TITLE: 09/10 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

IFO is in PREVENTATIVE_MAINTENANCE as of 23:06 UTC

Post-Tues Maintenance

We’re trying to get to observing but waiting on SQZ Team to finish alignment. We've reached NLN twice now.

Locking started at 19:58 UTC where after our SR3 move, we went into initial alignment in prep for full IFO locking. Initial alignment finished at 20:37 UTC. It took a while because we had to move SRM to alignment with the new SRM and SR2 positions.

We fully automatically got to NLN at 21:18 UTC but lost lock 22 minutes later (21:41 UTC) for unknown reasons. We didn’t get to observing due to SQZ commissioning work happening at that time.

Following the lockloss, we were not able to lock X-Arm ALS, losing lock twice unexpectedly, prompting yet another initial alignment. This initial alignment stalled at SRC align, which was unexpected considering we just moved SRM to proper alignment manually at this state. Ryan C paused the state and apparently that was all that was needed in order for initial alignment to re-catch, finishing the process. Onto real locking.

We lost lock unexpectedly at CHECK_IR but in relocking, were able to lock DRMI without going through PRMI or MICH. We then fully automatically got to NLN for a second time. SDF Diffs from first NLN acquisition attached.

UPDATE 16:21 UTC:

We lost lock again from NLN during SQZ alignment, convincing me that perhaps the previous LL was also SQZ related. 14 min lock. On the bright side, it seems we are reliably locking to NLN following the SR3 movement.

Other:

• H1Digivideo3 cameras (EX, EY, OMC Trans, SQZ) were temporarily down (cable was knocked out accidentally but replugged shortly after notifying CDS).
• SQUEEZE_OUT was railing during intial alignment of SRC, something I had not seen before.

Planned + Completed Tuesday Maint Activities (All times UTC)

• Align SQZ Pump AOM - WP12077 - Completed Monday 09/09
• Alternate lea/lag chiller units at LVEA, mid stations and end stations - WP12073 - Done 09/10 before shift
• PEM Magnetic Injections and SUS In-Lock Charge Measurements run successfully - 14:30 to 15:00:
• CDS Switch to Backup Router - now being tested during maintenance, WP 12069 - 15:00 - 15:05
• FARO IAS Survey Activities - WP11757 - 15:20 - 18:50
• HAM6 New RGA to CR RGA Computer - WP12074 - 15:32 - 16:25
• EY ADC PEM IO Chassis Install - WP 12067 - 15:20 - 17:40 (partially complete - done for now)
• SQZ to OMC Scans and Mode Matching - 15:25 - 18:35
• EX New DAC Transition from read only to read and write - WP12079 - 16:22 - 18:55
• Dave DAC Restart (incl. Node load + nds1 restart) following EX DAC work (and also doing more opportunistic CDS edits - WP 12075, WP 12076) - 19:00 to 19:10
• Planned SR3 IFO Alignment Move - 19:20 to 20:20
• Visual iunspection on picomotor chassis K&L to update spare channels list - WP12078 - not completed due to other EX DAC work going over-time

Other/Opportunistic (All times in UTC):

• Center IMC WFs - 18:35 to 18:45
• Routine 3IFO Checks - 16:45 - 18:10
• TCS Line Inspection - 16:15 - 16:50
• LVEA Walkabout Chamber Sweep - 16:35 - 17:25
• HAM1/2 Cleanroom Check - 17:30 - 18:30
• Battery Maintenance - 17:55 - 20:20
• LVEA Capturing Photos - 18:00 - 18:20
• Forklift Recycling Transport - 15:30 - 18:45
• Access and Camera Restart - 22:25 - 22:45

LOG: