236   Mon Nov 7 17:10:41 2022 AnchalSummaryBHDQPD installation seems like lost causeThe new QPD installation is turning out
to be much more hard than it originally seemed.
After finsing the cable, QPD and interface
  
  17247   Tue Nov 8 21:39:12 2022 alexSummaryGeneralSensoray & SDI Video Encoder selectionI have been looking at various replacements
for the sensoray, and have found that the
majority of new usb video encoders don't
  
  17253   Thu Nov 10 17:40:31 2022 PacoSummaryCalibrationCalibration PlanPlan to calibrate single arm actuation
strength


Lock single arm cavity
 allan_dev_beatY_demodI.pdfasd_and_rms_beatY_demodI.pdf 
  17257   Fri Nov 11 14:15:45 2022 PacoSummaryCalibrationSingle arm cal with 5 linesI turned all the LSC oscillators on and
used the digital demod for BEATYF (fine y
als beat) to grab the data. For this I added
  
  17266   Tue Nov 15 11:04:01 2022 PacoSummaryCalibrationSingle arm cal with 5 linesYALS Hardware inspection

The
ALS Cal for ITMY actuation was off by ~ 1000,
so I decided I don't trust / understand
 als_cal_osc_2022_11_15.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 
  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 
  17276   Thu Nov 17 09:06:35 2022 JCSummaryGeneralLight ReplaceElectrical Shop came in today to replace
the lightbulbs around 40m. I supervised the
entire visit, inside and outside the lab
  
  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 
  17291   Mon Nov 21 11:52:50 2022 RadhikaSummaryCalibrationSingle arm cal with 5 lines[Paco, Radhika]

We set out to realign the YARM
AUX laser input into the arm cavity.
  
  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 
  17298   Tue Nov 22 10:29:31 2022 AnchalSummarySUSITMY Coil Strengths BalancedI followed this
procedure to balance the coil strengths
on ITMY. The position sensor was created
  
  17303   Wed Nov 23 14:59:11 2022 PacoSummaryBHDBHD_DIFF sensitivity to BS dither with MICH Offset[Yuta, Paco, Anchal]

We measured

(a)
 BHDIFF_rand_SensvsMICHOffset.pdf 
  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 
  17317   Mon Nov 28 16:53:22 2022 AnchalSummaryBHDF2A filters on LO1 LO2 AS1 and AS4[Paco, Anchal]

I changed the script in /opt/rtcds/caltech/c1/Git/40m/scripts/SUS/outMatFilters/createF2Afilters.py
  
  17319   Mon Nov 28 18:21:50 2022 PacoSummaryBHDBH44 prepI checked the LSC rack to evaluate what
we might need to generate 44 MHz rf in the
hypothetical case we go from BH55 to BH44
  
  17328   Wed Nov 30 20:01:08 2022 ranaSummaryCalibrationSingle arm cal with 5 linesI don't think you need to record the
excitations. They are just sine waves. The
amplitude you can read off from the OSC screen.
  
  17329   Thu Dec 1 20:43:25 2022 AnchalSummaryCalibrationSingle arm cal with 5 lines[Anchal, Paco]

We are doing this attempt again
in following configuration:
 SingleArmCalibration.png 
  17343   Tue Dec 6 17:12:23 2022 yehonathanSummaryBHDLO phase control using audio (MICH and AS1) + RF{Yuta, Yehonathan}

Today we lock LO phase using audio+RF
method in two variants: AS1+RF and MICH(BS)+RF.
 Screenshot_2022-12-06_16-44-37_LOPHASE_OLTF_BH55_Q_AS1dither.pngScreenshot_2022-12-06_17-10-47_LOPHASE_OLTF_BH55_Q_BSdither.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 
  17346   Thu Dec 8 16:21:40 2022 PacoSummaryCalibrationITMY actuation strength cal with 5 lines[Anchal, Paco]

After debugging the hardware, on
gpstime 1354422834 we turned
 raw_timeseries.pdfals_beat_cal_spectra.pdfdemod_timeseries.pdfITMY_cal.pdf 
  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 
  17349   Fri Dec 9 05:04:45 2022 ranaSummaryASCMC WFS sensing matrix measurementI made a script to toggle the offsets in
the MC SUS so that we can see the resulting
error signals in the MC WFS / MC-TRANS_QPD.
 Screen_Shot_2022-12-10_at_12.00.46_AM.png 
  17351   Fri Dec 9 13:18:57 2022 yutaSummaryBHDMICH BHD optical gain measurements at different LO phases, elliptic fit[Yehonathan, Yuta]

Here's a plot using same dataset
 BHDMICHSensingMatixvsLOPhaseCombinedXYPlot.pdf 
  17352   Fri Dec 9 14:18:43 2022 AnchalSummarySUSIMC optics angular actuation calibration at DCAlso reply to: 40m/16125


I migrated the code used
in 40m/16125
 IMC_Ang_Act_Calibration.pdf 
  17354   Fri Dec 9 18:32:11 2022 KojiSummaryASCMC WFS sensing matrix measurement[Rana, Koji]

The IMC WFS pitch Output
Matrix was recalculated based on a DC Sensing
 Screen_Shot_2022-12-09_at_18.35.02.pngScreen_Shot_2022-12-09_at_18.38.15.pngScreen_Shot_2022-12-09_at_19.15.16.pngScreen_Shot_2022-12-09_at_19.24.53.pngScreen_Shot_2023-01-09_at_7.11.50_PM.png 
  17356   Fri Dec 9 23:44:14 2022 ranaSummaryASCMC WFS sensing matrix measurementwith the new output matrix, we repeated
the diagonalization script that Anchal ran
previously. In the attached plot you can
 Screen_Shot_2022-12-10_at_6.43.38_PM.png 
  17359   Wed Dec 14 17:01:39 2022 PacoSummaryLSCFPMI in the post-cds upgrade era[Paco, Anchal, Koji]

A possible long-hidden
bug of MC2 dewhitening switching was found
  
  17361   Fri Dec 16 14:52:42 2022 PacoSummarySUSMC1 and MC3 coil dewhitening filters added, location correctedI corrected the filter module location
for 28 Hz ELP filter on MC1 and MC3 coil
output filter banks to FM8 (from FM9). FM9
  
  17362   Fri Dec 16 18:48:49 2022 yutaSummaryGeneralIFO alignment after power loss[Paco, Yuta]

We have recovered the IFO alignment
 LSC-AS55_Q_ERR_DQ_1355280066.pngLSC-BH55_Q_ERR_1355280385.pdfScreenshot_2022-12-16_18-52-13_FPMIBHDaligned.png 
  17366   Tue Dec 20 09:20:18 2022 PacoSummaryLSCFPMI locked and cal [Anchal, Yuta, Paco]

Late elog (from yesterday) -- We
locked FPMI, YAUX, and turned on calibration
  
  17367   Tue Dec 20 18:27:14 2022 AnchalSummaryLSCFPMI locked, DARM calibration data taken, FPMI BHD locked![Anchal, Paco, Yuta]

FPMI
 PXL_20221221_013126861.MP.jpg 
  17369   Wed Dec 21 12:18:44 2022 PacoSummaryLSCFPMI locked, but FPMI BHD not locked[Yuta, Paco]

We tried restoring the FPMI BHD
readout from yesterday but 
 FPMI_calibrated_noise_20221221.pdf 
  17372   Thu Dec 22 15:52:48 2022 KojiSummaryDetCharSummary on the summary pages[Tega Koji]

Last week, Tega gave me
a brief introduction to the configuration
  
  17374   Fri Dec 30 11:38:45 2022 PacoSummaryCalibrationALS Calibration errors -- single arm actuationHere are my thoughts on calibration errors.
This applies to the single arm actuation
calibration, but may easily be extended to
  
  17376   Sat Dec 31 19:27:32 2022 PacoSummaryCalibrationETMY actuation strength cal with 5 linesCalibrated ETMY actuation strength using
ALS. Attachment #1 shows
the result, in close agreement with this
 ETMY_cal.pdf 
  17377   Sat Dec 31 20:00:03 2022 ranaSummaryCalibrationETMY actuation strength cal with 5 lines
how much frequency dependent variation
in the transfer function do we expect? Are
there resonances in the mechanical suspension
  
  17384   Wed Jan 4 12:12:57 2023 PacoSummaryCalibrationALS calibration error from DFD[Paco, Anchal]

One of the crucial and currently
limiting calibration errors is in the ALS
 als_rf_power_screenshot.png 
  17390   Tue Jan 10 16:06:58 2023 yutaSummaryPSLPMC transmission dropped to 0.68[JC, Paco, Yuta]

It seems like PMC transmission
(C1:PSL-PMC_PMCTRANSPD) dropped to ~0.68
 Screenshot_2023-01-10_14-26-46.pngIMG_1994.JPG 
  17392   Wed Jan 11 16:56:57 2023 yutaSummaryLSCFPMI BHD recovered, LO phase noise not limiting the sensitivity[Paco, Yuta]

We recovered FPMI BHD, and sensitivity
 6x 
  17395   Thu Jan 12 12:00:09 2023 PacoSummaryLSCFPMI BHD sensitivity curve with higher resolution upto 6.9 kHzHere's the same sensitivity plot from
yesterday (40m/17392),
but with higher frequency resolution, upto
 FPMI_calibrated_noise_20230112.pdfFPMI_calibrated_noise_20230112_HF.pdf 
  17398   Fri Jan 13 13:34:12 2023 AnchalSummaryBHDBH44 tuned and transimpedance measuredI've tuned one gold box RFPD to be
resonant at 44.26 MHz and I left the notch
to be near 66 MHz, however, it is only effective
 BH44_Transimpedance_From_Test_Port.pdf 
  17399   Fri Jan 13 14:20:34 2023 yutaSummaryLSCCalibration friendly FPMI BHD[Paco, Yuta]

Gains in DARM are corrected to make
 Screenshot_2023-01-13_14-55-34.pngFPMI_calibrated_noise_20230113.pdf 
  17400   Fri Jan 13 18:54:59 2023 yutaSummaryLSCInvestigations of LO phase locking in FPMI BHD[Paco, Yuta]

After several hours of unattended
 Screenshot_2023-01-13_18-41-48_SensMat_FPMIBHD.pngBHD_DARM_Sensors_20230113.pdfFPMI_calibrated_noise_20230113_LO1vsAS4.pdf 
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