Reports until 14:15, Friday 29 September 2023
H1 SQZ (SUS)
naoki.aritomi@LIGO.ORG - posted 14:15, Friday 29 September 2023 - last comment - 09:10, Monday 02 October 2023(73171)
ZM6 offload

As reported in alog73105, the ZM6 looks more saturated recently so I offloaded the ZM6 by moving ZM4. The ZM5 and ZM6 follow the movement of ZM4 by SQZ ASC. The first attached figure shows that the ZM6 LL/UR output reduced from 32000 to 21000 by ZM4 change. The second/third attached figures show the saturation of ZMs before/after this offload. You can see that the ZM6 LL/UR output reduced from red to orange region, while the ZM4 output increased from green to orange region. I have not seen the obvious SQZ BLRMS change by this offload.

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camilla.compton@LIGO.ORG - 09:10, Monday 02 October 2023 (73212)

As expected there was no noticeable change in SQZ BLRMs before / after this ZM offloading (offloading at time of crosshair).

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