nutsinee.kijbunchoo@LIGO.ORG - posted 16:35, Monday 24 April 2017 (35759)
Damping for 4.7kHz violin mode turned off
Sheila, Nutsinee
We commented out a line in the guardian that turn the damping gain on for this mode (H1:SUS-ETMY_L2_DAMP_MODE10_GAIN) to see if the line become more or less of a problem when it's not actively damped. We also unmonitored the gain channel.
Ops: If the line rings up during your shift, add the gain of 0.02 back and attempt to damp the line as usual. Adding the gain back won't kick you out of Observe but changing the phase will.