40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 344 of 344  Not logged in ELOG logo
IDup Date Author Type Category Subject Text Attachments
  17305   Wed Nov 23 16:34:33 2022 KojiUpdateCDSNew donatella testingLet's use this entry to list of the
test results of new donatella.


Firefox
  
  17306   Wed Nov 23 17:12:34 2022 RadhikaUpdateALSXARM green laser lock debuggingI tested the mixer by feeding it a 300
kHz signal sourced from a Moku:Go. I kept
the LO input the same - 231.25 kHz from
  
  17307   Wed Nov 23 17:21:44 2022 JCUpdateVACInterlocks may have been tripped due to N2 pressure loss[Paco, JC]

While changing out one of the N2
tanks today, one of the fitting stripped.
 Screen_Shot_2022-11-23_at_5.22.57_PM.pngScreen_Shot_2022-11-23_at_5.23.09_PM.png 
  17308   Wed Nov 23 17:28:39 2022 YehonathanUpdateBHDSome more calculationsFields at the BHD BS. More on this later.  Fields_at_BHDBS.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 
  17310   Thu Nov 24 11:23:35 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at
PST: 2022-11-24 11:23:59.509949 PST
  
  17311   Thu Nov 24 15:37:45 2022 AnchalUpdateASCIMC WFS output matrix diagonalization effortI tried following the steps and the method
I was using converged to same output matrix
upto 2 decimal points but there is still
 WFS_Step_DCResponses_Offsets_Marked.png 
  17312   Fri Nov 25 12:15:46 2022 AnchalUpdateVACVacuum Gate valves restoredI came today to find that PSL shutter was
closed. I orginially thought some shimmer
obersvations are underway in the quiet state.
 Screenshot_2022-11-25_12-29-23.png 
  17313   Fri Nov 25 15:35:23 2022 AnchalUpdateSUSLow noise stateTurned off HEPA at:

PST: 2022-11-25 15:34:55.683645
PST
  
  17314   Sun Nov 27 15:30:22 2022 ChrisUpdateOptimal ControlIMC alignment controller testingFive more mode cleaner alignment controllers
were tested this morning (remotely). These
were designed to run in tandem with the standard
  
  17315   Mon Nov 28 11:15:23 2022 AnchalUpdateCDSFront ends DAC Kill (DK) got activated; restored FEs[Anchal, Paco, Yehonathan, JC]

Last night at 9:15 pm PST (Nov
27th, 2022) some kind of disruption happened
 FE_State_Word_Changes.png 
  17316   Mon Nov 28 11:21:25 2022 JCUpdatePSLPMC input beam alignmentC1:PSL-PMC_PMCTRANSPD was increased from
0.72 to 0.731
 Screenshot_from_2022-11-28_11-20-31.png 
  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
  
  17318   Mon Nov 28 16:58:20 2022 PacoUpdateCDSpypi package added[Paco, Tega]

I added the pypi package "restoreEpics"
  
  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
  
  17320   Mon Nov 28 20:14:27 2022 AnchalUpdateASCAS WFS proposed path to IMC WFS headsIn Attachment 1, I give a plan for the
proposed path of AS beam into the IMC WFS
heads to use them temporarily as AS WFS.
 F5B115E5-885F-463C-9645-BB2EB73B6144_1_201_a.jpeg 
  17321   Tue Nov 29 11:38:37 2022 JCHowToLSCLock Single Arm After MICH lockI tried locking single arm this morning,
but I was unable to because the triggers
were set to lock strictly to MICH. Anchal
 Screen_Shot_2022-11-29_at_11.01.56_AM.png 
  17322   Tue Nov 29 15:32:32 2022 AnchalUpdateBHDc1hpc model updates to support double audio ditherMany changes have been done to c1hpc to
support dual demodulation at audio frequencies.
We moved away with ASS style of lockin setup
 Screenshot_2022-11-29_15-36-05.png 
  17323   Wed Nov 30 10:48:10 2022 JCConfigurationGeneralLED Instead of Incandescent Lights All incondescent lightsbulbs have been
switched over to LED.

  
  17325   Wed Nov 30 14:25:34 2022 TegaUpdateCDSAMD display driver installationAfter swapping out the HDD on donatella,
I noticed that the display resolution was
stuck on 700x400 and could not be changed.
  
  17326   Wed Nov 30 18:27:07 2022 PacoUpdateGeneralMaking the Jenne laser great again[Paco]

I picked up the 950 nm laser that
Koji tested before and restored the Jenne
 PXL_20221201_004623398.jpgPXL_20221201_015752792.jpg 
  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 
  17330   Fri Dec 2 15:59:55 2022 RadhikaUpdateALSXARM green laser lock debuggingI took a transfer function measurement
of the XEND PDH servo box, from servo input
to piezo output [Attachment 1]. The servo
 XEND_green_pdhservo_TF.pdfG1_PDHbox_TF.png 
  17331   Sat Dec 3 10:13:56 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at:

PST: 2022-12-03 10:13:03.184705
  
  17332   Sat Dec 3 17:42:25 2022 AnchalUpdateASCIMC WFS Fixed for nowToday I did a lot of steps to eventually
reach to WFS locking stably for long times
and improving and keeping the IMC transmission
 IMC_WFS_OLTF.pdf 
  17333   Sun Dec 4 10:03:02 2022 ChrisUpdateOptimal ControlIMC alignment controller testingAnother five
mode cleaner alignment controllers were tested
last night (remotely), running in tandem
  
  17334   Sun Dec 4 16:44:04 2022 AnchalUpdateASCIMC WFS Fixed for nowToday, I worked on WFS loop output matrix
for PIT DOFs.


I began with the matrix
 IMC_WFS_OLTF_All_Gains_1.pdfIMC_WFS_OLTF_Nom_Gain.pdfWFS_Loop_Configuration.pngWFS_Loop_Performance.png 
  17335   Mon Dec 5 12:05:29 2022 AnchalUpdateCDSc1sus2 all FE models crashed spontaneouslyJust a few minutes ago, all models on FE
c1sus2 crashed. I'm attaching some important
files that can be helpful in investigating
 c1sus2Failed.txtc1sus2Failed.png 
  17336   Mon Dec 5 16:24:45 2022 AnchalUpdateASCIMC WFS servo diagnosis Also reply to: 40m/17255


I ran the toggleWFSoffsets.py
script to generate a step response of the
 IMC_WFS_Step_Response.pdf 
  17337   Mon Dec 5 20:02:06 2022 AnchalUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCI took transfer function measurement of
WFS2 SEG4 photodiode between 1 MHz to 100
MHz in a linear sweep.
 20221205_193105_WFS2_SEG4_RF_TF_Screenshot.pngPXL_20221206_033419110.jpg 
  17338   Tue Dec 6 09:39:22 2022 yehonathanUpdateCDSAnother CDS crashAround 9:30 we noticed IMC going out of
lock with MC1 swinging hard. It seems like
the coil output shut down.
  
  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 
  17340   Tue Dec 6 15:29:35 2022 RadhikaUpdateALSXARM green laser lock debugging[Radhika, JC]

We retook transfer function measurements
of the XEND PDH servo box, this time setting
 XEND_PDH_servo_TF_boost_on_off.pdf 
  17341   Tue Dec 6 15:59:46 2022 RadhikaUpdateALSXARM green laser lock debugging[Radhika, Paco]

Paco suggested that alignment could
still be the primary reason why the XEND
  
  17342   Tue Dec 6 16:52:26 2022 AnchalUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCI tested teh WFS demod board for possibility
of demodulating 11 MHz or 55 MHz signal with
it. It definitely has some bandpass filter
 WFS1_SEG2_DEMOD_Test.pdf11MHz.png29.5MHz.png55MHz.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 
  17344   Tue Dec 6 17:40:13 2022 KojiUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCWe have spare WFS demods in a plastic box
along the Y arm. So you don't need to
modify the IMC demod boards, which we want
  
  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 
  17348   Thu Dec 8 20:40:14 2022 AnchalUpdateASCWFS demodulation board modification attemptBased on the previous two elog posts, Koji
and I decided that we should use 11 MHz signal
for arm cavity ASC and modify a spare WFS
 PXL_20221209_035720569.jpgPXL_20221209_035729233.jpg 
  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 
  17350   Fri Dec 9 10:08:54 2022 RadhikaUpdateASCYEND green alignment chroniclesToday I set out to align and lock the
YEND green laser, and observe the expected
PDH error signal and PZT control signal. 
 IMG_3982.jpg 
  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 
  17353   Fri Dec 9 17:42:04 2022 KojiUpdateCDSNew donatella issues
MEDM video switches didn't
work - "sh: 1: /opt/rtcds/caltech/c1/scripts/general/videoscripts/videoswitch3:
not found"


This was
  
  17354   Fri Dec 9 18:32:11 2022 KojiSummaryASCMC WFS sensing matrix measurement[Rana, Koji]

Now the IMC WFS pitch output
matrix was renewed based on the DC sensitivity
 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.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,
  
ELOG V3.1.3-