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Reports until 16:04, Tuesday 05 March 2024
H1 SQZ
naoki.aritomi@LIGO.ORG - posted 16:04, Tuesday 05 March 2024 (76132)
PMC realignment

Naoki, Nutsinee, Daniel

While scanning PMC, we noticed a large higher order mode. We went to SQZT0 and found that it was due to yaw misalignment. After we aligned PMC, we measured PMC input and transmission power. The PMC input power is 820mW and the transmission power is 680mW so the PMC transmissivity is 83%, which is much higher than before. We calibrated the SQZ-LASER_IR_DC_POWERMON and the SQZ-PMC_TRANS_DC_POWERMON to 820mW and 680mW, respectively. After we locked SHG, the SHG GR power reached 100mW.

We also put some beam dumps in SQZT0.

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