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Entry  Mon Aug 3 01:08:20 2009, Alberto, Update, PSL, MC unlocked 
    Reply  Mon Aug 3 12:57:09 2009, Alberto, Update, PSL, MC unlocked 
Message ID: 1817     Entry time: Mon Aug 3 01:08:20 2009     Reply to this: 1818
Author: Alberto 
Type: Update 
Category: PSL 
Subject: MC unlocked 

Friday afternoon the mode cleaner got unlocked. Then some adjustment of the MC1 bias sliders locked it again. The driftmon showed the excursion for pitch and yaw of MC1 becasue it wasn't updated after the change.

Tonight Rana found the MC unlocked and simply touched the sliders to bring the OSEMs back to the driftmon values.

MC1 Yaw remains different from the driftmon. If brught back to htat value, the MC would get unlocked.

More investigation is needed to understand why the MC lock hasn't been stable for the last few days.


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