Reports until 09:28, Monday 19 May 2025
H1 PSL
ryan.short@LIGO.ORG - posted 09:28, Monday 19 May 2025 (84451)
PSL 10-Day Trends

FAMIS 31086

The PMC was left unlocked over the weekend, and when Oli relocked it this morning, it came back with higher transmitted power but about the same reflected, and the ISS diffracted power is lower too. As things are still settling, PMC TRANS is coming down and the ISS diffraction is coming up. However, this has also made the (already poorly calibrated) rotation stage downstream unhappy as the higher power out of the PMC is causing the stage to not exactly provide the power requested (e.g 2.2W vs 2.0W) and the LASER_PWR Guardian is reporting "Power not the same as requested." As the HAM1 team is currently using the beam for alignment checks and doesn't particularly care about the extra 200mW, I'll leave things alone for now.

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