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Reports until 14:59, Tuesday 27 February 2024
H1 SQZ (SQZ)
nutsinee.kijbunchoo@LIGO.ORG - posted 14:59, Tuesday 27 February 2024 (76006)
FCGS path in SQZT0 is in good health

Dhruva Swadha Nutsinee

We have ~9 mW pickoff from the pump path into FCGS path. ~5 mW of the 1st order beam transmits through the first AOM (GAOM2). 4.4 mW of the 1st order passes through the second (GAOM3), 4.35 mW measured after EOM3. We only touched the alignment using the steering mirrors and the waveplates. Dhruv suggested FC_REFL_LF_OUTPUT*1000 should be higher than 200 counts. We had about 300 counts when we closed out. There were already irises on the table to help pick out the first order and all the beam went through. We measured ~0.4 mW hitting FCGS REFL on SQZT7. We also recalibrated the FCGS REFL diode (responsivity was 0.3 A/W, now 0.22 A/W).

 

I think we're done with SQZT0 *finger cross*

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Displaying report 1-1 of 1.