Reports until 17:25, Wednesday 14 June 2023
H1 SEI
jim.warner@LIGO.ORG - posted 17:25, Wednesday 14 June 2023 - last comment - 10:44, Thursday 15 June 2023(70464)
ETMY X sensor correction turned off because of the wind

Another pretty windy day, I've been looking at the ETMY ISI to see if any changes can be made to help staying locked. Only easy thing I've found so far is turning off the off-axis sensor correction. Watching the outputs here, it is contributing to the ISI swinging  several microns. I don't think it will change much, but don't have a lot of other things to try, at the moment, and it probably can't hurt. I've accepted the diff in the observe file, so this shouldn't affect our ability to go to observe when Corey is done relocking.

Attached trend shows the St1 X cps on the top, on the bottom 2 different points of the X sensor correction path to show when I turned it off, green is the filter output, orange is the output of the downstream match bank where I turned off the output. When the sensor correction is on the CPS is mostly dominated by it at low frequency, swiinging almost 10 microns at points. With sensor correction off, when the orange trace goes to 0 on the bottom, the cps stops moving around so much.

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Comments related to this report
camilla.compton@LIGO.ORG - 10:44, Thursday 15 June 2023 (70484)DetChar

This was turned off 06/14 23:50UTC, and will be kept off for now. Tagging DetChar.