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ID Date Authorup Type Category Subject Text Attachments
  16648   Mon Feb 7 09:00:26 2022 PacoUpdateGeneralScheduled power outage recovery[Paco]

Started recovering from scheduled
(Feb 05) power outage. Basically, time-reversing
  
  16655   Wed Feb 9 16:43:35 2022 PacoUpdateGeneralScheduled power outage recovery - Locking mode cleaner(s)[Paco, Anchal]


We went in and measured
the power after the power splitting HWP at
  
  16669   Mon Feb 14 18:31:50 2022 PacoUpdateGeneralScheduled power outage recovery - IMC recovery progress[Paco, Anchal, Tega]

We have been realigning the IMC
as of last Friday (02/11). Today we made
  
  16670   Mon Feb 14 18:43:49 2022 PacoSummaryGeneralSOS materials clean room cleared[Yehonathan, Paco]

We put away most items used / involved
in SOS assembly and characterization. Many
  
  16689   Tue Mar 1 16:01:14 2022 PacoUpdateElectronicsRFSoC 2x2 board -- setup for remote work & BALUN saga[Tommy, Paco]

Since last week I've worked
with tommy on getting the RFSoC 2x2 board
 balun_adc1.pngPXL_20220302_001734121.jpg 
  16698   Thu Mar 3 17:09:46 2022 PacoUpdateBHDRe-susspension of AS1[Anchal, Paco]

Wire clamp spare was installed,
furthermore AS1 was reinstalled on adapter,
  
  16715   Tue Mar 8 19:29:36 2022 PacoUpdateBHDRe-balance of AS1[Paco]

Installed AS1 in vacuum, near the
center of the table, and installed the OSEMs.
  
  16716   Wed Mar 9 09:35:26 2022 PacoUpdateBHDRe-balance of AS1[Paco]

AS1 is installed, OSEMs balanced,
and the optic damped successfully. We should
  
  16722   Thu Mar 10 10:05:49 2022 PacoUpdateSUSAS1 free swing test[Paco, Ian]


Begin free swinging test
for AS1 at 10:05 AM, set for ~ 2.04 hours.

Test
 SUS_Input_Matrix_Diagonalization.pdf 
  16725   Tue Mar 15 10:45:31 2022 PacoUpdateGeneralAssembled small in-vac optics[Paco]

This morning I assembled LO3,
LO4 and AS3 (all
  
  16731   Thu Mar 17 11:40:41 2022 PacoUpdateSUSETMY green PZT HV supply[Anchal, Paco]

We installed a HV kepco power supply
for the green PZT steering the YAUX beam.
  
  16732   Thu Mar 17 16:50:53 2022 PacoUpdateBHDXARM AUX alignment[Ian, Paco]

We opened the ITMX chamber and


Inspected PR2 and LO1 and
  
  16735   Fri Mar 18 17:15:19 2022 PacoUpdateBHDXARM AUX alignment cont.[Paco, Ian]

First, we re-balanced the ITMX
OSEMs so that they would damp at around half-a-shadow.
 Screen_Shot_2022-03-18_at_4.09.38_PM.png 
  16745   Sat Mar 26 13:04:38 2022 PacoSummaryBHDPart IIa of BHR upgrade - Green laser alignment on YarmI came for a bit to check on the "1Y0
burning smell" reported by Koji last
evening. I agree that there's a toasty
  
  16748   Tue Mar 29 17:35:54 2022 PacoUpdateSUSDamping fix on BS, AS4, PR2, and PR3[Ian, Paco]


We removed the "cheby"
filters from AS4, PR2 and PR3 which had been
  
  16770   Mon Apr 11 21:13:21 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco, Koji]

I asked Koji for some advice regarding
closing the loop on YARM using POY11. A few
  
  16778   Thu Apr 14 10:18:35 2022 PacoSummaryBHD2 in oplev mirrors incompatible with LMR2V[Paco, JC]

We realized the 2 in oplev mirrors
(Thorlabs BB2-E02) for ITMYOL, SRMOL, and
  
  16780   Thu Apr 14 18:34:51 2022 PacoSummaryBHDITMY Oplev reinstalled (Re: 2 in oplev mirrors incompatible with LMR2V)[Paco, Yehonathan]

We installed ITMYOL1 and ITMYOL2
on the ITMY chamber. We aligned the ITMY
  
  16781   Thu Apr 14 18:39:13 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco]

In reply to Koji's questions;

Q1: What is the product number
  
  16786   Mon Apr 18 17:53:45 2022 PacoSummaryBHDPart IIa of BHR upgrade - POY11 debugging[Paco, Ian]

We aligned the X-arm IR laser


First fix pointing on the
  
  16788   Tue Apr 19 18:10:10 2022 PacoUpdateBHDPart V of BHR upgrade - POX11 path, LO path, and ITMX Oplev[Yuta, Paco]

We set up POX11 beam path from
ITMX chamber to the ITMX in-air table. To
 DJI_0167.JPGDJI_0169.JPGDJI_0168.JPG 
  16789   Wed Apr 20 08:20:22 2022 PacoUpdateBHDPart V of BHR upgrade - PR2 weirdnessYesterday, I tried tuning the PR2 damping
gains by increasing the gain until the damping
gave the ~5 oscillations (by watching the
  
  16797   Thu Apr 21 16:49:01 2022 PacoUpdateBHDPart V of BHR upgrade - BS Oplev + LO1 offset[Paco, JC, Yuta]

We aligned the BS oplev using the
new BSOL mirror pair. The main change is
  
  16821   Sat Apr 30 13:29:33 2022 PacoUpdateBHDPOX Beam issues --- fixed, ASL alignment on vertex chamber[Paco, Anchal, Yuta]

We opened the BSC and ITMX chamber
in the morning (Friday) to investigate POX11
  
  16844   Tue May 10 18:25:43 2022 PacoUpdateBHDGreen Transmission path[Yuta, Paco]

We installed GRX_SM1,
GRX_SM2, and finished aligning
  
  16847   Thu May 12 17:20:08 2022 PacoUpdateAlignmentPOP Beam on CCD[Paco]

Got POP beam centered on camera
and nominally on the two PDs. Attachment
 PXL_20220513_002047233.jpg 
  16852   Fri May 13 18:42:13 2022 PacoUpdateAlignmentITMX and ITMY sat amp failures[Yuta, Anchal, Paco]

As described briefly by JC, there
were multiple failure modes going during
  
  16861   Wed May 18 08:30:29 2022 PacoUpdateBHDSRM OpLev[Paco]

The SRM Oplev injection and detection
paths interfere heavily with the POY11. Due
  
  16864   Thu May 19 08:51:40 2022 PacoUpdateBHDSRM OpLev[Paco, Ian]

After agreement from Yuta/Anchal,
I moved POYM1 yaw to clear the aforementioned
  
  16868   Fri May 20 20:03:48 2022 PacoUpdateBHDITMY chamber work finished - LO and AS overlapped[Paco, Anchal, Yuta]

Today, in short we:


Recovered alignment of
 Screenshot_2022-05-20_20-38-25.pngOSEMs.txt 
  16869   Mon May 23 13:16:59 2022 PacoUpdateBHDEnd of vent - checks[Paco, Yuta]

Prep for closing and pump down.


Aligned IFO to maximize
 OSEMs20220523.txtScreenshot_2022-05-23_13-24-06_IFOaligned_GTRY_still_clipping_but_less.pngPR3position.JPG 
  16874   Wed May 25 16:56:44 2022 PacoConfigurationBHDIFO recovery - IMC alignment[Yuta, Paco]

We aligned IMC to recover the IFO
progressively. First step was to center the
  
  16881   Fri May 27 17:46:48 2022 PacoSummaryComputersCDS upgrade visit, downfall and rise of c1lsc models[Paco, Anchal-remote, Yuta, JC]

Sometime around noon today, right
after cds upgrade planning tour, c1lsc FE
  
  16885   Wed Jun 1 12:56:44 2022 PacoSummaryElectronicsSTEMlab 125 handout[Paco, Deeksha]

Yesterday I handed Deeksha a red
pitaya (stemlab 125 - 10) to begin her summer
  
  16887   Fri Jun 3 12:13:58 2022 PacoConfigurationCDSFix RFM channels [Paco, Yuta]

We tried fixing the issue of LSC_TRY
and LSC_TRX channels not working. We first
 SoGreen.png 
  16890   Sun Jun 5 19:46:40 2022 PacoUpdateLSCFixed IMC Trans sum issue[Paco]

Fixed the issue below:

  
  16892   Mon Jun 6 13:35:11 2022 PacoUpdateLSCFirst calibrated spectra of MICH at AS55 Q[Paco, Yuta]

On the topic of high AS55_Q RFPD
offset, it seems it stems from a small residual
 Screenshot_2022-06-06_17-30-16_MICHOLTF.pngCalibrated_MICH_ERR.pdf 
  16924   Thu Jun 16 18:23:15 2022 PacoConfigurationBHDRecovering LO beam in BHD DCPDs[Paco, Yuta]

We recovered the LO beam on the
BHD port. To do this, we first tried reverting
 Screenshot_2022-06-16_18-29-14_BHDLObeamISBACK.png 
  16945   Fri Jun 24 17:16:59 2022 PacoUpdateALSXAUX cable in control room[JC, Paco]

We took the long BNC cable that
ran from ETMX to ETMY and ran it from ETMX
  
  16956   Tue Jun 28 16:59:35 2022 PacoSummaryALSALS beat allan deviation (XARM)[Paco]

I took ~ 7 minutes of XALS beatnote
data with the XAUX laser locked to the XARM
 xbeat_1340469968.pdffrac_avar_xbeat.pdf 
  16962   Wed Jun 29 14:28:06 2022 PacoSummaryALSALS beat allan deviation (XARM)I guess it didn't make sense since
f_beat can be arbitrarily moved, but the
beat is taken around the PSL freq ~ 281.73
 frac_adev_xbeat.pdf 
  16965   Thu Jun 30 18:06:22 2022 PacoUpdateALSOptimum ALS recovery - part I[Paco]

In the morning I took some time
to align the AUX beams in the XEND table.
 als_ool_06_2022.png 
  16975   Wed Jul 6 19:58:16 2022 PacoSummaryNoiseBudgetXARM noise budget[Anchal, Paco, Rana]

We locked the XARM
using POX11
 xarm_nb_2022_07.pdf 
  16988   Mon Jul 11 19:29:23 2022 PacoSummaryGeneralFinalizing recovery -- timing issues, cds, MC1[Yuta, Koji, Paco]

Restarting
CDS

We were having
  
  16994   Tue Jul 12 19:46:54 2022 PacoSummaryALSHow (not) to take NPRO PZT transfer function[Paco, Deeksha, rana]

Quick elog for this evening:


Rana disabled MC servo
  
  16997   Wed Jul 13 12:49:25 2022 PacoSummarySUSSUS frozen[Paco, JC, Yuta]

This morning, while investigating
the source of a burning smell, we turned
  
  17007   Fri Jul 15 19:13:22 2022 PacoSummaryLSCFPMI with REFL/AS55 demod phase adjust[Yuta, Paco]


We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when
  
  17012   Mon Jul 18 16:39:07 2022 PacoSummaryLSCFPMI locking procedure using REFL55 and AS55[Yuta, Paco]

In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to
 DARM_07_18_2022_FMPI.pdfCARM_07_18_2022_FPMI.pdfMICH_07_18_2022_FPMI.pdffpmi_darm_nb_2022_07.pdf 
  17021   Wed Jul 20 11:58:45 2022 PacoSummaryGeneralJenne laser kaput?[Paco, Yehonathan, JC]

We were trying to setup the Jenne
laser to characterize the response of three
  
  17022   Wed Jul 20 14:12:07 2022 PacoSummaryGeneralJenne laser kaput![Koji, Yehonathan, Paco]

Koji pointed out that this laser
was always driven with a current driver (which
  
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