Reports until 10:38, Monday 11 March 2024
H1 ISC
sheila.dwyer@LIGO.ORG - posted 10:38, Monday 11 March 2024 (76252)
AS WFS pico'd to relieve drive to OMC suspension

Elenna, Jennie W, Sheila, Stefan, Ryan Crouch

On the weekend Stefan and company found OMC QPD offsets that increased the optical gain, and found we were close to saturating the OMC suspension 76223.  After Ryan C ran initial alignment, we went to single bounce with the AS centering and OMC ASC closed.  We stepped the OMC QPD offsets towards Stefan's values (without saturating the suspension), then introduced offsets into AS_A and AS_B pit to reduce the pitch drive to the OMC suspension.  Once the suspension drive was small, we turned off both OMC ASC and AS centering and pico'd to center the beam on the AS WFS. screenshot attached shows this process.

Images attached to this report