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Message ID: 1533     Entry time: Wed Apr 29 15:56:43 2009
Author: rob 
Type: Update 
Category: Locking 
Subject: effect of SRCL detune on ARM powers in a CARM sweep 

With no DARM offset, sweeping CARM shows an asymmetry between the state where we lock to a DARM spring and the state with a DARM anti-spring.  This is why we have a link between the DARM and CARM optical springs. 

For each DARM detune direction (positive or negative, spring or anti-spring), there is only one CARM direction which can yield a DC-based error signal lock with a CARM offset but no DARM offset, which is what we want.

Attachment 1: CARMsweep_DARMspringnospring.png  26 kB  | Hide | Hide all
CARMsweep_DARMspringnospring.png
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