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Reports until 20:29, Tuesday 31 October 2023
H1 ISC
oli.patane@LIGO.ORG - posted 20:29, Tuesday 31 October 2023 - last comment - 20:37, Tuesday 31 October 2023(73887)
Ops EVE Midshift Update

I am still working on getting the IMC to lock following today's power supply replacement (73871). Based on Jenne's instructions, I tried to get the IMC-WFS_{A,B}_{PIT,YAW}_OUT16 values back to their values from around 10/31 15:11UTC, which was before the restart and when the IMC was offline, by adjusting the offset on the IMC PZT and MC1, and was able to get much closer, but not great.

I then took IMC_LOCK to ACQUIRE and tried adjusting MC2 and MC3 for the best output, but wasn't able to get the beam to look better (or worse), so with Keita's help I lowered the IMC WFS trigger threshold in an attempt to use the WFS to better the alignment. It has worked a bit (we went from locking on the 00 mode at 30counts on IMC-IMC_TRIGGER_INMON to locking at 62 counts).

Comments related to this report
oli.patane@LIGO.ORG - 20:37, Tuesday 31 October 2023 (73888)

As soon as this is posted the IMC catches and lockes, although the amount of light on MC Trans and Refl are not correct yet.

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