camilla.compton@LIGO.ORG - posted 20:31, Wednesday 29 January 2020 - last comment - 20:34, Wednesday 29 January 2020(54804)
H1 back to Observing
Following on from 21:57 UTC Lockloss, as in Jim's alog 54795. We currently have microseism up at 0.80 μm/s which probably helped make this acquisition 6 hours long!
- 02:19 Initial alignment started. A few different changes were made during this acquisition by Jenne, Sheila and Keita:
- Yarm initial alignment setpoints reset to improve future initial alignments. alog 54798
- SRY locking threshold lowered to 0.3 to help initial alignment get through SRC alog 54799
- Dither convergence checker tightened to avoid locklosses at ENGAGE_SOFT_LOOPS alog 54803
- 04:10 NLN and Observing
- ALS EY SDF Diffs accepted and attached. These are from Jenne's work described in alog 54798
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Comments related to this report
During states LOW_NOISE_COIL_DRIVERS and TRANSITION_FROM_ETMX we had DIAG MAIN give this messages that AS and REFL beam diverters aren't closed. Sheila assured me that this is due to a guardian re-shuffle and isn't a problem, but maybe we could remove these warnings.