stefan.ballmer@LIGO.ORG - posted 09:36, Monday 22 December 2014 - last comment - 13:31, Monday 22 December 2014(15776)
16h lock of the DRMI
broken by people starting to go into the LVEA. Start: 2014/12/22/01:05 Stop: 2014/12/22/17:25 Duration:16h20min We do see O(1%) power drifts, including a step arounbd 8:30am local - presumably due to human activity. We will chase down where this comes from.
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Kiwamu pointed out that PSL or IMC fluctuations could be the culprit in the ~1% drop in power build up over the course of 14 hours. I attached some trends that show that the PSL output is the cause of the long term degredation and the jump at ~16:01 UTC.
I also attached the WFS loops that we've closed in the past few days (BS,PR3, PRM, SR3, SRM) to see how they are reacting to the change in power and they seem to not vary much over the course of the night. I've also attached some trends of the WFS/optics that we're not using (RF45 and PR2) to see if the uncontrollled DOFs are also coupled into this power loss, it looks like there might be some of this occuring when comparing thhe WIT sensors on PR2 to the power buildup.
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