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Entry  Tue Mar 11 18:34:11 2014, Jenne, Update, LSC, Composite Error Signal for ARms (7) spectra-ungarble.pdfScreenshot-1.pngScanFromOffToOnResonance.pdfScanThroughResonance.pdf
    Reply  Tue Mar 11 19:38:26 2014, manasa, Update, Green Locking, ALS Slow servo settings 
       Reply  Fri Mar 14 10:31:10 2014, jamie, Update, Green Locking, ALS Slow servo settings 
Message ID: 9721     Entry time: Tue Mar 11 19:38:26 2014     In reply to: 9719     Reply to this: 9727
Author: manasa 
Type: Update 
Category: Green Locking 
Subject: ALS Slow servo settings 

Quote:

Nic, Jenne, EricQ, and Koji should describe the demonstartion of CESAR achieved tonight.

Q and I have started to use the ALS slow servo for the end aux lasers while locking the arms using ALS. The servo prevents us from hitting the limits of the PZT range for the end lasers and a better PDH locking.

But keeping the servo ON causes the slow output to drift away making it hard to find the beat note everytime the arm loses lock. The extensive beat note search following the unlock can be avoided by clearing history of the slow servo.

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