Reports until 12:13, Thursday 13 February 2025
H1 SQZ
camilla.compton@LIGO.ORG - posted 12:13, Thursday 13 February 2025 (82787)
SHG temp and alignment adjusted. Only improved from 105 to 107mW. OPO trans setpoint reduced again

Camilla, Sheila

As Sheila/Daniel did in 82057, I touched the SHG steering picos (plot) and temperature (this was annoying and not clear) but could only increase SHG power form 105 to 107mW. Our best is ~120mW. We've seen this before with LVEA temp swings.

Couldn't lock with OPO trans at 75uW (Ibrahim reduced from 80uW in 82761) so I further reduced to 70uW as in wiki and adjusted OPO temp. H1:SQZ-OPO_ISS_CONTROLMON is at 1.5V so not great but hopefully good enough especially as the LVEA temperature stabilizes.

We also increased the SQZ_ANG_SERVO gain back form 0.1 to 0.5, undo-ing part of Sheila's Feb 3rd edit.

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