TITLE: 04/24 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
SHIFT SUMMARY:

Locks:

• Lockloss at 20:22 UTC due to a 7.1 magnitude Indonesia earthquake (10hr 15 min lock).

  • Put IFO in DOWN while the earthquake rings down

  • IFO went into SEI_CONF EARTHQUAKE mode for ~15s before losing lock

  • Achieved NLN after shift - started locking as shift ended.

Manual Touching:

• SQZ was touched up at 16:17 UTC →16:45 UTC

  • Done due to live squeezing looking worse than the 4/20 reference - Camilla realized this and took a new reference.

  • Changing the SQZ phase, I started at 164.03 Deg and ended at 135.59 Deg

    • Resulted in FDS lower than the last 4/20 reference as well as Camilla’s reference - both as seen on the FDS FOM.

• Turned off sensor correction at 20:44 UTC by changing SEI_ENV to maintenance. This put SEI_CONF from EARTHQUAKE to SC_OFF. This was done due to the Earthquake. 

  • SEI_ENV and SEI_CONF returned to EARTHQUAKE Mode with sensor correction on. This happened at 21:51 UTC.

  • Turning back to SEI_ENV is CALM (SEI_CONF is WINDY) at 22:43 UTC

• Turned on ALS Polarizer through ALS Guardian (to fix some polarization ring-ups) at 21:23 UTC.

• SUS_RM1 and SUS_RM2 turned to SAFE at 22:02 UTC.

  • SUS_RM1 and SUS_RM2 returned to ALIGNED at 22:35 UTC.

  • Done due to a power supply switch.

Automatic Early Morning Lock:

This morning’s running 5-hour lock was automatic. There seem to have been three NLN attempts during Sunday night, two of which were successful!

• Attempt 1: Started trying at about 5:07 UTC (22:07 PDT) and eventually achieved NLN at around 6:00 UTC (23:00 PDT) before losing lock 1 hour and 48 minutes later at 07:45 UTC (00:45 PDT). Relocking was attempted immediately after lockloss.

• Attempt 2: Reached and stayed CAMR_TO_TR at 8:31 UTC (1:31PDT) for ~9 minutes before losing lock at 8:40 UTC (1:40 PDT). Relocking was attempted immediately after lockloss.

• Attempt 3: Reached NLN at around 10:06 UTC (3:06 PDT), which was the state I found it in.

Other:

- Dust monitor investigation at 16:55UTC - 

• The Optics Lab dust monitor went up to a count of ~708 at 12:58UTC →  13:08UTC
• Same DM went up to a count of 2454  at 13:53 UTC → 14:03 UTC
• Another local peak of 539 cts at 14:14UTC →14:24UTC

- The locked period of the day had a couple of state changes between Cal Meas and NLN for measurement taking.

• Cal Meas at 18:27 UTC

  • Back to NLN at 19:02 UTC

• Cal Meas at 19:52 UTC

  • Back to NLN at 20:11 UTC

- At 19:33 UTC - Monthly Hanford Site scheduled test alert successful (and at the right, right phone)

LOG: