Reports until 14:33, Thursday 16 July 2026
H1 SEI
shoshana.apple@LIGO.ORG - posted 14:33, Thursday 16 July 2026 (91073)
Restoring BRSY

After the power outage last night the ETMY BRSs thresholds were changed and the BRS was stuck in a damping loop again.

I've changed the H1:ISI-GND_BRS_ETMY_HIGHTHRESHOLD from 8000-->4000 and did the usual 'disable the damping from 20 minutes and then re-enable it' 

This might just be me not fully understanding the damping controls, but confusingly, when I re-enabled the damping, the BRS began to damp down despite the BRS remaining in the "BRS GOOD" state and the damping remaining off (shown in picture below, USER channel is whether damping is enabled or disabled, DAMPBIT is whether the damping is on or off.

This could be me not fully understanding the system, but it might explain why BRSY has had so many issues

Images attached to this report