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Entry  Tue Jan 29 19:50:49 2013, Jenne, Update, Locking, Better POP layout, no extra PRM motion with locked cavity HalfPRCL_PRM-flatMirror_RefsAreLocked_OthersUnlocked.pdfHalfPRCL_PRM-flatMirror_RefsAreLocked_OthersUnlocked.png
    Reply  Tue Jan 29 21:07:48 2013, Jenne, Update, Locking, PRM coils need diagonalizing 
       Reply  Wed Jan 30 19:34:17 2013, Jenne, Update, Locking, PRM coils need diagonalizing 
    Reply  Wed Jan 30 19:30:21 2013, Jenne, Update, Locking, POP in-vac improved HalfPRCL_PRM-flatMirror_POPtrans_30Jan2013.jpg
Message ID: 7959     Entry time: Tue Jan 29 21:07:48 2013     In reply to: 7957     Reply to this: 7969
Author: Jenne 
Type: Update 
Category: Locking 
Subject: PRM coils need diagonalizing 

 

 [Jenne, Jamie]

We tried actuating on PRM so that we go through fringes in a known, linear way.  We used C1:SUS-PRM_LSC_EXC and awggui.  It seems that we get a lot of angular motion when we actuate....we need to look into this tomorrow.

EDIT/UPDATE:  Last night we tried several combinations of frequency and amplitude, but just for an idea,  we were using 2Hz, 1000cts.  Using Kiwamu's calibration in elog 5583 for the PRM actuator of 2e-8/f^2 m/cts, this means that we were pushing ~5nm.  But when we pushed much harder (larger amplitude) than that, we saw angular fringing. 

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