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ID Dateup Author Type Category Subject Text Attachments
  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 
  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 
  17055   Wed Aug 3 15:01:13 2022 KojiUpdateGeneralBorrowed Dsub cables Borrowed DSUB cables for
Juan's SURF project
 PXL_20220803_215819580.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 
  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
  
  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 
  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 
  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 
  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 
  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
  
  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 
  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 
  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
  
  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 
  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 
  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
  
  17069   Tue Aug 9 19:54:31 2022 yutaSummaryLSCFPMI locking tonight[Tega, Anchal, Yuta]

We resored FPMI locking settings.
  
  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 
  17071   Wed Aug 10 19:24:19 2022 ranaUpdateGeneralWorking Red Pitaya VNA                
Boom!
  
  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 
  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 
  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 
  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
  
  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 
  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>
  
  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.
  
  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 
  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
  
  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
  
  17082   Mon Aug 15 20:09:18 2022 KojiUpdateGeneralc1vac issues, 1 pressure gauge died- Disk Full: Just use the usual /etc/logrotate
thing

- Vacuum gauge
  
  17083   Tue Aug 16 18:22:59 2022 TegaUpdateComputersc1teststand rack mounting for CDS upgrade[Tega, Yuta]

I keep getting confused about the
purpose of the teststand. The view I am adopting
 IMG_20220816_180157132.jpgIMG_20220816_175125874.jpg 
  17084   Wed Aug 17 01:18:54 2022 KojiUpdateGeneralNotice: SURF SUS test setup blocking the lab wayJuan and I built an analog setup to measure
some transfer functions of the MOS suspension.
The setup is blocking the lab way around
 PXL_20220817_060428109.jpg 
  17085   Wed Aug 17 07:35:48 2022 yutaBureaucracyGeneralMy wish list for IFO commissioningFPMI related
- Better suspension damping
HIGH
  
  17086   Wed Aug 17 10:23:05 2022 TegaUpdateGeneralc1vac issues, pressure gauge replacement- Disk full

I updated the configuration file
'/etc/logrotate.d/rsyslog' to set
  
  17087   Wed Aug 17 10:27:49 2022 CiciUpdateGeneralLocking X-arm AUX laserTL;DR: Got the x-arm aux laser locked again
and took more data - my fit on my transfer
functions need improvement and my new method
 rpi_OLG_2022_08_16_17_00_41.pdfrpi_OLG_2022_08_16_17_01_21.pdf 
  17088   Wed Aug 17 11:10:51 2022 ranaUpdateComputersc1teststand rack mounting for CDS upgradewe want to be able to run SimPlant on the
teststand, test our new controls algorithms,
test watchdogs, and any other software upgrades.
  
  17089   Thu Aug 18 14:49:35 2022 YehonathanSummaryLSCFPMI Sensitivity{Yuta, Yehonathan}

We wrote a notebook found on Git/40m/measurements/LSC/FPMI/NoiseBudget/FPMISensitivity.ipynb
for calculating the MICH, DARM (currently
 Sensitivity_Plot_1344133503.pdf 
  17090   Thu Aug 18 16:35:29 2022 CiciUpdateGeneralUGF linked to optical gain!TL;DR: When the laser has good lock, the
OLTF moves up and the UGF moves over!

-----------------------------------------------------------
 rpi_OLG_2022_08_17_18_03_52.pdfrpi_OLG_2022_08_17_18_00_50.pdf 
  17091   Thu Aug 18 18:10:49 2022 KojiSummaryLSCFPMI SensitivityThe overlapping plot of the calibrated
error and control signals gives you an approximately
good estimation of the freerun fluctuation,
  
  17092   Fri Aug 19 14:46:32 2022 AnchalUpdateSUSOpen loop transfer function measurements for local damping loops of BHD optics[Anchal, Tega]

As a first step to characterize
all the local damping loops, we ran an open
  
  17093   Fri Aug 19 15:20:14 2022 KojiUpdateGeneralNotice: SURF SUS test setup blocking the lab wayThe setup was (at least partially) cleared.  PXL_20220819_201318044.jpg 
  17095   Fri Aug 19 15:36:10 2022 KojiUpdateGeneralSR785 C21593 CHA+ BNC brokenWhen Juan and I were working on the suspension
measurement, I found that CHA didn't
settle down well.
 PXL_20220819_195619620.jpgPXL_20220819_195643478.jpg 
  17096   Sat Aug 20 20:26:10 2022 AnchalUpdateSUSOpen loop transfer function measurements for local damping loops of Core opticsI made measurements of old optics OLTF
today. I have reduced the file sizes of the
plots and data now. It is interesting that
 ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf 
  17097   Mon Aug 22 14:36:49 2022 ranaUpdateSUSOpen loop transfer function measurements for local damping loops of Core opticsfor damping and OL loops, we typically
don't measure the TF like this because
it takes forever and we don't need that
  
  17098   Mon Aug 22 19:02:15 2022 TegaUpdateComputersc1teststand rack mounting for CDS upgrade II[Tega, JC]

Moved the rack to the location
of the test stand just behind 1X7 and plan
 IMG_20220822_185437763.jpgIMG_20220822_131340214.jpgc1bhd.jpegc1lsc.jpeg 
  17099   Tue Aug 23 14:59:15 2022 JCUpdateToolsNew Toolbox at Y-EndA new tool box has been placed at the Y-end!
Each drawer has its label so PLEASE
put the tools back in their correct location.
 9AFD3E49-0C5B-4626-889A-0A5C62590AD7.jpeg99EC2EB1-EEA0-4AD8-B6D7-A494431E91E5.jpeg 
  17100   Tue Aug 23 22:30:24 2022 TegaUpdateComputersc1teststand OS upgrade - I[JC, Tega, Chris]

After moving the test stand front-ends,
chiara (name server) and fb1 (boot server)
  
  17101   Wed Aug 24 10:49:43 2022 CiciUpdateGeneralMeasuring DFD output/X-arm laser PZT TF with MokuWe measured the TF of the X-arm laser PZT
using the Moku so we can begin fitting to
that data and hopefully creating a digital
 AUX_PZT_Actuator_nofit.pdf 
  17102   Wed Aug 24 12:02:24 2022 PacoUpdateSUSITMX SUS is sus UL glitches?[Yehonathan, Paco]

This morning, while attempting
to align the IFO to continue with noise-budgeting,
 ITMX_UL_badness_08242022.png 
  17103   Wed Aug 24 16:37:52 2022 CiciUpdateGeneralMore DFD/AUX PZT resonance measurements Some more measurements of the PZT resonances
(now zoomed in!) I'm adjusting parameters
on our model to try and fit to it by hand
 AUX_PZT_Actuator_narrow_fit.pdf 
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