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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: 16746     Entry time: Mon Mar 28 16:25:34 2022     In reply to: 16743
Author: Ian MacMillan 
Type: Update 
Category: SUS 
Subject: ETMY SUS Electronics Replacement - Questions 

The point of changing the gains was to return the system to its origional state. ie I wanted the over all gain of the physical components to be the same as when we started. From the CDS side of things nothing else should be changed. The damping filters should remain at their origional values. The cts2um filter was changed to counteract a change in the electronics (replacing them). These changes should cancel eachother out. As for the side control, on 3/4/22 koji reduced the output resistors for the 4 face OSEMs but did not change the the SD one. there fore the SD did not need the same adjustment as the others.

Quote:

After Ian updated the cts2um filters for OSEM, shouldn't the damping gains be increased back by factor of 10 to previos values? Was the damping gain for SIDE ever changed? we found it at 250.

Can you explain why gain_offset filter was required and why this wasn't done for the side coil?

Quote:

I updated the gain of the ct2um filter on the OSEMS for ETMY and decreased their gain by a factor of 9 from 0.36 to 0.04.

I added a filter called "gain_offset" to all the coils except for side and added a gain of 0.48.

together these should negate the added gain from the electronics replacement of the ETMY

 

 

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