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Entry  Tue Feb 12 00:14:00 2013, yuta, Update, Locking, PRM coil balancing 
    Reply  Sat Feb 16 17:27:26 2013, yuta, Update, SUS, PRM coil balanced PRM_f2a.png
       Reply  Sun Feb 17 19:27:19 2013, rana, Update, SUS, PRM coil balanced 
       Reply  Wed Feb 27 11:59:43 2013, yuta, Update, SUS, PRM/BS coil re-balanced PRM_f2a20130227.pngBS_f2a20130227.png
Message ID: 8096     Entry time: Sun Feb 17 19:27:19 2013     In reply to: 8093
Author: rana 
Type: Update 
Category: SUS 
Subject: PRM coil balanced 

 I will check out the AS55 situation tomorrow. Just put it on my desk.

MC Autolocker was disabled - I enabled it.

For the F2P.py, you should look at how we did this with the script written 8 years ago in csh. There we stored the initial values in a file (so they don't get blow away if someone does CTRL-C). Your python script should have a trap for SIGINT so that it dies gracefully by restoring the initial values. In order to have the smooth value adjustment, you must first set the TRAMP field for all the coil gains to 2 and then switch. Make sure that the lockin ignores the first few seconds of data after making this switch or else it will be hugely biased by this transient.

For the PRM OL use as a F2A reference, you also have to take into account that the OL beam is hitting the PRM surface at non-normal incidence. IF it is a large angle, there will be a systematic error in the setting of the F2Y values.

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