robert.schofield@LIGO.ORG - posted 19:01, Tuesday 14 July 2015 (19644)
PSL periscope safety cover damped
Cheryl and I installed damping on the saftey cover (see photo) which was responsible for the 300 Hz peak in DARM. I also tuned the resonance of the top mirror to take advantage of the lower level at 300 Hz. Details after we relock.
Images attached to this report
