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Entry  Tue Oct 20 15:51:44 2015, ericq, Update, SUS, MC2 F2P tuned 
    Reply  Fri Oct 23 21:58:10 2015, rana, Update, SUS, MC2 F2P mis-tuned 
       Reply  Tue Oct 27 03:46:26 2015, ericq, Update, SUS, MC2 F2P mis-tuned 
Message ID: 11711     Entry time: Fri Oct 23 21:58:10 2015     In reply to: 11702     Reply to this: 11716  
Author: rana 
Type: Update 
Category: SUS 
Subject: MC2 F2P mis-tuned 

The OSEMs cannot be used for coil balancing above ~10 Hz. The main coupling path from OSEM drive to sensor is not through the mirror motion, but instead direct electrical coupling of the drive wires to the sensing wires.sad

I put this in the elog every ~1-2 years since people keep trying it, but it keeps coming back like a zombie.crying

Better to use the MC angular sensors for L2A decoupling. Not perfect, but better than OSEMs. For the TMs we can use the OLs.

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