ryan.crouch@LIGO.ORG - posted 20:02, Wednesday 18 March 2026 (89560)
OPS Wednesday EVE shift sumary
TITLE: 03/19 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: I think the +90 phase is incorrect on RF45, and so is -90. I've been able to lock PRMI and DRMI easily this evening, but I lose it as soon as we engage DRMI_3F, more sensors to phase.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 22:53 | TCS | Sophie | Vac prep lab | N | CHETA work | 23:16 |
| 23:15 | VAC | Gerardo | Site buildings | N | Cryotrap checks around site | 00:39 |
- 23:43, & 23:47 UTC SEISMON crashed
- 00:20 UTC Erik brought SEISMON back in the capacity that he could so I could get SEI_ENV out of error, now its just mad about dead seismon channels which cleared a few minutes later
- 01:00 UTC I'm losing lock now as soon as I engage DRMI_3F, so these sensors need to be rephased (REFLAIR_B27I, REFLAIR_D135Q)
- I tried to guess, +/- 90, +/- 45. -45 was the slowest to lose lock, it had a noticable 30Hz oscillation in RF18
- After a full lockloss I tried to turn back on MICH ASC now that the alignment is good
- +/-90 phase on RF45 did not work, both exibited the same behavior. I turned it back off, the BS glitching was really not helping here
- An interesting behavior I saw a few times was that DRMI would lock as a TEM01 then the BS would have a small glitch then it would shift to TEM00
Images attached to this report
