TITLE: 05/17 Owl Shift 07:00 – 15:00 (00:00-08:00), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Corey

SHIFT SUMMARY: Began the shift locked (thanks to Georgia’s ADS rephasing), but started experiencing issues about two hours in. We were taken out of Observing several times by the SQZ laser locking and unlocking. Rather than mess with the SQZ system, I un-monitored the relevant channels and we were able to keep 110 Mpc lock. I also had to re-phase PIT3 on the ADS overview from 90 to 110 to suppress ASC yaw oscillations. After those changes, things quieted down. We’ve been locked for 9 hours, Observing for 4 hours.

LOG:

07:00 (00:00) Start of shift

08:44 (01:44) Something took us out of Observing, but it was immediately ready to go back in

09:14 (02:14) DIAG_SDF showing ‘sysecatc1plc4: 2’ every few minutes, taking us out of Observing. Putting IFO into AUTOMATIC OPERATION so that it’s back to Observing faster.

09:26 (02:26) Going out of Observing, re-phasing ADS PIT3 to try and suppress oscillations

09:59 (02:59) Un-monitoring three sdf channels (will post alog), bringing us back to Observing

10:21 (03:21) Out of Observing, taking SQZ GUARDIAN to DOWN to check if we’re losing range from the SHG railing.

10:37 (03:27) Back to Observing, with squeezing

15:00 (08:00) End of shift