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Entry  Tue Aug 12 02:09:39 2014, ericq, Update, General, Reasonable alignment restored 
    Reply  Tue Aug 12 14:29:01 2014, ericq, Update, General, Reasonable alignment restored OLtrend.png
Message ID: 10369     Entry time: Tue Aug 12 14:29:01 2014     In reply to: 10367
Author: ericq 
Type: Update 
Category: General 
Subject: Reasonable alignment restored 

I'm leaving the interferometer with the PRM aligned, so that all optics (except SRM) are near the center of their oplev range. I'm curious as to what their variance will be over the next day; this can inform whether we need to improve the ETMY oplev's angular range or not. 

 Here's an 12 hour minute-trend of all of the oplevs. The worst offenders are ITMY pitch and yaw, and ITMX pitch. 

Additionally, ETMY's yaw range is +-30urad, and here we see it wandering by 10 urad in a half day. We probably need more range.  


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