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 Thu Oct 17 16:49:53 2019, gautam, Update, ASC, PRMI ASC - first pass 
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 Tue Oct 22 17:35:30 2019, gautam, Update, ASC, PRMI ASC - first pass
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Wed Oct 23 11:14:21 2019, gautam, Update, ASC, PRMI ASC with QPD signals normalized.
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Message ID: 14985
Entry time: Tue Oct 22 17:35:30 2019
In reply to: 14976
Reply to this: 14988
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| Author: |
gautam |
| Type: |
Update |
| Category: |
ASC |
| Subject: |
PRMI ASC - first pass |
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I made a change to the c1ass model to normalize the PIT and YAW POP QPD outputs by the SUM channel. A saturation block is used to prevent divide-by-zero errors, I set the saturation limits to [1,1e5], since the SUM channel is being recorded as counts right now. Model change is shown in the attached screenshots. I compiled and installed the model. Ran the reboot script to reboot all the vertex FEs to avoid the issue of crashing c1lsc.
| Quote: |
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I tried implementing a basic PRMI ASC using the POP QPD as a sensor. The POP22 buildup RMS is reduced by a factor of a few. This is just a first attempt, I think the loop shape can be made much better, but the stability of the lock is already pretty impressive. For some past work, see here.
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