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ID Datedown Author Type Category Subject Text Attachments
  17404   Thu Jan 19 14:58:40 2023 ranaSummaryBHDIQ demod orthogonalthe
problems with these circle plots:
  
  17403   Thu Jan 19 12:12:09 2023 AnchalSummaryBHDIQ demod orthogonalBy sending two frequencies offset from
eachother to LO input and RF input, we measured
the remaining phase difference between I
 BH44_IQDemodMeasuredDiff_1358192471.pdf 
  17402   Wed Jan 18 20:57:53 2023 PacoSummaryBHDIQ demod orthogonalI tested a spare IQ demod board labeled
33.3 MHz (closer to 44 MHz than the 165 MHz
we had started using) and using the Moku
  
  17401   Tue Jan 17 20:03:19 2023 yutaSummaryBHDBH44 installations: IQ demodulator is not orthogonal[Anchal, Paco, JC, Yuta]

We have started hardware installations
 6x 
  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 
  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 
  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 
  17397   Thu Jan 12 18:51:17 2023 PacoUpdateALSDFD and Phase tracker AM coupling[Anchal, Paco]

We measured DFD AM coupling; it
seems to be minimum at higher RF input and
 DFD_AM_coupling.pdf 
  17396   Thu Jan 12 15:31:27 2023 RadhikaUpdateALSXARM green laser lock debugging[Radhika, Anchal, Paco]

AUX
PDH Loop Stability
 IMG_4166.jpg 
  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 
  17394   Thu Jan 12 10:06:10 2023 PacoUpdateALSDFD discriminant calibration[Paco, Anchal] Log from yesterday
work around 1Y2 rack; note that while this
work was ongoing, TT2 position drifted slowly
 xbeat_dfd.png 
  17393   Wed Jan 11 17:05:55 2023 AnchalUpdateASCWFS demodulation board 112B - Working as expectedThe other modified board 112B has been
fixed and tested now. See the results attached.
The issue was in some malfunctioning OP284
 WFS_Board_112B_Test.pdf 
  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 
  17391   Tue Jan 10 20:24:29 2023 AnchalUpdateASCWFS demodulation board 111B - Working as expectedI've completed the modifications on
two WFS demod boards. This required replacing
all 8 mixer ICs on each board. I also tuned
 WFS_Board_111B_Test.pdf 
  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 
  17389   Tue Jan 10 15:07:33 2023 JCUpdateGeneralClean Large Optical TableI have been working on cleaning the large
optical table next to the PSL table. I have
placed the known optics along in the optical
 IMG_6465.JPG 
  17388   Mon Jan 9 19:41:01 2023 AnchalUpdateSUSNull stream (butterfly/pringle) row added and DQedI updated the suspension model (/cvs/cds/rtcds/userapps/trunk/sus/c1/models/lib/sus_single_control_new.dml)
to add a 5th row in the input matrix so that
we can put in the calculated NULL stream
 SUS_Model_Changes.pngMC1_INMATRIX.png 
  17387   Thu Jan 5 14:30:32 2023 PacoHowToDAQnds2 server restartAfter being unable to fetch data offsite
using the nds40 server, I found enlightment
here.
  
  17386   Wed Jan 4 17:15:41 2023 KojiConfigurationCDSunknown dhcp request to fb1The dhcpd error on the log file stopped
when the yellow (DAQ) ethernet cable was
removed. With Chris's permission I left
 PXL_20230104_233926284.MP.jpg 
  17385   Wed Jan 4 15:10:19 2023 KojiConfigurationCDSunknown dhcp request to fb1Jamie reported that:


The logs (/var/log/daemon.log)
on fb1 are filling with this line:
 PXL_20230104_233907953.jpg 
  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 
  17383   Wed Jan 4 08:52:11 2023 JCUpdateOPLEV TablesETMX laser has diedKoji mentioned to me that this laser has
a degraded output. I removed this replacement
laser and put in a new laser from the Y Arm
 DACBE2CD-35EB-4314-92FD-71C5270A6961.jpeg45D7AF8F-5955-4036-B8AE-D761C2838408.jpeg 
  17382   Tue Jan 3 17:41:55 2023 KojiUpdateCDSChiara local backupChris modified the fstab so that the disk
is automatically mounted. The key was that
these two disks have an identical UUID and
  
  17381   Tue Jan 3 16:11:05 2023 KojiUpdateCDSChiara local backupI checked how the local backup of our /cvs/cds
is done. The last backup was taken on 2022-12-15
and it kept failing since 2022-12-16.
  
  17380   Tue Jan 3 15:28:12 2023 JCUpdateOPLEV TablesETMX laser has diedSeems that the ETMX laser died over the
break and took an extended vacation. I swapped
the laser out with one Koji would use to
 Screen_Shot_2023-01-03_at_3.37.07_PM.png 
  17379   Tue Jan 3 12:10:46 2023 JamieUpdateCDSYearly DAQD fix 2023, did not work :(This
whole procedure is no longer needed after
the CDS upgrade.  We don't do things
  
  17378   Tue Jan 3 11:32:32 2023 AnchalUpdateCDSYearly DAQD fix 2023, did not work :(Every year some changes need to be done
manually in a driver c code file for daqd
to work. The gpstime offset needs to be changed
  
  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
  
  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 
  17375   Fri Dec 30 12:53:47 2022 KojiUpdateGeneral40m avoided the power outageReceived the campus power outage this (Dec
30, 2022) morning.
- ELOG is still up
  
  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
  
  17373   Wed Dec 28 19:50:06 2022 PacoUpdateCDSAnother CDS crash -- restored by model restartStopped by lab today. Found all suspensions
undamped (even though watchdogs never tripped),
same symptom as CDS crash from earlier this
  
  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
  
  17371   Wed Dec 21 12:38:32 2022 ChrisUpdateOptimal ControlIMC alignment controller testingThree additional mode cleaner alignment
controllers were tested Sunday night (remotely).
They were run in tandem with the (recently
  
  17370   Wed Dec 21 12:35:49 2022 ChrisConfigurationCDSTiming trigger testWhile recovering from the power outage,
I took the opportunity to try having the
timing system trigger on the rising edge
 duotone.png 
  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 
  17368   Tue Dec 20 23:32:58 2022 ranaUpdateASCWFS demodulation board modification - further studyThat's great - I think this solution
will be best. Having the PLLs actually gives
us some problems - the square wave action
  
  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 
  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
  
  17365   Sat Dec 17 16:56:19 2022 AnchalUpdateASCWFS demodulation board modification - further studyI played with the PLL bit more today to
understand the issue. From what I understand,
the following is the summary:
 MokuVCOAttempt.jpgSHGmethod.jpg 
  17364   Fri Dec 16 22:06:55 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at:

PST: 2022-12-16 22:06:53.830911
  
  17363   Fri Dec 16 21:55:54 2022 AnchalUpdateASCWFS demodulation board modification attempt 2 - sort of working[Koji, Anchal]

short version: We checked signals
at different points in the circuit to make
  
  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 
  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
  
  17360   Thu Dec 15 08:37:52 2022 JCUpdateDaily ProgressIMC MisalignmentPMC seems to have gotten very misaligned
over the last 12 hours. I'm going in
to align now.
 Screenshot_2022-12-15_08-37-16.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
  
  17358   Wed Dec 14 12:37:20 2022 RadhikaUpdateALSXARM green laser lock debuggingOn Monday I aimed to measure the transfer function
of the x-arm AUX PDH loop while momentarily
  
  17357   Tue Dec 13 23:49:17 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at:

PST: 2022-12-13 23:49:12.955214
  
  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 
  17355   Fri Dec 9 21:54:40 2022 RadhikaUpdateASCMoku digital filter for low-frequency resonances (ALS/calibration)[Radhika, Paco]

I modeled a digital filter for
adding a resonance at a desired frequency
  
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