Jeff B, Sheila, Jim W by phone

I came in to do some commissioning.  Jeff B was starting to work on violin 1st harmonics while I planned to some ESD measurements so we took the IFO out of observing.  Jeff B made a modest increase in the violin damping gain the moment before the IFO unlocked and both end station ISIs and HPI's tripped.

This seems to be a coincidence, not some sort of violin mode/pump controller conspiracy.  The attached plot shows EY pump pressure goes to not OK about one second before EX pump pressure goes to not OK, which was about one second before Jeff changed the gain for ETMX MODE10 (with a 10 second ramp). I am not sure if we can trust the timing of the pump controller channels relative to the front ends.

With advice from Jim W on the phone, and using instructions from 37359 we are bringing back the pump controllers.