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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: 16709     Entry time: Mon Mar 7 16:44:15 2022     In reply to: 16675     Reply to this: 16723
Author: Ian MacMillan 
Type: Update 
Category: SUS 
Subject: ETMY SUS Electronics Replacement 

Now that the ETMSUS is back up and running I reran my measurements from the beginning of the process. The results below show a change in gain between the before and after measurements. I have given values of the low-frequency section below.

Average Gain difference from the TFs: 18.867  (excluding thee side change)

  Before After Gain difference
UL -31 dB -5 dB 19.952
UR -36 dB -10 dB 19.952
LR -27 dB -2 dB 17.782
LL -37 dB -12 dB 17.782
SIDE -48 dB -45 dB 1.412

I also am noting the new values for the OSEM DC output: average gain increase: 9.004

OSEM DC OFFSET Before DC OFFSET After Gain increase
UL 557 5120 9.19
UR 568 5111 8.99
LR 780 7041 9.02
LL 385 3430 8.91
SD 328 2922 8.91

In addition, the oplev position was:

  Before After
 OPLEV_PERROR -16.055 -16.715
 OPLEV_YERROR -6.667 -16.597

All data and settings have been included in the zip file

From the average gain increase of the TFs which indicates the increase of the whole system and the increase in gain from the OSEM we can calculate the gain from the actuators.

18.867/9.004 = 2.09

thus the increase in gain on the actuator is about 2.09

EDIT: I updated the side TF with one with better SNR. I increased the excitation amplitude.

Attachment 1: UR_TF_Graph.pdf  26 kB  | Hide | Hide all
UR_TF_Graph.pdf
Attachment 2: UL_TF_Graph.pdf  26 kB  | Hide | Hide all
UL_TF_Graph.pdf
Attachment 3: LR_TF_Graph.pdf  25 kB  | Hide | Hide all
LR_TF_Graph.pdf
Attachment 4: LL_TF_Graph.pdf  26 kB  | Hide | Hide all
LL_TF_Graph.pdf
Attachment 5: SD_TF_Graph.pdf  27 kB  Uploaded Tue Mar 8 14:31:37 2022  | Hide | Hide all
SD_TF_Graph.pdf
Attachment 6: 20220307_SUSElectronicsAfterTests.zip  210 kB  Uploaded Tue Mar 8 14:53:41 2022
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