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IDup Date Author Type Category Subject Text Attachments
  16544   Wed Jan 5 19:18:06 2022 YehonathanUpdateBHDSOS assembly -- AS4{Paco, Yehonathan, Anchal}

Today we suspended AS4
(E2000226-B
 AS4_roll_balance.pngAS_4_magnet_height.pngFreeSwingingSpectra.pdf 
  16545   Thu Jan 6 11:54:20 2022 AnchalSummaryBHDPart IX of BHR upgrade - Placed AS1 and AS4[Paco (Vacuum Work), Anchal]

Today we opened the ITMY Chamber
and installed suspended AS1 and AS4 in their
  
  16546   Thu Jan 6 12:52:49 2022 AnchalUpdateCDSYearly DAQD fix 2022!Just as predicted, all realtime models
reported "0x4000" error. Read the
parent post for more details. I fixed this
  
  16547   Thu Jan 6 13:54:28 2022 KojiUpdateCDSYearly DAQD fix 2022!Just
restarting all the c1sus2 models fixed the
issue. (Attachment 1)
 Screenshot_2022-01-06_13-57-40.png 
  16548   Thu Jan 6 14:08:14 2022 KojiUpdateCDSMore BHD SUS screens added to sitemapMore BHD SUS screens added to sitemap (Attachment
1)
 Screenshot_2022-01-06_14-06-15.png 
  16549   Thu Jan 6 15:10:38 2022 KojiUpdateSUSITMX Chamber work[Anchal, Koji]

===
Summary ===
 PXL_20220107_044739280.MP.jpgPXL_20220107_044958224.jpgPXL_20220107_044805503.NIGHT.jpgScreen_Shot_2022-01-06_at_20.54.04.png 
  16550   Thu Jan 6 17:00:20 2022 YehonathanUpdateBHDSOS assembly -- LO2{Paco, Yehonathan}

Today we suspended LO2 (E1800089)
 LO2_roll_balance.pngLO2_magnet_height.pngFreeSwingingSpectra.pdf 
  16551   Thu Jan 6 17:16:51 2022 YehonathanUpdateBHDUsing Peek screws/nutsThere were several cases where the long
EQ stops didn't perform as expected.

In one type of case, we used a
  
  16552   Thu Jan 6 21:04:41 2022 AnchalSummaryBHDPart VIII of BHR upgrade - LO1 OSEMs inserted[Anchal, Koji] Part of elog:
40m/16549.

The magnets on the mirror face
  
  16553   Thu Jan 6 22:18:47 2022 KojiUpdateCDSSUS screen debuggingIndicated by the red arrow:
Even when the side damping servo is
off, the number appears at the input of the
 Screen_Shot_2022-01-06_at_18.03.24.png 
  16554   Fri Jan 7 16:17:42 2022 AnchalSummaryBHDPart IX of BHR upgrade - Placed AS1 and AS4 filters[paco]

Added input filters, input matrix,
damping filters, output matrix, coil filters,
  
  16555   Fri Jan 7 17:54:13 2022 AnchalUpdateBHDPR2 Sat Amp has a bad channel[Anchal, Paco]

Yesterday we noticed that one of
the ADC channels was overflowing. I checked
 Screen_Shot_2022-01-07_at_6.05.39_PM.png 
  16556   Fri Jan 7 17:59:45 2022 YehonathanUpdateBHDSOS assembly -- SR2{Yehonathan, Paco}

{Paco, Yehonathan}

Today we suspended SR2 (
 SR2_roll_balance.pngSR2_magnet_height.pngFreeSwingingSpectra.pdf 
  16557   Fri Jan 7 18:24:25 2022 KojiUpdateBHDSOS assembly -- SR2Vacseal in the freezer. It could have been
expired sooooo many years ago, We need some
cure testing.
  
  16558   Fri Jan 7 18:28:13 2022 KojiUpdateBHDPR2 Sat Amp has a bad channelLeave the unit to me. I can look it at
on Mon. For a while, you can take a replacement
unit from the electronics stack.
  
  16559   Sat Jan 8 16:01:42 2022 PacoSummaryBHDPart IX of BHR upgrade - Placed LO2 filtersAdded input filters, input matrix, damping
filters, output matrix, coil filters, and
copy the state over from ITMX into LO2
  
  16560   Mon Jan 10 13:35:52 2022 AnchalUpdateBHDPR2 Sat Amp has a bad channelThe unit was tested before by Tege. The
test included testing the testpoint voltages
only. He summarized his work in
  
  16561   Mon Jan 10 14:00:44 2022 not KojiUpdateBHDSOS assembly -- SR2Yes,

For the thin optics adapter design,
we want Peek 1/4-20 screw (part # 98885A131)
  
  16562   Mon Jan 10 14:52:51 2022 AnchalSummaryBHDLO1 OSEMs roughly calibrated and noise measuredI used the open light level output of 908
for ITMX side OSEM from 40m/16549
to roughly calibrate cts2um filter module
 LO1_vs_ETMX_OSEM_Spectrum_LF_x30_Gain.pdfLO1_vs_ETMX_OSEM_Spectrum_HF_x30_Gain.pdf 
  16563   Mon Jan 10 15:45:55 2022 PacoUpdateElectronicsITMY feedthroughs and in-vac cables installed - part IThe ITMY 10" flange with 10 DSUB-25
feedthroughs has been installed with the
cables connected at the in-vac side. 
  
  16564   Mon Jan 10 15:59:46 2022 KojiUpdateBHDPR2 Sat Amp has a bad channelThe issue was present in the cable between
the small adapter board and the rear panel.
The cable and the Dsub 25 connectors were
 6x 
  16565   Mon Jan 10 17:04:47 2022 AnchalUpdateBHDAS1 Sat Amp CH2 had offsetWe found that there was a small offset
(~300 mV) at TP6 and TP8, in PD2 circuit
(CH2 of the board). I replaced U3 AD822ARZ
  
  16566   Mon Jan 10 18:20:45 2022 AnchalUpdateBHDTested 2" PR2 candidates transmissionI tested 2 more optics found by Paco and
Yehonathan in QIL.

  
  16567   Mon Jan 10 18:36:41 2022 AnchalSummaryBHDLO1 free swinging test set to triggerLO1 is set to go through a free swinging
test at 1 am tonight. We have used this script
(scripts/SUS/InMatCalc/freeSwing.py) reliably
  
  16568   Tue Jan 11 09:53:14 2022 not KojiUpdateBHDSOS assembly -- Peek screws and nutsI handed the Peek parts we got from McMaster
to Jordan for C&B.
  
  16569   Tue Jan 11 10:23:18 2022 PacoUpdateElectronicsITMY feedthroughs and in-vac cables installed - part II[Paco, Chub]

The ITMY 10" flange with 4
DSUB-25 feedthroughs has been installed with
  
  16570   Tue Jan 11 10:46:07 2022 TegaUpdateCDSSUS screen debuggingSeen. Thanks.

Red Arrow: The channel was labeled
incorrectly as INMON instead of OUTPUT
  
  16571   Tue Jan 11 10:58:58 2022 TegaUpdateSUSTemporary watchdogStarted working on this. First created
a git repo for tracking https://git.ligo.org/40m/susaux.git

I have looked through the folder
  
  16572   Tue Jan 11 12:19:12 2022 AnchalSummaryBHDLO1 Input Matrix Diagonalization performed.The frree swinging test was successful.
I ran the input matrix diagonalization code
(scripts/SUS/InMAtCalc/sus_diagonalization.py)
 LO1_SUS_InpMat_Diagnolization.pdfLO1_FreeSwingData_PeakFitting.pdf 
  16573   Tue Jan 11 13:43:14 2022 KojiUpdateSUSTemporary watchdogI don't remember the syntax of the
db file, but here this calc channel computes
A&B. And A&B corresponds to INPA
  
  16574   Tue Jan 11 14:21:53 2022 PacoUpdateElectronicsBS feedthroughs and in-vac cables installed[Paco, Yehonathan, Chub]

The BS chamber 10" flange
with 4 DSUB-25 feedthroughs has been installed
  
  16575   Tue Jan 11 15:21:16 2022 AnchalUpdateBHDPR2 transmission calculationI did this simple calculation where I assumed
1W power from laser and 10% transmission
past IMC. We would go ahead with V6-704/V6-705
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPRS_Trans_Calc.ipynb.zip 
  16577   Tue Jan 11 18:18:29 2022 AnchalSummaryBHDAttempted OSEM installation on AS1[Anchal, Paco, Yehonathan]

Connected in-cir cable to new flange
on ITMY Chamber
  
  16578   Tue Jan 11 18:40:25 2022 AnchalSummaryBHDAS1 Sat Amp has a PCB issueAS1
Sat Amp (S2100741) has a critical PCB
issue on it's Ch5-8 board S2100548. This
 signal-2022-01-11-184917.jpeg 
  16579   Thu Jan 13 09:48:41 2022 AnchalSummaryBHDAS1 Sat Amp fixedI fixed the issue in AS1
Sat Amp (S2100741) by using a razor blade.
I cut the short between the two places, cleaned
 signal-2022-01-13-094823_001.jpegsignal-2022-01-13-094823_002.jpeg 
  16580   Thu Jan 13 12:24:08 2022 AnchalSummaryBHDAS1 SD and LR magnets broke[Anchal (vacuum work), Paco (outside)]

After the AS1 Sat Amp fix (40m/16579),
we today were able to tune all OSEMs to the
  
  16581   Thu Jan 13 12:29:27 2022 AnchalSummaryBHDAS4 LR magnet brokeAfter the debacle with AS1 (40m/16580),
we decided the put the PEEK earthquake stop
by first removing the lower OSEM plate and
  
  16582   Thu Jan 13 16:08:00 2022 YehonathanUpdateBHDgluing magnets after AS1/4 misfortune{Yehonathan, Anchal, Paco}

In the cleanroom, we removed AS1
and AS4 from their SOS towers. We removed
  
  16583   Thu Jan 13 17:10:55 2022 AnchalUpdateBHDPR2 transmission calculationI corrected the calculation by adding losses
by the arm cavity ends times the arm cavity
finesse and also taking into account the
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip 
  16584   Fri Jan 14 03:07:04 2022 KojiUpdateBHDPR2 transmission calculationI opened the notebook but I was not sure
where you have the loss per bounce for the
arm cavity.
  
  16585   Fri Jan 14 11:00:29 2022 AnchalUpdateBHDPR2 transmission calculationYeah, I counted the loss from arm cavities
as the transmission from ETMs on each bounce.
I assumed Michelson to be perfectly aligned
  
  16586   Fri Jan 14 12:01:21 2022 AnchalUpdateElectronicsBS & ITMY feedthroughs labeled and connected to Sat AmpsI labeled all the newly installed flanges
and connected the in-air cables (40m/16530)
to appropriate ports. These cables are connected
  
  16587   Fri Jan 14 13:46:25 2022 AnchalUpdateBHDPR2 transmission calculation updatedI updated the arm cavity roundtrip losses
due to scattering. Yehonathan told me that
arm cavity looses 50ppm every roundtrip other
 LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip 
  16588   Fri Jan 14 14:04:51 2022 PacoUpdateElectronicsRFSoC 2x2 board arrivedThe Xilinx RFSoC 2x2 board arrived right
before the winter break, so this is kind
of an overdue elog. I unboxed it, it came
 PXL_20220114_211249499.jpg 
  16589   Fri Jan 14 17:33:10 2022 YehonathanUpdateBHDAS4 resurrection{Yehonathan, Anchal}

Came this morning, the gluing of
the magnets was 100% successful. Side blocks,
 AS4_roll_balance2.pngAS4_magnet_height2.pngFreeSwingingSpectra.pdf 
  16590   Fri Jan 14 18:12:47 2022 AnchalSummaryBHDAS4 placed in ITMY Chamber, OSEMs connectedAS4 was succesfully suspended and trasported
to ITMY chamber (40m/16589).
We placed it near the door to make it easy
  
  16591   Tue Jan 18 14:26:09 2022 PacoSummaryBHDPart IX of BHR upgrade - Placed remaining filters SR2, PR3, PR2[Anchal, Paco]

Added input filters, input matrix,
damping filters, output matrix, coil filters,
  
  16592   Tue Jan 18 15:19:49 2022 PacoSummaryBHDPart IV of BHR upgrade - Replaced old SR3 with SOS SR2. OSEM tuning attemtped.[Tega, Anchal, Paco]

We started working on SR2 installation.
Preliminary work involved
 PXL_20220119_012954365.jpgPXL_20220119_013003522.jpg 
  16593   Tue Jan 18 18:16:28 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 Sat Amp Box inspectionI tested the monitor ports on the SR2
Sat Amp Box but found that all LED Mon
and PD Mon are giving expected values. I
  
  16594   Tue Jan 18 18:19:22 2022 KojiSummaryBHDAS4 placed in ITMY Chamber, OSEMs connectedAS4 satellite amplifier D1002818
/ D080276 troubleshoot

I dug into the circuit to see what/where
 Screen_Shot_2022-01-18_at_17.48.16.pngcable_swap.png 
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