Reports until 14:44, Wednesday 06 March 2024
H1 ISC (OpsInfo)
jennifer.wright@LIGO.ORG - posted 14:44, Wednesday 06 March 2024 - last comment - 15:03, Wednesday 06 March 2024(76158)
Reset OMC ASC matrices and gains to those set on 4th March

As we went through SDF revert yesterday when locking all the OMC SDFs were reset. I turned off the QPD A offsets and reset the input and output ASC matrices to those we had found allowed us to lock the OMC with ASC and no saturation of the OMC suspension.

First picture is the reference picture from yesterday before the revert. I have not set back the changes to DCPD offsets as I think these were to make sure DCPD SUM output did not dip to a negative number due to dark noise.

Second picture is the OMC model SDFs now.

The guardian has been set to not go through SDF revert when we lose lock however the guardian has the ASC gains hard-coded in so we may want to replace these with the new values in the OMC guardian once we verufy these are correct by manually locking the OMC once the full IFO is locked.

Images attached to this report
Comments related to this report
jennifer.wright@LIGO.ORG - 14:53, Wednesday 06 March 2024 (76159)

I accepted these OMC model values above in SDF. Picture attached.

Images attached to this comment
ryan.short@LIGO.ORG - 15:03, Wednesday 06 March 2024 (76161)

The new POS_X and ANG_Y gain values (accepted in previous comment's screenshot) have been updated in the OMC_LOCK Guardian's ASC_QPD_ON state (where they are hard-coded in). Changes loaded and updated in svn.