ALL TIMES IN UTC

• 22:01 Kiwamu out to LVEA to measure ALS Diff PLL electronics next to the PSL enclosure.

• 22:03 Gabriele has taken the mode cleaner for measurements.

• 22:35 Kiwamu out of LVEA

• 23:33 Sigg, Stefan and Robert out to the PSL to connect a cable for RIN strain measurements WP#5434. Robert will be monitoring the environmental entry procedure from outside the enclosure.

• 23:45 Kiwamu back out to the floor to measure next to the PSL again

• 01:00 Sigg, Stefan and Robert back from PSL. temps monitored by me in dataviewer. Temp dropped by a few degrees as expected 73F to 69F. Everything remains normal.

• 01:40  we’ll try locking now. Winds around 35mph

• 02:15 TCAC members start arriving for tonight’s outreach event

• 03:39 IFO fully locked at NOMINAL_LOW_NOISE

• 03:40 Lockloss. Will attempt relock at DC_READOUT

• Dale called to inform me that the Star Party is over and that some late comers may show up.

Summary:

• The beginning of the night was slow with high winds. IFO hadn’t been locked all day because of the high winds.After a couple of hours I began locking and had to contend with a troublesome Y-Arm.

• Input_Align gave me trouble so Sheila and I tried increasing gains and decreasing trigger times to no avail. So we moved on with the other alignments.

• The IFO came into full Nominal_Low_Noise lock for a few minutes. Lockloss most likely due to poor initial alignment done while the wind was still about 30mph.

• We re-did Initial Alignment.

• subsequent attempts to lock resulted in loss, mostly at Engage_ASC. Sheila edited guardian in a way that I believe breaks up the engaging of the ASC loops into different times rather than all at once.

• Shift ends in about 30 minutes. IFO locked at Nominal_Low_Noise/22.1W for about 45 minutes now @ 60mpc. Wind has calmed to about 20mph.