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Entry  Fri Aug 24 20:48:10 2012, Koji, Update, PSL, PMC aligned 
    Reply  Tue Aug 28 00:23:54 2012, Jenne, Update, PSL, PMC alignment going bad PMC_transmission_GoingDown_27Aug2012.png
       Reply  Tue Aug 28 11:28:31 2012, ericq, Update, PSL, PMC alignment going bad 
Message ID: 7294     Entry time: Tue Aug 28 11:28:31 2012     In reply to: 7292
Author: ericq 
Type: Update 
Category: PSL 
Subject: PMC alignment going bad 

Quote:

PMC transmission started going down this afternoon, around 3pm-ish.  Right now it's 0.775, which is very, very low.  The new MC locking stuff is engaged, so it's not the FSS slow servo's fault. 

EDIT: I just realized that the limit of 0 counts output of the MC2 MCL filter bank was still engaged, from a time earlier this afternoon when I had switched back to the old servo, so there was no feedback going back to keep the slow drift of the laser in check.  PMC trans isn't coming back instantly, so I'll check it again when I come in tomorrow.

 

By adjusting the PMC steering mirrors, Jenne and I realigned the PMC input beam. Transmission is at 0.829 now. 

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