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Entry  Wed Feb 22 13:28:22 2012, kiwamu, Update, LSC, Y arm + central part locking 
    Reply  Wed Feb 22 19:45:33 2012, kiwamu, Update, LSC, how much length offset do we need ? armresonance.png
Message ID: 6304     Entry time: Wed Feb 22 13:28:22 2012     Reply to this: 6306
Author: kiwamu 
Type: Update 
Category: LSC 
Subject: Y arm + central part locking 

Last night I tried the "Y arm + central part" locking again. Three different configuration were investigated :

  •  Y arm + DRMI
  •  Y arm + PRMI
  •  Y arm + MICH

In all the configurations I displaced the Y arm by 20 nm from the resonance.

As for the DRMI and PRMI configurations I wasn't able to acquire the locks.

As for the MICH configuration, the MICH could be locked with AS55. But after bringing the Y arm to the resonance point the lock of MICH was destroyed.

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