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Entry  Thu Sep 22 13:56:56 2011, kiwamu, Update, ASC, C1ASS : status update 
    Reply  Thu Sep 22 17:48:20 2011, kiwamu, Update, SUS, bad oplev on ETMY OLETMY.png
       Reply  Thu Sep 22 20:12:54 2011, kiwamu, Update, SUS, ETMY oplev whitening engaged OLETMY_WF.png
    Reply  Mon Sep 26 12:41:27 2011, kiwamu, Update, ASC, C1ASS : status update 
       Reply  Fri Sep 30 01:18:39 2011, kiwamu, Update, ASC, C1ASS : status update 
Message ID: 5543     Entry time: Mon Sep 26 12:41:27 2011     In reply to: 5518     Reply to this: 5578
Author: kiwamu 
Type: Update 
Category: ASC 
Subject: C1ASS : status update 

Quote from #5518
(to do)
 + optimization of the ETMY oplevs and OSEM damping.
 + evaluation of the performance of the C1ASS with a good damping.

The servo for aligning the Y arm is working fine with the coarse gain coefficients.

However then I found the ASS_Xarm servo was not healthy.

So the next step is to refine the X arm servo in C1ASS.

 

(some notes)

  + With the ETMY oplev the Y arm became quieter after we recovered the oplev whitening filter (#5523)

  + The Y arm alignment scripts can be run from the usual C1IFO_CONFIGURE screen.

   It will servo the spot positions on ITMY and ETMY, and align the input beam pointing. It brings the Y arm power to about 1.

 + The X arm servo is doing something funny. It doesn't bring the arm power up to 1.

   I thought the X arm didn't need any modifications because the X arm servo doesn't include PZT1 and PZT2.

   So it maybe a simple bug (for example, some switches are disable and so on)

 

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