Reports until 11:58, Wednesday 24 April 2024
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jennifer.wright@LIGO.ORG - posted 11:58, Wednesday 24 April 2024 - last comment - 12:11, Thursday 25 April 2024(77385)
CAM PIT2 and YAW3 offsets not in guardian

Sheila, Jennie W

 

Sheila noticed our range was really high in the lock at 14:51 UTC on the 17th April.

All camera offsets are the same from the good range time (16:19:53 UTC) on the 17th (left cursor) compared to a lock from last night at 2024/04/24 13:20:30 UTC (right cursor).

The offsets for these currently (second cursor) are not in lsc_params and since we had better build-ups on the 17th (first cursor), we should fix these offsets and see if we can optimise A2L gains again in the next commissioning window after the IFO range is recovered.

The best build-ups were immediately after this good time when we changed the PIT2 and YAW3 but this made the range worse.

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jennifer.wright@LIGO.ORG - 12:11, Thursday 25 April 2024 (77414)

We looked at this again today and realised the camera offsets had been set back to their former values from before our changes to PIT2 and YAW3 on April 17th when the cameras servo guardian went through state 405 (TURN ON CAMERA FIXED OFFSETS). Then we realised we may have forgotten to reload the camer servo guradian when we made these changes so we took reloaded it then took it to DITHER ON state, then to CAMERA SERVO ON and now we have CAM PIT2 OFFSET = -173 and CAM YAW3 OFFSET = -349.5 as is set in lsc_params.

 

FIXED ISSUE