nutsinee.kijbunchoo@LIGO.ORG - posted 16:28, Thursday 07 March 2024 - last comment - 18:35, Thursday 07 March 2024(76197)
HD Fringe Visibility Improved
Trent, Vicky, Nutsinee
As part of the 8dB HD squeezing recovery effort we went and tweaked the HD visibility on SQZT7. We now have 99.15% fringe visibility on PDA and 98.17% on PDB. Green power coming out of the SHG dropped so SHG ISS was railing. I've increased the amount of green availible to the pump fiber coupler. More squeezing plots to follow.
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Vicky and I accepted FC1 and ZM1 alignment SDFs, Vicky found that the OPO and CLF ISS loops are not good, we might need to adjust gains/boosts.
I reduced opo_grTrans_setpoint_uW to 78uW in sqzparams.py to give us 20.4 SHG Launch, NLG = 17.1 (Amp/Unamp =0.377/0.022). Following "how to NLG" 73801 instructions.
Leaving SQZ in DOWN, SQZ_MANAGER in NO_SQUEEZING, FC_MISALIGNED