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Entry  Thu Jun 28 00:50:48 2012, yuta, Update, Locking, PRMI work started, commissioning plan POP_1024903948.bmpREFL_1024903929.bmpAS_1024903921.bmp
    Reply  Thu Jun 28 01:44:57 2012, Koji, Update, Locking, PRMI work started, commissioning plan 
    Reply  Thu Jun 28 15:21:02 2012, rana, Update, Locking, PRMI work started, commissioning plan 
       Reply  Thu Jun 28 20:59:28 2012, yuta, Bureaucracy, Locking, vent for PRC check, TOMORROW! 
          Reply  Thu Jun 28 22:08:57 2012, Jenne, Bureaucracy, Locking, vent for PRC check, TOMORROW! 
             Reply  Fri Jun 29 01:49:36 2012, yuta, Bureaucracy, Locking, vent for PRC check, TOMORROW! 
Message ID: 6891     Entry time: Fri Jun 29 01:49:36 2012     In reply to: 6890
Author: yuta 
Type: Bureaucracy 
Category: Locking 
Subject: vent for PRC check, TOMORROW! 

Quote:

 What do you mean by PR2, PR3 flipping?  They are (supposed to be) flat mirrors, so obviously they should be installed correctly, but they won't change the mode matching in a huge way if they're backwards, right?

We see some ghost beam spots at POP. This may come from the back of PR2 and PR3. Also, they may change mode matching because of thermal lensing, mirror deformation, and other unexpected reasons. I thought we should check every mirrors in PRC, if PRM is not flipped.

We are going to check PRM just because we spent so much time for the PRC problem, and still don't have the solution or evidence.
PRM flipping is kind of the only idea for the root of all evil -- terrible beam shape, low PR gain, unstable PRMI lock.
So, I want to check with my eye during the stay.

I don't think we have to redo magnet gluing. It's okay to leave them on HR side.

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