All is well. No issues or problems to report at this time. 

TITLE: 03/19 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 119Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

• Quiet Shift - nothing of any significance to report
• Initiating transition to Owl shift
• the PSL quad display was blank
  • i attempted a shutdown and restart but I don't seem to be able to locate the power switch for the nuc
  • leaving it off for te night for someone else yo have a look.
    • i'll get educated on it tomorrow

LOG:

TITLE: 03/18 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY:

re-locking from 5.2 eq off Northern CA

   Relocked this morning easily after the Utah earthquake. There have been several more large earthquakes this morning along the Ring of Fire. The IFO has ridden through these with a bit of range drop but no other apparent consequences. We are still ringing up from the last large group of quakes in Indonesia. 

   The wind is low, and microseism is high. The range is hovering around 115Mpc. 

   Today's goal is to keep it locked, and do the best we can to ride through these troubled times.        

   Add 300ml water to Crystal Chiller. Water had not been added since 02/20/20
   Added 150ml to the Diode Chiller.  Levels were OK just had extra water in cup.
   Both filter look good. The pressures and flows are normal.  

Closing FAMIS #10553

The Lock Loss Alert system medm is not updating, its last time stamp was 02:59:59 PDT this morning. I'm investigating.

TITLE: 03/18 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 119Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

• Shift was basically quiet

LOG:

3:27 SEI_ENV switched to EQ

15:27 GRB-Short E368690

• LLO contaced and confirmed alert
• IN_TRANS functioning properly

25:59 Initiating transition to Owl shift

I don't recall when I first noticed this but it wasn't lang after my shift started and as I prepare to leave the site they still are not back to nominal operation.

• the squeezer unlocked and relocked in 12 seconds - from 02:25:05- 02:25:27. There is some time overlap in the screenshots as I couldn't manage the entire event into one image.time some

Isolated EX RGA that is bolted to BSC5 empty chamber and observed the main volume pressure immediately decrease. I was monitoring PT-510; starting pressure was 1.97x10^-9 Torr and fell to 1.68x10^-9 Torr several minutes later. Then we mysteriously lost EX vacuum channels and could not read out several pressure gauges including PT-510 (see Gerardo's aLOG 55654). A trend of PT-523 on other side of CP8 is attached, along with the hot cathode wide-range PT-525 gauge on BSC5 (still waiting for PT-510 to recover). 

I connected the leak checker to RGA pump port, removed foil/tape from each conflat joint, one-by-one, while spraying He. The highest signal read from a couple of flanges was 3x10^-9 Torr-L/s of He (background 1x10^-12 Torr-L/s). Next week I'd like to revisit this to pin point the leaky joint(s). We are expecting a much bigger leak in e-7 Torr-L/s range. 

Kyle came by (while honoring social distancing) and cycled the N2 calibration bottle valve in case that was the cause of bigger leak. Next week I will valve RGA back into main volume to measure new pressure. 

RGA is OFF and valved out of main volume. Leak detector is still connected, but valved out of RGA manifold.