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Entry  Fri Aug 25 11:11:26 2017, gautam, Update, General, MC1 kicked again MC1_glitch.png
    Reply  Thu Aug 31 21:40:24 2017, gautam, Update, General, MC1 kicked again MC1_glitch.png
       Reply  Fri Sep 1 08:25:08 2017, Steve, Update, SUS, MC1 glitching MC1glitching.pngMC1kicks.png
          Reply  Fri Sep 1 16:27:39 2017, gautam, Update, SUS, MC1 glitching 
Message ID: 13284     Entry time: Fri Sep 1 08:25:08 2017     In reply to: 13283     Reply to this: 13286
Author: Steve 
Type: Update 
Category: SUS 
Subject: MC1 glitching 

MC1, MC2 and MC3 damping turned off to see glitching action at 9:57am


There was a pretty large glitch in MC1 about an hour ago. The misalignment was so large that the autolocker wasn't able to lock the IMC. I manually re-aligned MC1 using the bias sliders, and now IMC locks fine. Attached is a 90 second plot of 2K data from the OSEMs showing the glitch. Judging from the wall StripTool, the IMC was well behaved for ~4 hours before this glitch - there is no evidence of any sort of misalignment building up, judging from the WFS control signals.


Attachment 1: MC1glitching.png  104 kB  | Hide | Hide all
Attachment 2: MC1kicks.png  43 kB  Uploaded Fri Sep 1 10:12:42 2017  | Hide | Hide all
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