ryan.crouch@LIGO.ORG - posted 11:28, Wednesday 30 July 2025 - last comment - 12:36, Wednesday 30 July 2025(86104)
OPS Wednesday DAY midshift update
STATE of H1: Observing at 145Mpc
We've been locked for 4:21.
- 18:10 - 18:22 UTC We dropped observing as the SQZ FC lost lock, I decided to run the SCAN_OPOTEMP state during this. SQZing doesn't look all that much different afterwords, the BLRMs look about the same.
- A full 24 hours of earthquakes.
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After Ryan adjusted the OPO temperature, there seemed to be a ~30minute to 1 hour time constant for the SQZ_ANG_ADJUST servo to bring the squeezing angle to the best for optimum squeezing, see attached. After this time, the range debatably improved. Although some of the improvement could be attributed to less earthquake ground movement. This time constant is slow but seems to be generally working well as the servo has not ran away since being implemented in 85820.
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