oli.patane@LIGO.ORG - posted 08:03, Tuesday 12 August 2025 - last comment - 09:49, Tuesday 12 August 2025(86313)
Lockloss
Lockloss at 2025-08-12 14:57UTC right before the start of maintenance. Haven't looked yet to see if it was caused by the SUS charge meaurements or by something else
Oli, Camilla
This lockloss occurs while the excitation on ETMX ESD was ramping up but doesn't look related to this. It looks like am ETM_GLITCH type lockloss.
Interestingly, at this time our DARM to L3 control has been moved from ETMX to ITMX and you can clearly see the glitch in ITMX_L3, see attached. As Sheila has been telling us al along, this is a clear indicator that the issue has nothing to do with the ETMX SUS glitching and is caused by DARM with the SUS just being the witness.