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Entry  Tue Feb 22 18:47:51 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement ALL_TF_Graph.pdf20220222_SUSElectronicsReplacement.7z
    Reply  Fri Feb 25 14:00:08 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement IMG_0853.jpgIMG_0852.jpg
       Reply  Fri Feb 25 14:48:53 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement Before.jpgAfter.jpg
          Reply  Sat Feb 26 23:48:14 2022, Koji, Update, SUS, ETMY SUS Electronics Replacement PXL_20220226_023111179_2.jpg
             Reply  Mon Feb 28 15:51:07 2022, Ian MacMillan, Update, SUS, ETMY 1Y4 Electronics Replacement IMG_0865.jpgIMG_0867.jpgIMG_0868.jpgIMG_0866.jpg
                Reply  Thu Mar 3 04:11:36 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement PXL_20220303_082726693.jpgPXL_20220303_082752494.jpgPXL_20220303_082744464.jpg
                   Reply  Thu Mar 3 04:24:23 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement PXL_20220303_094421604.jpgPXL_20220303_094435127.jpg
                      Reply  Thu Mar 3 17:21:11 2022, Ian MacMillan, Update, SUS, ETMY 1Y4 Electronics Replacement 
                         Reply  Sat Mar 5 02:03:46 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement 6x
                            Reply  Mon Mar 21 14:22:52 2022, Anchal, Update, SUS, ETMY Alignmnet offsets needed to be changed 
       Reply  Tue Mar 1 19:26:24 2022, Koji, Update, SUS, ETMY SUS Electronics Replacement PXL_20220302_025723651.jpgPXL_20220302_030102033.MP.jpg
    Reply  Mon Mar 7 16:44:15 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 6x
       Reply  Fri Mar 11 16:43:03 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 
          Reply  Fri Mar 25 11:39:14 2022, Anchal, Update, SUS, ETMY SUS Electronics Replacement - Questions 
             Reply  Mon Mar 28 16:25:34 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement - Questions 
    Reply  Thu Mar 17 11:40:41 2022, Paco, Update, SUS, ETMY green PZT HV supply 
Message ID: 16675     Entry time: Tue Feb 22 18:47:51 2022     Reply to this: 16680   16709   16731
Author: Ian MacMillan 
Type: Update 
Category: SUS 
Subject: ETMY SUS Electronics Replacement 

[Ian, Koji]

In preparation for the replacement of the suspension electronics that control the ETMY, I took measurments of the system excluding the CDS System. I took transfer functions from the input to the coil drivers to the output of the OSEMs for each sensor: UL, UR, LL, LR,  and SIDE. These graphs are shown below as well as all data in the compressed file.

We also had to replace the oplev laser power supply down the y-arm. The previous one was not turning on. the leading theory is that it's failure was caused by the power outage. We replaced it with one Koji brought from the fiber display setup.

I also am noting the values for the OSEM DC output

 OSEM  Value
 UL  557
 UR 568
 LR 780
 LL 385
 SIDE 328

In addition the oplev position was:

 OPLEV_POUT  4.871
 OPLEV_YOUT  -0.659
 OPLEV_PERROR  -16.055
 OPLEV_YERROR  -6.667

(KA ed) We only care about PERROR and YERROR (because P/YOUT are servo output)

Edit: corrected DC Output values

Attachment 1: ALL_TF_Graph.pdf  56 kB  | Hide | Hide all
ALL_TF_Graph.pdf ALL_TF_Graph.pdf ALL_TF_Graph.pdf ALL_TF_Graph.pdf ALL_TF_Graph.pdf
Attachment 2: 20220222_SUSElectronicsReplacement.7z  349 kB
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