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40m Log |
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Tue Feb 22 18:47:51 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 
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Fri Feb 25 14:00:08 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 
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Fri Feb 25 14:48:53 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 
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Sat Feb 26 23:48:14 2022, Koji, Update, SUS, ETMY SUS Electronics Replacement
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Mon Feb 28 15:51:07 2022, Ian MacMillan, Update, SUS, ETMY 1Y4 Electronics Replacement   
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Thu Mar 3 04:11:36 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement  
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Thu Mar 3 04:24:23 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement 
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Thu Mar 3 17:21:11 2022, Ian MacMillan, Update, SUS, ETMY 1Y4 Electronics Replacement
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Sat Mar 5 02:03:46 2022, Koji, Update, SUS, ETMY 1Y4 Electronics Replacement 6x
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Mon Mar 21 14:22:52 2022, Anchal, Update, SUS, ETMY Alignmnet offsets needed to be changed
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Tue Mar 1 19:26:24 2022, Koji, Update, SUS, ETMY SUS Electronics Replacement 
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Mon Mar 7 16:44:15 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement 6x
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Fri Mar 11 16:43:03 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement
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Fri Mar 25 11:39:14 2022, Anchal, Update, SUS, ETMY SUS Electronics Replacement - Questions
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Mon Mar 28 16:25:34 2022, Ian MacMillan, Update, SUS, ETMY SUS Electronics Replacement - Questions
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Thu Mar 17 11:40:41 2022, Paco, Update, SUS, ETMY green PZT HV supply
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Message ID: 16746
Entry time: Mon Mar 28 16:25:34 2022
In reply to: 16743
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Author: |
Ian MacMillan |
Type: |
Update |
Category: |
SUS |
Subject: |
ETMY SUS Electronics Replacement - Questions |
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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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