TITLE: 08/23 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

IFO is in ACQUIRE PRMI and MAINTENANCE

There have been 2 initial alignments (fully auto), many locklosses due to ASC reasons and many more due to wind gust speeds (to the best of our knowledge). We were in NLN for a total of 46 minutes today! Additionally, the LVEA has been swept in prep for observing (alog 79666). The comissioners are gathering a weekend operator task list.

We've had a rough day trying to get locked due to the following reasons:

PI Mode Mania (alog 79665)

PI modes since we have been back are getting rung up right after we enter NLN. While usually the culp[rit is mode 24, mode 31 does sound on verbal too. Camilla and Naoki tried to ring them up to investigate and they were not able to ring up mode 24, implying a potential slight change in the PI modes. We could not get locked to investigate thgis further but we tyhink thart this might be related to the short <1hr 30 mins locks that we are getting.

Wind Speed Story:

Wind gusts have been over 30mph for the last few hours and this has made getting locked extremely difficult with easily over 10 failed lock attempts from ALS (usually Y) to DRMI. While this is annoying, it is also a known impedance.

OMC Trans Camera Conundrum:

The OMC Trans Camera is observed to shake/flicker at an unknown state (we saw it once today and a few times yesterday)/ By the time we were ready to investigate when this flicker occurs, we started having our locking issues. We did rule out camera auto-exposure problems.

Pop 18 Peculiarity (alog 79663) :

Pop 18 is particularly low and we have been moving PRM and SRM in order to maintain DRMI until we can offload. A potential plan is to go fix it in the LVEA (ISCT1) but since we were unable to investgiate while locked, this is going to be delayed to another day given that the issue still persists.

What we want to do once locked:

• Calibration sweeps right as we reach NLN, 1 hour after (mostly thermalized) and if possible
• LSC Feed Forward Tuning
• PI Solution
• Wrangle SDFs

LOG: