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IDdown Date Author Type Category Subject Text Attachments
  17082   Mon Aug 15 20:09:18 2022 AnchalUpdateGeneralc1vac issues, 1 pressure gauge died- Disk Full: Just use the usual /etc/logrotate
thing

- Vacuum gauge
  
  17081   Mon Aug 15 18:06:07 2022 AnchalUpdateGeneralc1vac issues, 1 pressure gauge died[Anchal, Paco, Tega]


Disk full issue:

c1vac
was showing /var disk to be full. We moved
  
  17080   Mon Aug 15 15:43:49 2022 AnchalUpdateGeneralComplete power shutdown and startup documentationAll steps taken have been recorded here:
https://wiki-40m.ligo.caltech.edu/Complete_power_shutdown_2022_08
  
  17079   Mon Aug 15 10:27:56 2022 KojiUpdateGeneralRecap of the additional measures for the outage prep[Yuta Koji]

(Report on Aug 12, 2022)

We went around the lab
 PXL_20220812_234438097.jpgPXL_20220812_234655309.jpgPXL_20220812_234748559.jpgrn_image_picker_lib_temp_b5f3e38d-796c-4816-bc0e-b11ba3316cbe.jpgPXL_20220812_235429314.jpg 
  17078   Fri Aug 12 13:40:36 2022 JCUpdateGeneralPreparing for Shutdown on Saturday, Aug 13[Yehonathan, JC]

Our first step in preparing for
the Shutdown was to center all the OpLevs.
  
  17077   Fri Aug 12 02:02:31 2022 KojiUpdateGeneralPower Outage Prep: nodus /home/export backupTook the backup (snapshot) of /home/export
as of Aug 12, 2022

controls@nodus>
  
  17076   Thu Aug 11 17:15:33 2022 CiciUpdateGeneralMeasuring AUX Laser UGF with Red PitayaTL;DR: Have successfully measured the UGF
of the AUX laser on my Red Pitaya! Attached
is one of my data runs (pdf + txt file). 
 rpi_OLG_2022_08_11_16_51_53.pdfrpi_OLG_2022_08_11_16_51_53.txt 
  17075   Thu Aug 11 16:48:59 2022 ranaUpdateComputer Scripts / ProgramsNDS2 updatesWe had several problems with our NDS2 server
configuration. It runs on megatron, but I
think it may have had issues since perhaps
  
  17074   Wed Aug 10 20:51:14 2022 TegaUpdateComputersCDS upgrade Front-end machine setupHere is a summary of what needs doing following
the chat with Jamie today.

 
 IMG_20220810_171002928.jpgIMG_20220810_171019633.jpg 
  17073   Wed Aug 10 20:30:54 2022 TegaSummarySUSCharacterisation of suspension damping[Yuta, Tega]

We diagnosed the suspension damping
of the IMC/BHD/recycling optics by kicking
 12x 
  17072   Wed Aug 10 19:36:45 2022 KojiBureaucracyGeneralLab cleaning and discoveryDuring the cleaning today, we found many
legacy lab items. Here are some policies
what should be kept / what should be disposed
 steel_plate.jpglogbook1.jpglogbook2.jpgpaper_plots.jpg 
  17071   Wed Aug 10 19:24:19 2022 ranaUpdateGeneralWorking Red Pitaya VNA                
Boom!
  
  17070   Wed Aug 10 15:33:59 2022 CiciUpdateGeneralWorking Red Pitaya VNATL;DR: I am now able to inject a swept
sine and measure a transfer function with
python on my Red Pitaya! Attached is
 rpi_vna_test.pdf 
  17069   Tue Aug 9 19:54:31 2022 yutaSummaryLSCFPMI locking tonight[Tega, Anchal, Yuta]

We resored FPMI locking settings.
  
  17068   Tue Aug 9 15:50:22 2022 KojiUpdateBHDBHD fringe contrast improved from 43% to 74%For both 40m/17020
and 40m/17024,
what does the contrast mean if the numbers
  
  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 
  17066   Mon Aug 8 17:16:51 2022 TegaUpdateComputersFront-end machine setupAdded 3 FE machines - c1ioo, c1lsc, c1sus
-  to the teststand following the instructions
in elog15947.
 IMG_20220808_170349717.jpg 
  17065   Mon Aug 8 14:47:10 2022 ranaUpdatePSLFSSSlow/MCAutolocker issue (docker)can't we just go back to the old python
script that was working for many years, and
tested? I imagine that as soon as someone
  
  17064   Fri Aug 5 17:03:31 2022 YehonathanSummaryGeneralTesting 950nm laser found in trash pileI set out to test the actuation bandwidth
of the 950nm laser. I hooked the laser to
the output of the bias tee of PD testing
 20220805_164434.jpgLaserActuation_TF_Measurement.drawio.pdf 
  17063   Fri Aug 5 12:42:12 2022 KojiUpdateIOOIMC WFS: Overnight observation The IMC lock survived overnight and the
WFS servo loops kept it aligned. The IMC
was unlocked in the morning.
 Screen_Shot_2022-08-05_at_12.04.01.png 
  17062   Thu Aug 4 22:32:31 2022 KojiUpdateIOOUpon leaving the lab (WFS investigation)Upon leaving the lab:

- HEPA is ON at
the original speed (i.e. same speed at 5PM
  
  17061   Thu Aug 4 22:14:38 2022 KojiUpdateIOOWFS investigationWFS/MCTRANS_QPD Power Spectra

Attachment 1: HEPA ON

WFS1/2 PIT/YAW Spectra are stabilized
 Screenshot_2022-08-04_22-17-19.pngScreenshot_2022-08-04_22-18-45.png 
  17060   Thu Aug 4 22:14:20 2022 KojiUpdateIOOWFS investigationSensing matrix measurement

MCx_ASCyyy_EXC was shaken with
the amplitude of 3000 cnt. Measure the transfer
 IMC_SUS_channels_TF.pdfIMC_WFS_channels_TF.pdfIMC_WFS_segment_TF.pdfIMC_WFS_220804.xlsx 
  17059   Thu Aug 4 21:58:18 2022 KojiUpdateIOOWFS investigationOK... It seems that all the 6 dof of the
IMC WFS servo loops were closed with some
condition...
 Screenshot_2022-08-04_22-10-57.pngScreenshot_2022-08-04_22-11-16.pngScreenshot_2022-08-04_22-11-53.pngScreenshot_2022-08-04_22-12-39.png 
  17058   Thu Aug 4 19:01:59 2022 TegaUpdateComputersFront-end machine in supermicro boxesKoji and JC looked around the lab today
and found some supermicro boxes which I was
told to look into to see if they have any
 IMG_20220804_184444473.jpgIMG_20220804_191658206.jpgIMG_20220804_185336240.jpgIMG_20220804_185023002.jpg 
  17057   Thu Aug 4 11:28:22 2022 AnchalUpdatePSLFSSSlow/MCAutolocker issue (docker)Added C1:IOO-MC_LOCK
to ALConfigMC.yml which solved the isse
with FSS Slow. We should tune the FSS Slow
  
  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 
  17055   Wed Aug 3 15:01:13 2022 KojiUpdateGeneralBorrowed Dsub cables Borrowed DSUB cables for
Juan's SURF project
 PXL_20220803_215819580.jpg 
  17054   Tue Aug 2 17:25:18 2022 TegaConfigurationBHDc1sus2 dolphin IPC issue solved[Yuta, Tega, Chris]

We did
 c1lsc_IPC_status.pngFE_lsmod_dependencies_c1sus2_b4_after_iop_unpdate.png 
  17053   Tue Aug 2 01:10:26 2022 KojiUpdateIOOWFS investigationContinued to work on the WFS repair

Demod phase adjustment:

- Use the PDH signal to
 220801_IMC_WFS_DEMOD.pdf220801_IMC_WFS_DEMOD2.pdfWFS1.pngWFS2.png 
  17052   Mon Aug 1 18:42:39 2022 TegaConfigurationBHDc1sus2 IPC dolphin issue update[Yuta, Tega]

We decided to give the dolphin
debugging another go. Firstly, we noticed
 c1sus2_dolphin.pngfb1_dxamin_status.pngdolphin_num_mem_init2.png 
  17051   Mon Aug 1 17:19:39 2022 CiciSummaryGeneralRPitaya Data on Jupyter NotebookHave successfully plotted data from the
Red Pitaya on Jupyter Notebook! Have
lost years of my life fighting with PyQt.
  
  17050   Sat Jul 30 12:48:18 2022 KojiUpdatePSLFSSSlow/MCAutolocker issue (docker)> it only starts working when C1:IOO-MC_LOCK
is 1 and C1:PSL-FSS_SLOWLOOP is 1.

- OK. Your new MCAutolocker does
  
  17049   Sat Jul 30 10:38:12 2022 AnchalUpdatePSLFSSSlow/MCAutolocker issue (docker)The FSSSlow script was not properly documented
and it was not working, so I had to use one
that I knew worked from CTN. This scripts
  
  17048   Fri Jul 29 22:37:54 2022 KojiUpdateIOOWFS investigationI wanted to check what's wrong with
the WFS.

I played with MC2 misalignment
 PXL_20220730_040900843.jpgPXL_20220730_041216848.jpg 
  17047   Fri Jul 29 20:21:11 2022 KojiUpdatePSLFSSSlow/MCAutolocker issue (docker)MCAutolocker/FSSSlow are not properly documented
and not properly working.
Tidy up the script and documentation,
  
  17046   Fri Jul 29 18:24:53 2022 TegaUpdateBHDLO beam power improved by factor of 6 after LO and AS beam alignment[Yuta, Tega]

From our previous work (elog 17044)
 LO_and_oldAS_settings.pngBHD_fringe_settings.pngScreenshot_2022-07-29_19-37-39.pngFromTheLeft-AS-POP-LO.JPG 
  17045   Thu Jul 28 20:16:26 2022 AnchalUpdateBHDShaking test for LO beam AS beam to BHD DCPDsSome insights from the inside vacuum situation:


The beam is an incident
near normal on PR2 close to the center of
  
  17044   Thu Jul 28 16:51:55 2022 TegaUpdateBHDShaking test for LO beam AS beam to BHD DCPDs[Yuta, Tega, Yehonathan]

To investigate the BHD power imbalance
and clipping issues, we did some shaking
 Screenshot_2022-07-28_16-58-34_LOandASShaking.pngScreenshot_2022-07-28_18-08-55_DCPDPOPSuspensionCoherence.png 
  17043   Thu Jul 28 15:11:59 2022 KojiUpdateCDSToo huge script_archiveAs a result of the following work, the
file volume of /cvs/cds
was reduced from 3.2TB to 2.2TB,
  
  17042   Thu Jul 28 14:34:40 2022 YehonathanUpdateBHDLO beam power at BHD DCPDs is significantly lower than expected{Yuta, Yehonathan}

We went to the BS table to check
the POP beam power. We first notice that
  
  17041   Thu Jul 28 13:09:28 2022 yehonathanUpdateBHDMode matching considerationsThe LO beam was found to have a power of
60uW, 10% of the power expected. We are pretty
sure about the expectation because the AS
  
  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 
  17039   Wed Jul 27 14:39:04 2022 DeekshaUpdateElectronicsNew and improved PZT TF data from the DFDPaco and I messed around with the attenuation
of the scope and bandwidth of the IF. We
also replaced the BNC T's in the
 tf_data.pnglatest_data.zipdfd_-_new.drawio.png 
  17038   Tue Jul 26 21:16:41 2022 KojiUpdateComputer Scripts / ProgramsVector fittingI think the fit fails as the measurement
quality is not good enough.

 
  
  17037   Tue Jul 26 20:54:08 2022 PacoUpdateBHDBHD MICH test - LO phase control[Yuta, Paco]


TL;DR
Successfully
 20220726_BICHD.pdf 
  17036   Tue Jul 26 19:50:25 2022 DeekshaUpdateComputer Scripts / ProgramsVector fittingTrying to vectfit to the data taken from
the DFD previously but failing horribly.
I will update this post as soon as I get
 data.pngfit_attempt.png 
  17035   Mon Jul 25 18:22:30 2022 DeekshaSummaryWikiMeasured the PZT TF Successfully Measured the PZT beatnote using the setup
mentioned in elog post 17031. Attached is
the data taken from 10kHz to 1MHz, decadewise
 6x 
  17034   Mon Jul 25 18:09:41 2022 TegaConfigurationBHDBHD Homodyne Phase control MEDM screen[Paco, Tega, Yuta]

Today, we made a custom MEDM screen
for the BHD Homodyne Phase Control, which
 Screen_Shot_2022-07-25_at_6.12.08_PM.pngScreen_Shot_2022-07-25_at_6.18.09_PM.png 
  17033   Mon Jul 25 17:58:10 2022 TegaConfigurationBHDc1sus2 IPC dolphin issue updateFrom the 40m
wiki, I was able to use the instructions
here
 Screen_Shot_2022-07-25_at_5.43.28_PM.pngScreen_Shot_2022-07-25_at_5.21.10_PM.pngScreen_Shot_2022-07-25_at_5.30.58_PM.pngScreen_Shot_2022-07-25_at_5.35.19_PM.png 
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