TITLE: 09/11 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

IFO is in NLN and OBSERVING (quite poorly) - We're going to OBS with low range (alog 86844)

Post outage recovery allowed us to get into NLN but as we got there, our range was sitting at a cool 103 MPc with a few culprits identified by Elenna and Sheila.

Getting to NLN was easy enough with the one issue being a shutter test guardian issue that was fixed after a few inits and another being the EY HV being off, causing a lockloss when it was turned back on (this happened at OMC_WHITENING). alog 86842. Elenna and Camilla helped me reconcile ~100 SDF diffs (alog 86843 and attached)

SQZ:

SQZ was and still is bad but we managed to improve it by running opo temp and ang adjust (manual and auto) to improve the range up to 130 MPc. Unknown why it's still not the same as before.

IMC:

The IMC was the other point of discussion but we don't really know if this is a problem. Sheila and Elenna were stepping through the IMC PZT whilst wathcing MC_REFL (which looked different). Ultimately we still don't know.

We do know that our calibration is fine so it's just high noise that is keeping us 25 MPc below our usual. This noise seems to be from everywhere according to the coherence checks (attached)

Comissining will continue tomorrow to fix whatever is causing this. On the bright side, high violins damped while we were locked.

LOG: