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ID Date Author Type Category Subject Text Attachments
  16624   Tue Jan 25 18:37:12 2022 TYehonathanUpdateBHDPR2 SuspensionPR2's side magnet height was adjusted
and its roll was balanced (attachment 1,2).
I verified that the OpLev beam is still aligned.
 PR2_magnet_height.pngPR2_roll_balance.pngFreeSwingingSpectra_div_50mV.pdf 
  16623   Tue Jan 25 16:42:03 2022 AnchalSummaryBHDReduced filter gains in all damped new SOSI noticed that our current suspension damping
loops for the new SOS were railing the DAC
outputs. The reason being that cts2um module
  
  16622   Tue Jan 25 11:02:54 2022 AnchalSummaryBHDPart IX of BHR upgrade - AS1 free swing test failedFor some reasonf the free swing test showed
only one resonance peak (see attachment 1).
This probably happened because one of the
 AS1_freeSwingTestFailed.pdf 
  16621   Tue Jan 25 10:55:02 2022 AnchalSummaryBHDPart VIII of BHR upgrade - LO2 input matrix diagonalization performed.The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py)
  
  16620   Mon Jan 24 21:18:40 2022 PacoSummaryBHDPart IX of BHR upgrade - AS1 placed and OSEM tuned[Paco]

AS1 was installed in the ITMY chamber
today. For this I moved AS4 to its nominal
  
  16619   Mon Jan 24 20:48:48 2022 AnchalUpdateBHDAS4 Input Matrix Diagonalization performed. I agree. That's an interesting idea.
But does that mean that there is an always
working inverse matrix solution or that any
  
  16618   Mon Jan 24 18:53:09 2022 AnchalSummaryBHDPart VIII of BHR upgrade - LO2 placed and OSEMs tunedI placed LO2 in its planned position in
BS chamber, inserted the OSEMs, and tuned
their position to halfway brightness. At
  
  16617   Mon Jan 24 17:58:21 2022 YehonathanUpdateBHDPR2 SuspensionI picked up the PR2 mirrors (labeled M1,
M2) from Anchel's table and took them
to the cleanroom. By inspection, I spotted
  
  16616   Mon Jan 24 17:12:27 2022 ranaUpdateBHDAS4 Input Matrix Diagonalization performed. I think our
suspension input matrix diagonalization is
not so robust usually because
  
  16615   Mon Jan 24 17:10:25 2022 TegaSummaryComputer Scripts / ProgramsSUS Plant Plan for New Optics[Ian, Tega]

Connected the New SUS screens to
the controller for the simplant model. Because of
 Screen_Shot_2022-01-24_at_5.33.15_PM.png 
  16614   Mon Jan 24 12:33:41 2022 ranaConfigurationWikiAIC Wiki: txz files allowedI updated the mime.local.conf file for
the AIC Wiki so as to allow attachments with
the .txz
  
  16613   Fri Jan 21 16:40:10 2022 AnchalUpdateBHDAS4 Input Matrix Diagonalization performed. The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py)
 AS4_SUS_InpMat_Diagnolization_20220121.pdfAS4_FreeSwingData_PeakFitting_20220121.pdf 
  16612   Fri Jan 21 14:51:00 2022 KojiUpdateBHDV6-704/705 Mirror now @DownsCamille@Downs measured the surface of these
M1 and M2 using Zygo.
 M1.PNGM1_30mm.PNGM2.PNGM2_30mm.PNG 
  16611   Fri Jan 21 12:46:31 2022 TegaUpdateCDSSUS screen debuggingAll done (almost)! I still have not sorted
the issue of pitch and yaw gains growing
together when modified using ramping time.
 Custom_ADC_DAC_monitors.png 
  16610   Fri Jan 21 11:24:42 2022 AnchalSummaryBHDSR2 Input Matrix Diagonalization performed. The free swinging test
was successful. I ran the input matrix diagonalization
code (
 SR2_SUS_InpMat_Diagnolization_20220121.pdfSR2_FreeSwingData_PeakFitting_20220121.pdf 
  16609   Thu Jan 20 18:41:55 2022 AnchalSummaryBHDSR2 set to trigger free swing testSR2 is set to go through a free swinging
test at 3 am tonight. We have used this script
(Git/40m/scripts/SUS/InMatCalc/freeSwing.py)
  
  16608   Thu Jan 20 18:16:29 2022 AnchalUpdateBHDAS4 set to trigger free swing testAS4 is set to go through a free swinging
test at 10 pm tonight. We have used this
script (Git/40m/scripts/SUS/InMatCalc/
  
  16607   Thu Jan 20 17:34:07 2022 KojiUpdateBHDV6-704/705 Mirror now @DownsThe PR2 candidate V6-704/705 mirrors (Qty2)
are now @Downs. Camille picked them up for
the measurements.
 PXL_20220120_225248265_2.jpgPXL_20220120_225309361_2.jpg 
  16606   Thu Jan 20 17:21:21 2022 TegaUpdateSUSTemporary watchdogTemp software watchdog now operational
for LO1 and the remaining optics!

Koji helped me understand how to
  
  16605   Thu Jan 20 17:03:36 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuned.The main issue with SR2 OSEMs, now that
I think of it, was that the BS table was
very inclined due to the multiple things
 DJI_0144.JPG 
  16604   Thu Jan 20 16:42:55 2022 PacoUpdateBHDAS4 OSEMs installation - part 2[Paco]

Turns out, the shifting was likely
due to the table level. Because I didn't
  
  16603   Thu Jan 20 12:10:51 2022 YehonathanUpdateBHDAS1 resurrectionI was wondering whether I should take AS1
down to redo the wire clamping on the side
blocks. I decided to take the OpLev spectrum
 FreeSwingingSpectra.pdfFreeSwingingSpectra_div_20mV.pdfFreeSwingingSpectra_div_50mV.pdf 
  16602   Thu Jan 20 01:48:02 2022 KojiUpdateBHDPR2 transmission calculation updatedIMC is not such lossy. IMC output is supposed
to be ~1W.

The critical coupling condition
  
  16601   Thu Jan 20 00:26:50 2022 KojiUpdateSUSTemporary watchdogAs the new db is made for c1susaux, 1)
it needs to be configured to be read by c1susaux
2) it requires restarting c1susaux 3) it
  
  16600   Wed Jan 19 21:39:22 2022 TegaUpdateSUSTemporary watchdogAfter some work on the reference database
file, we now have a template for temporary
watchdog implementation for LO1 located here
  
  16599   Wed Jan 19 18:15:34 2022 YehonathanUpdateBHDAS1 resurrectionToday I suspended AS1. Anchal helped me
with the initial hanging of the optics. Attachments
1,2 show the roll balance and side magnet
 AS1_roll_balance2.pngAS1_magnet_heigh2.pngFreeSwingingSpectra.pdfIMG_6324.JPG 
  16598   Wed Jan 19 16:22:48 2022 AnchalUpdateBHDPR2 transmission calculation updatedI have further updated my calculation.
Please find the results in the attached pdf.

Following is the description of
 PR2transmissionSelectionAnalysis.pdfPR2_Trans_Calc.ipynb.zip 
  16597   Wed Jan 19 14:41:23 2022 KojiUpdateBHDSuspension StatusIs this the correct status? Please
directly update this entry.


  
  16596   Wed Jan 19 12:56:52 2022 PacoSummaryBHDAS4 OSEMs installation[Paco, Tega, Anchal]

Today, we started work on AS4 SOS
by checking the OSEM and cable. Swapping
  
  16595   Wed Jan 19 12:50:10 2022 AnchalSummaryBHDPart IV of BHR upgrade - SR2 OSEM tuning progress.It was indeed the issue of the top OSEM
plate not being in the right place horizontally.
But the issue was more non-trivial. I believe
  
  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 
  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
  
  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 
  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,
  
  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
  
  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 
  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 
  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 
  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
  
  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
  
  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.
  
  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 
  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
  
  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
  
  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
  
  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 
  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 
  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
  
  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 
  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
  
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