Reports until 22:37, Monday 03 April 2023
H1 ISC
daniel.brown@LIGO.ORG - posted 22:37, Monday 03 April 2023 (68384)
Spot position moves this afternoon

Evan, Kevin, Elenna, Dan

We tried moving the arm spots around this afternoon by hand by adjusting the ITMX, ETMX, and ETMY A2L gains. Overall it wasn't particularly sucessful. We found some initial PRG improvements moving ETMY down towards the center. Overall we could make the low frequency frequency noise coupling worse, but never better. We also made jitter coupling worse. We have not updated any spot positions in the guardian.

The camera servos didn't not behave as expected after we moved the spots and tried to switch them back on. Despite the offset being calculated and set correctly the loop seemed to run off in yaw, so we stayed on ADS.

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