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  40m Log, Page 316 of 344  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  16281   Tue Aug 17 04:30:35 2021 KojiUpdateSUSNew electronicsReceived:

Aug 17, 2021 2x ISC Whitening

Delivered 2x Sat Amp board to Todd
 P_20210816_234136.jpgP_20210816_235106.jpgP_20210816_234220.jpg 
  16296   Wed Aug 25 08:53:33 2021 JordanUpdateSUS2" Adapter Ring for SOS Arrived 8/24/218 of the 2"->3" adapter rings
(D2100377) arrived from RDL yesterday. I
have not tested the threads but dimensional
 20210824_152259.jpg20210824_152259.jpg20210824_152308.jpg 
  16326   Tue Sep 14 16:12:03 2021 JordanUpdateSUSSOS Tower HardwareYehonathan noticed today that the silver
plated hardware on the assembled SOS towers
had some pretty severe discoloration on it.
 20210914_160111.jpg 
  16328   Tue Sep 14 17:14:46 2021 KojiUpdateSUSSOS Tower HardwareYup this is OK. No problem.

 
  
  16342   Fri Sep 17 20:22:55 2021 KojiUpdateSUSEQ M4.3 Long beachEQ  M4.3 @longbeach
2021-09-18 02:58:34 (UTC) / 07:58:34
(PDT)
  
  16343   Mon Sep 20 12:20:31 2021 PacoSummarySUSPRM and BS Angular Actuation transfer function magnitude measurements[yehonathan, paco, anchal]

We attempted to find any symptoms
for actuation problems in the PRMI configuration
 PRM_PIT_ACT_TF.pdfPRM_YAW_ACT_TF.pdfBS_PIT_ACT_TF.pdfBS_YAW_ACT_TF.pdf 
  16345   Mon Sep 20 14:22:00 2021 ranaSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsI suggest plotting all the traces in the
plot so we can see their differences. Also
remove the 1/f^2 slope so that we can see
  
  16358   Thu Sep 23 15:29:11 2021 PacoSummarySUSPRM and BS Angular Actuation transfer function magnitude measurements[Anchal, Paco]

We had a second go at this with
an increased number of averages (from 10
 BS_PRM_ANG_ACT_TF.pdf 
  16364   Wed Sep 29 09:36:26 2021 JordanUpdateSUS2" Adapter Ring Parts for SOS Arrived 9/28/21The remaining machined parts for the SOS
adapter ring have arrived. I will inspect
these today and get them ready for C&B.
 20210929_092418.jpg 
  16371   Fri Oct 1 14:25:27 2021 yehonathanSummarySUSPRM and BS Angular Actuation transfer function magnitude measurements{Paco, Yehonathan, Hang}

We measured the sensing PRMI sensing
matrix. Attachment 1 shows the results, the
 MICH_PRM_-0.34.pngMICH_PRM_-0.1.png 
  16374   Mon Oct 4 16:00:57 2021 YehonathanSummarySUSPRM and BS Angular Actuation transfer function magnitude measurements{Yehonathan, Anchel}

In an attempt to fix the actuation
of the PRMI DOFs we set to modify the output
 BS_PRM_ANG_ACT_TF_20211004.pdfBS_out_mat_20211004.txtPRM_out_mat_20211004.txt 
  16375   Mon Oct 4 16:10:09 2021 ranaSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsnot sure that this is necessary.
If you look at teh previous entries Gautam
made on this topic, it is clear that the
  
  16383   Tue Oct 5 20:04:22 2021 PacoSummarySUSPRM and BS Angular Actuation transfer function magnitude measurements[Paco, Rana]

We had a look at the BS actuation.
Along the way we created a couple of issues
  
  16384   Wed Oct 6 15:04:36 2021 HangUpdateSUSPRM L2P TF measurement & Fisher matrix analysis[Paco, Hang]

Yesterday afternoon Paco and I
measured the PRM L2P transfer function.
 prm_l2p_tf_meas.pdfprm_l2p_fisher_vs_data.pdfprm_l2p_Pxx_evol.pdfprm_l2p_fisher_evol.pdf 
  16385   Wed Oct 6 15:39:29 2021 AnchalSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsNote that your tests were done with the
output matrix for BS and PRM in the compensated
state as done in 40m/16374.
  
  16388   Fri Oct 8 17:33:13 2021 HangUpdateSUSMore PRM L2P measurements[Raj, Hang]

We did some more measurements on
the PRM L2P TF. 
 Screenshot_2021-10-08_17-30-52.png 
  16389   Mon Oct 11 11:13:04 2021 ranaUpdateSUSMore PRM L2P measurementsFor the oplev, there are DQ channels you
can use so that its possible to look back
in the past for long measurements. They have
  
  16390   Mon Oct 11 13:59:47 2021 HangUpdateSUSMore PRM L2P measurementsWe report here the analysis results for
the measurements done in elog:16388. 
 prm_l2p_tf_meas_white.pdfprm_l2p_tf_meas_opt.pdfprm_l2p_fisher_vs_data_white_vs_opt.pdfprm_l2p_Pxx_evol_v2.pdf 
  16393   Tue Oct 12 11:32:54 2021 YehonathanSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsLate submission (From Thursday 10/07):

I measured the PRMI sensing matrix
to see if the BS and PRMI output matrices
 modified_output_matrices_radar_plots.pngnormal_output_matrices_radar_plots.png 
  16394   Tue Oct 12 16:39:52 2021 ranaSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsshould compare side by side with the ITM
PRMI radar plots to see if there is a difference.
How do your new plots compare with Gautam's
  
  16402   Thu Oct 14 13:40:49 2021 YehonathanSummarySUSPRM and BS Angular Actuation transfer function magnitude measurementsHere is a side by side comparison of the
PRMI sensing matrix using PRM/BS actuation
(attachment 1) and ITMs actuation (attachment
 BSPRM_Actuation_Radar_plots.pngITM_Actuation_Radar_plots.png 
  16419   Thu Oct 21 11:38:43 2021 JordanUpdateSUSStandoffs for Side Magnet on 3" Adapter Ring SOS AssemblyI had 8 standoffs made at the Caltech chemistry
machine shop to be used as spacers for the
side magnets on the 3" Ring assembly.
 Magnet_Standoffs.jpg 
  16447   Wed Nov 3 16:55:23 2021 Ian MacMillanSummarySUSSUS Plant Plan for New Optics[Ian, Tega, Raj]

This is the rough plan for the
testing of the new suspension models with
  
  16449   Thu Nov 4 18:29:51 2021 TegaUpdateSUSSetting up suspension test model[Ian,Tega]

Today we continued working on setting
up the 6 degrees of freedom model for
  
  16451   Fri Nov 5 12:49:32 2021 ranaUpdateSUSSetting up suspension test modelPlease don't put it on c1sus2. Put
it on the completely independent test stand
as we discussed Wednesday. You must
  
  16457   Mon Nov 8 17:52:22 2021 Ian MacMillanUpdateSUSSetting up suspension test model[Ian, Tega]

We combined a controler and a plant
model into a single modle (See first attachment)
 x1sus_cp.png 
  16464   Thu Nov 11 00:11:39 2021 KojiSummarySUS2" to 3" sleeve issueYehonathan and Tega found that the new
PR3 and SR3 delivered in 2020 is in fact 3/4"
 6x 
  16467   Tue Nov 16 11:37:26 2021 HangHowToSUSFitting suspension model--large systematic errorsOne goal of our sysID study is to improve
the aLIGO L2A feedforward. Our algorithm
currently improves only the statistical uncertainty
 L2L_L3P_fit.pdfL2L_L3P_residual.pdf 
  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 
  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
  
  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 
  16525   Sun Dec 19 07:52:51 2021 AnchalUpdateSUSRemaining task for 2021The I/O chassis reassigns the ADC and DAC
indices on every power cycle. When we moved
it, it must have changed it from the order
  
  16534   Wed Dec 22 18:16:23 2021 KojiUpdateSUSRemaining task for 2021The in-vacuum installation team has reported
that the side OSEMs of ITMX and LO1 are going
to be interfering if place LO1 at the planned
 ITMX_2016_07_21.jpgScreen_Shot_2021-12-22_at_18.03.42.png 
  16538   Sun Jan 2 20:46:46 2022 KojiUpdateSUSEnd SUS Electronics building19:00~ Start working on the electronics
bench

The following units were tested
 PXL_20220103_081133119.jpg 
  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 
  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
  
  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
  
  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
  
  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
  
  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
  
  16675   Tue Feb 22 18:47:51 2022 Ian MacMillanUpdateSUSETMY SUS Electronics Replacement[Ian, Koji]

In preparation for the replacement
of the suspension electronics that control
 ALL_TF_Graph.pdf20220222_SUSElectronicsReplacement.7z 
  16680   Fri Feb 25 14:00:08 2022 Ian MacMillanUpdateSUSETMY SUS Electronics Replacement[Koji, Ian]

We looked at a few power supplies
and we found one that was marked "CHECK
 IMG_0853.jpgIMG_0852.jpg 
  16681   Fri Feb 25 14:48:53 2022 Ian MacMillanUpdateSUSETMY SUS Electronics ReplacementI moved the network-enabled power strip
from above the power supplies on rack 1y4
to below. Nothing was powered through the
 Before.jpgAfter.jpg 
  16684   Sat Feb 26 23:48:14 2022 KojiUpdateSUSETMY SUS Electronics Replacement[Ian, Koji] - Activity
on 25th (Fri)

We continued working on
 PXL_20220226_023111179_2.jpg 
  16687   Mon Feb 28 15:51:07 2022 Ian MacMillanUpdateSUSETMY 1Y4 Electronics Replacement[Paco, Ian]

paco helped me wire the ETMY 1Y4
rack. We wired the following (copied from
 IMG_0865.jpgIMG_0867.jpgIMG_0868.jpgIMG_0866.jpg 
  16690   Tue Mar 1 19:26:24 2022 KojiUpdateSUSETMY SUS Electronics ReplacementThe replacement key switches and Ne Indicators
came in. They were replaced and work fine
now.
 PXL_20220302_025723651.jpgPXL_20220302_030102033.MP.jpg 
  16695   Thu Mar 3 04:11:36 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementFor the Y-end electronics replacement,
we want to remove unused power supplies.
In fact, we already removed the +/-5V supplies
 PXL_20220303_082726693.jpgPXL_20220303_082752494.jpgPXL_20220303_082744464.jpg 
  16696   Thu Mar 3 04:24:23 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementThe DC power strip at Y-end was connected
to the bottom two Sorensen power supplies.
They are configured to provide +/-18V.
 PXL_20220303_094421604.jpgPXL_20220303_094435127.jpg 
  16699   Thu Mar 3 17:21:11 2022 Ian MacMillanUpdateSUSETMY 1Y4 Electronics Replacement[Koji, Ian]

1) We attached the 30 coil driving
cables to the vacuum feed through to the
  
  16703   Sat Mar 5 02:03:46 2022 KojiUpdateSUSETMY 1Y4 Electronics ReplacementOplev saga

Summary 

- The new coil driver had not enough
 6x 
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