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  40m Log, Page 339 of 339  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  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 
  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
  
  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
  
  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 
  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 
  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
  
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