john.worden@LIGO.ORG - posted 12:17, Monday 15 August 2016 - last comment - 14:38, Monday 15 August 2016(29103)
Pressure bump at YEND correlated with ISI activity
Kyle reported on Aug 12 that he thought there was a correlation between his RGA signal and locking attempts.
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=29079
On July 19 there was a programming change to the FPGAs;
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=28535
During this process there was a pressure burst in PT410 at the YEND. Dave believes that as the system was brought back, dacs railed while connected to the ISI. This caused all actuators in the chamber to go to their maximum output. We believe this caused some heating which resulted in the pressure bump.
Perhaps Kyle saw pressure changes related to ISI activity?
Images attached to this report
Comments related to this report
ISI spike on the 12th - don't think the time matches though.
Images attached to this comment
