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AdV-COM (AdV commissioning (1st part) )
swinkels - 16:49 Tuesday 23 October 2018 (43241) Print this report
Comment to Drops in Hrec range (43238)
Attached figure shows that one of the 4 drum modes gets excited at the moment of the glitch, so this is likely something on the payloads as seen during O2. According to Yuta's identification, this should be the WI mirror.

Note that the old entry is from the time when we still had steel wires, and one explanation at the time was a wire slipping over the stand-off prisms, which should not happen for the monolithic suspensions. I do not see any obvious excitation of the violin modes.
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