TITLE: 07/03 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
SHIFT SUMMARY:

• Violin ringups causing trouble again
• Issues with the BS/ Aligning mich fringes
• Locked and Observing for 2:23 as of 07:00UTC

Lock#1:

Lockloss at 23:06

Lock#2:

During DRMI_1F ISC_LOCK went into error again, from the same bit of code, so I again reloaded the guardian and it was fine. Guardian went to check_mich next but lost lock during it.

Lock#3-4:

Couldn't get DRMI or PRMI again, went to check _mich again where guardian complained about the BS alignment, tried twice and it lost lock during the 2nd attempt. I'm decided to do an initial alignment, which went well until I couldn't get Mich_bright to align, the spot look fine and had good symmetrical flashes. I cut my loses and went back into regular locking after some tapping of the BS to try and maximize the ASC_AS_A_DC_NSUM_OUT signal, the flashes looked much better now and PRMI was able to lock but DRMI was still having trouble. During the second attempt at DRMI I tapped on the BS a little bit in Pitch and it was able to lock (finally). Once we got to OMC_WHITENING I had to damp violins for an hour, once we got to NLN and I went into Observing, we lost lock 34 seconds later with a DCPD saturation at 01:58.

Lock#4-5:

• Lost lock at LOCKING_ALS
• No issues this time, straight through ALS, IR, DRMI. Held up at whitening again, this time after the threshold was reached I set a timer for 30 minutes then I was able to bring us back to NLN and Observing at 04:37 UTC.
• A few minutes before Vicky noticed the SQZer was complaining about AS2 so I did a graceful clear history from the SQZ_ASC_IFO screen at her direction and it fixed the issue. Possible related to alog 70890

LOG:

No log for this shift