ALL TIMES IN UTC

Arrived to find IFO beginning lock sequence after TJ did some PRMI alignment to help DRMI. It seems previous lock segments were on the average of about half a hour

• 23:09 DRMI locked.

• 23:10 Robert in the LVEA

• 23:15 Guardian hung on an OMC error. (no light on QPD)

• 23:37 noticed HEPI L4 WD SATURATION MONITOR for ITMX is at 43820cts. WD limit is set to 30000(safe)(max is 122880). WIll reset at next opportunity.

• 23:29 Dick and Wayne in the optics lab

• 23:30 Robert out of the LVEA

• 23:48 reset ITMX HEPI WD accumulator.

• 00:10 DRMI taking in excess of 16 minutes. No environmental noise observed. Tried PRMI lost lock. restored slider values back 1 hour. Re-Aligned SRM DRMI locked 1 minute later.

• 00:29 Wayne out of optics lab.

• 01:02 Stefan out to CER

• 01:16 Dick out

• -1:20 Guardian ISC_LOCK in Error at Engage ASC Part 2. Stefan cleared error

LOCK LOG:

• 23:23 Locked at NLN

  • 23:47 Lockloss at ENGAGE_ISS_SECOND_LOOP

    • DRMI ~ 13 minutes to lock

• 23:49 Began sequence

  • DRMI taking over 16 minutes.

  • 00:20 PRMI align

• 00:48 Locked at NOMINAL_LOW_NOISE

  • 0:48 Lockloss . Gabriele trying to fine tune OMC

• 00:49 Began Sequence

  • 01:07 Lockloss @ ENGAGE_ASC_PART3

• 01:08 Began Sequence

• 01:29 Locked at NOMINAL_LOW_NOISE

• 00:00 IFO still locked. 70mpc

Evening Summary:

• IFO locking in half hour segments. DRMI was taking a rather long time locking. Visiting PRMI may have improved it slightly.

• Stefan and Evan have been taking measurements and tuning for the last 5.5 hour lock.

• IFO still locked at shift change @ ~70-72mpc.