shoshana.apple@LIGO.ORG - posted 10:59, Tuesday 09 June 2026 - last comment - 11:35, Wednesday 10 June 2026(90541)
ETMX BRS Stuck in damping loop
The EndX BRS was stuck in a damping loop (I'm assuming caused by the power outage). Usually when this happens increasing the damping thresholds temperately fixes the issue, so we went ahead and did that. It seems to only be effecting the ETMX BRS, so we left the ETMY one alone Jim and I increased the damping thresholds from: H1:ISI-GND_BRS_ETMX_HIGHTHRESHOLD: 2000-->4000 H1:ISI-GND_BRS_ETMX_LOWTHRESHOLD: 800-->2000 It also looks like the ETMX BRS drifted out of range (maybe due to the heater losing power and not returning to the original level?) so I've increased the voltage going to the heating plates and will check back in tomorrow to see if it's been restored
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ETMX BRS has returned to normal, I am going to increase to drift control voltage slightly (2-->3) to hopefully get it more in range (currently 1.5e4 counts) and change the thresholds back H1:ISI-GND_BRS_ETMX_HIGHTHRESHOLD: 4000-->2000 H1:ISI-GND_BRS_ETMX_LOWTHRESHOLD: 2000-->800
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