mark.barton@LIGO.ORG - posted 12:53, Thursday 26 June 2014 - last comment - 12:36, Tuesday 01 July 2014(12494)
QUAD08 TFs
Joe and Andres finished adjusting QUAD08 so I started a round of TFs on both chains at 12:52. Order is undamped M0, R0, then damped M0 and R0.
First set of measurement failed. Started them again at 23:52:23 UTC.
Transfer functions ran yesterday in the staging building are showing clear sources of rubbing especially in the pitch/length/yaw degrees of freedom for the reaction chain. Main chain has large unexpected cross couplings in pitch.
Andres and Jeff realized the cover was on during that measurement, which is why results were bad. We started them again Friday overnight.