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ID Date Author Type Category Subject Text Attachments
  16523   Fri Dec 17 22:16:07 2021 YehonathanUpdateBHDSOS assemblyI specifically checked the specification
before mounting the mirror. It says clearly
"Arrow at the thinnest location pointing
  
  16522   Fri Dec 17 19:19:42 2021 KojiUpdateSUSRemaining task for 2021I had the fear that any mistake in the
electronics chain could have been the show
stopper.
 PXL_20211218_030145356.MP.jpg 
  16521   Fri Dec 17 19:16:45 2021 KojiUpdateBHDSOS assemblyWe @40m do the convention of the arrow
at the thinnest side & pointing the HR
side, but nobody says Lambda does the same.
  
  16520   Fri Dec 17 17:50:17 2021 YehonathanUpdateBHDSOS assemblyI threaded a new wire through a different
side block with a magnet and clamped it under
a microscope. It was hard, but eventually,
 AS1rollbalance.pngAS1Magnet_height.pngghostbeam.pnglambdaopticarrow.jpg 
  16519   Fri Dec 17 12:32:35 2021 KojiUpdateSUSRemaining task for 2021Anything else? Feel free to edit this entry.

- SUS: AS1 hanging

- SUS: PR3/SR2/LO2 3/4" thick
  
  16518   Thu Dec 16 18:16:36 2021 YehonathanUpdateBHDSOS assemblyToday I glued magnets onto the new 3/4"
mirror adapters. I also took the opportunity
to make some more side magnets assemblies.
 chippedmirror.pngIMG_6311.JPGIMG_6310.JPGIMG_6309.JPG 
  16517   Thu Dec 16 17:57:17 2021 AnchalUpdateBHDFinished Coil driver (odd serial number) units testsS2100619 was fixed
by Koji and it passed the test after
that.
  
  16516   Thu Dec 16 17:41:12 2021 KojiUpdateBHDCoil driver test failed for S2100619-v1Good catch. It turned out that the both
+ and - side of the output stages for CH2
were oscillating at ~600kHz. If I use a capacitance
 6x 
  16515   Thu Dec 16 15:54:08 2021 KojiUpdateElectronicsITMX feedthroughs and in-vac cables installedThanks for the installation.

With regard to the connector convention,
let's use the attached arrangement so
 PXL_20211216_235056582.jpg 
  16514   Thu Dec 16 15:32:59 2021 AnchalUpdateBHDFinished Coil driver (odd serial number) units testsWe have completed modifications and testing
of the HAM Coil driver D1100687 units with
serial numbers listed below. The DCC
  
  16513   Thu Dec 16 15:04:12 2021 ChubUpdateElectronicsITMX feedthroughs and in-vac cables installedThe ITMX 10" flange with four DSUB-25
feedthroughs has been install with the cables
connected at the in-vac side.  See photo;
 ITMX_feedthrough_install_12-16-21.jpg 
  16512   Thu Dec 16 12:21:16 2021 AnchalUpdateBHDCoil driver test failed for S2100619-v1Today I found one of the coil driver boards,
S2100619
failed the test on CH2. There appears to
 D1100687_S2100619-v1_TF_CH2_Not_Matching.pdf 
  16511   Wed Dec 15 22:09:53 2021 YehonathanUpdateBHDSOS assembly{Paco, Yehonathan, Anchal}

I cut the wires from the winches
and removed the winch adapter plate. I engrave 
  
  16510   Wed Dec 15 17:44:18 2021 KojiSummaryBHDPart VIII of BHR upgrade - Placed LO1If ITMX already has another side magnet,
we can migrate the side OSEM of ITMX to the
other side. This way, the interference of
  
  16509   Wed Dec 15 16:11:38 2021 AnchalSummaryBHDPart VIII of BHR upgrade - Placed LO1[Anchal, Yehonathan, Paco]


Today we opened ITMX chamber
and removed the following optics and placed
 signal-2021-12-15-161437.jpeg 
  16508   Wed Dec 15 15:06:08 2021 JordanUpdateVACVacuum Feedthru InstallJordan, Chub

We installed the 4x DB25 feedthru
flange on the North-West port of ITMX chamber
  
  16507   Wed Dec 15 13:57:59 2021 PacoUpdateComputersupgraded ubuntu on zita[Paco]

Upgraded zita's ubuntu and
restarted the striptool script.
  
  16506   Tue Dec 14 19:29:42 2021 PacoUpdateBHD1Y0 rack work for LO1[Paco]

Two coil drivers have been installed
on 1Y0 (slots 6, 7, for LO1 SOS). All connections
  
  16505   Tue Dec 14 14:02:33 2021 YehonathanUpdateBHDSOS assembly{Yehonathan, Paco}

I fixed the overall height of the
adapter (attachment 1). I put an OSEM next
 magnetcentring.pngFreeSwingingSpectra.pdf 
  16504   Tue Dec 14 11:33:29 2021 TegaUpdatePEMgit repo for temp sensor and sus medm[Temperature sensor]

Added new temp EPICs channels to
database file (/cvs/cds/caltech/target/c1pem1/tempsensor/C1PEMaux.db)
  
  16503   Mon Dec 13 15:05:47 2021 TegaUpdatePEMgit repo for temp sensor and sus medm[temperature sensor]

git repo: https://git.ligo.org/40m/tempsensor.git

todo
  
  16502   Fri Dec 10 21:35:15 2021 KojiSummarySUSVertex SUS DAC adapter ready4 units of Vertex SUS DAC adapter (https://dcc.ligo.org/LIGO-D2100035)
ready.

https://dcc.ligo.org/LIGO-S2101689
 PXL_20211211_053155009.jpgPXL_20211211_053209216.jpgPXL_20211211_050625141-1.jpg 
  16501   Fri Dec 10 19:22:01 2021 KojiUpdateVACPumping down the RGA sectionThe scan result was ~x10 higher than the
previously reported scan on 2020/9/15 (https://nodus.ligo.caltech.edu:8081/40m/15570),
  
  16500   Fri Dec 10 18:55:58 2021 TegaUpdateCDSNew SUS medm screen updateTurns out the BLRMS monitoring channels
for MC1, MC2, MC3, ITMY and SRM already exist
in c1pem. So I modified the new SUS screen
 BLRMS_ITMY_screenshot.png 
  16499   Fri Dec 10 15:59:23 2021 PacoUpdateBHDFinished Coil driver (even serial number) units tests[Paco, Anchal]

We have completed modifications
and testing of the HAM Coil driver D1100687
 dc_fail.jpg 
  16498   Fri Dec 10 13:02:47 2021 Ian MacMillanSummaryComputersQuantization Noise Calculation SummaryI am trying to replicate the simulation
done by Matt Evans in his
presentation  (see Attachment
 G0900928-v1_(dragged).pdfPSD_COMP_BIQ_DF2.pdfInput_PSD.pdfInput_Filter.pdfQuantizationN.zip 
  16497   Thu Dec 9 21:57:35 2021 YehonathanUpdateBHDSOS assembly{Yehonathan, Tega}

We took the optic out of the SOS
tower and removed the side blocks. We mounted
 balancingsos2.pngFreeSwingingSpectra.pdf 
  16496   Thu Dec 9 18:22:36 2021 TegaUpdateCDSNew SUS medm screen updateWork on the medm screen for SUS RMS
monitor is ongoing. The next step would
be to incorporate this into the
 Screen_Shot_2021-12-09_at_6.21.09_PM.png 
  16495   Thu Dec 9 00:32:56 2021 TegaUpdateCDSNew SUS medm screen updateThe new SUS screen can be reached via sitemap
-> IFO SUS button -> NEW
ETMX dropdown menu link. Please use and provide
 Screen_Shot_2021-12-09_at_12.29.30_AM.pngScreen_Shot_2021-12-09_at_12.42.35_AM.png 
  16494   Wed Dec 8 10:14:43 2021 JordanUpdateVACPumping down the RGA sectionAfter an overnight pumpdown/RGA warm up,
I took a 100 amu scan of the RGA volume and
subsequent pumping line. Attached is a screenshot
 40m_RGAVolume_12_8_21.PNG40m_RGAVolume_Torr_12_8_21.PNG 
  16493   Tue Dec 7 13:12:50 2021 KojiUpdateVACPumping down the RGA sectionSo that Jordan can run the RGA scan this
afternoon, I ran TP3 and started pumping
down the RGA section.
  
  16492   Tue Dec 7 10:55:25 2021 Ian MacMillanSummaryComputersQuantization Noise Calculation Summary[Ian, Tega]

Tega and I have gone through the
IIR
 DF2_TS.pdfBIQ_TS.pdfScreen_Shot_2021-12-07_at_11.47.57_AM.pngPSD_COMP_BIQ_DF2.pdfPSD_COMP_SS_DF2.pdf 
  16491   Mon Dec 6 18:23:04 2021 YehonathanUpdateBHDSOS assemblyI installed OSEMs on the LO1 SOS. To my
surprise, the side magnet is not in the center
of the side OSEM. It completely misses the
 signal-2021-12-06-165751_001.jpeg 
  16490   Mon Dec 6 14:26:52 2021 KojiUpdateVACPumping down the RGA sectionJordan reported that the RGA section needs
to be pumped down to allow the analyzer to
run at sufficiently low pressure (P<1e-4
  
  16489   Wed Dec 1 12:57:08 2021 YehonathanUpdateBHDSOS assembly{Yehonathan, Tega}

We glued some magnets onto modified
side blocks. We followed pretty much the
 7x 
  16488   Tue Nov 30 17:11:06 2021 PacoUpdateGeneralMoved white rack to 1X3.5[Paco, Ian, Tega]

We moved the white rack (formerly
unused along the YARM) to a position between
 IMG_8749.JPGIMG_8750.JPG 
  16487   Tue Nov 30 11:03:44 2021 YehonathanMetaphysicsGeneralToilet tank brokena plumber came in yesterday and fixed the
issue.

  
  16486   Mon Nov 29 15:24:53 2021 HangHowToGeneralFisher matrix vs length of each FFT segmentWe have been discussing how does the parameter
estimation depends on the length per FFT
segment. In other words, after we collected
 setup.pdfFisher_vs_Tperseg.pdffisher_vs_mcmc_offset_removed.pngfisher_vs_mcmc.png 
  16485   Wed Nov 24 17:13:31 2021 YehonathanMetaphysicsGeneralToilet tank brokenThe toilet tank in the big bathroom stopped
refilling. I contacted PPService@caltech.edu
and put up an "Out of Order sign".
  
  16484   Wed Nov 24 14:34:15 2021 YehonathanUpdateBHDSaving on SUSAUX slow channelsKoji found out that the stock for BIO Acromag
modules is very low and that the lead time
for ordering new ones is ~ 1-year X-o.
  
  16483   Wed Nov 24 14:15:15 2021 YehonathanUpdateBHDSOS assemblyLate update. We got 2 modified side blocks
from Jordan a few days ago. Yesterday, I
glued a side magnet to one of the modified
  
  16482   Wed Nov 24 13:44:19 2021 ranaSummaryComputersQuantization Noise Calculation SummaryThis looks great. I think what we want
to see mainly is just the noise in the 32
bit IIR filtering subtracted from the 64
  
  16481   Wed Nov 24 11:02:23 2021 Ian MacMillanSummaryComputersQuantization Noise Calculation SummaryI added mpmath
to the quantization noise code. mpmath allows
me to specify the precision that I am using
 PSD_IIR_all.pdf 
  16480   Tue Nov 23 18:02:05 2021 AnchalUpdateIMCMC autolocker shifted to python3 script running in dockerI finished copying over the current autolocker
bash script functionality into a python script
  
  16479   Mon Nov 22 17:42:19 2021 AnchalUpdateGeneralConnected Megatron to battery backed ports of another UPS[Anchal, Paco]

I used the UPS that was providing
battery backup for chiara earlier (a APS
  
  16478   Mon Nov 22 16:38:26 2021 TegaSummaryComputer Scripts / ProgramsSUS Plant Plan for New Optics[Tega, Ian]

TODO

1. Investigate cross-coupling
  
  16477   Thu Nov 18 20:00:43 2021 Ian MacMillanSummaryComputer Scripts / ProgramsSUS Plant Plan for New Optics[Ian, Raj, Tega]

Here is the comparison between
 Final_Plant_Testing.zip 
  16476   Thu Nov 18 15:16:10 2021 AnchalUpdateGeneralMoved Chiara to 1X7 above nodus powered with same UPS[Anchal, Paco]

We moved chiara to 1X7 above nodus
and powered with same UPS from a battery
  
  16475   Thu Nov 18 14:29:01 2021 KojiSummaryBHDBHD invac optics / opto-mechanicsI   
  16474   Wed Nov 17 17:37:53 2021 AnchalUpdateGeneralPlaced Nodus and fb1 on UPS powerToday I placed nodus and fb1 on UPS battery
backed supply. Now power glitches should
not hurt our cds system.
  
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