Reports until 01:38, Sunday 09 June 2024
H1 General (Lockloss)
anthony.sanchez@LIGO.ORG - posted 01:38, Sunday 09 June 2024 - last comment - 09:30, Sunday 09 June 2024(78323)
Saturday Ops Eve Shift End

TITLE: 06/09 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Commissioning
SHIFT SUMMARY:

Ten 10Watt locks tonight with no obvious spikes in pressure .
2024-06-08_22:58:05  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-08_23:53:25  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_00:40:40  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_01:22:46  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_02:42:00  ISC_LOCK  POWER_10W -> LOCKLOSS

The above locklosses at 10Watts can be seen at alog 78320
Had to do an initial alignment inbetween the the first and last 5, that struggled to get past SRC, but I lowered the threshholds again.

2024-06-09_05:23:19  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_05:58:34  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_06:26:14  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_06:53:46  ISC_LOCK  POWER_10W -> LOCKLOSS
2024-06-09_07:21:12  ISC_LOCK  POWER_10W -> LOCKLOSS
On the last one I forgot to return H1:IMC-REFL_SERVO_IN1POL back to positive, and spent some time wondering why the IMC wasn't locking any longer lol. 


LOG:

Start Time System Name Location Lazer_Haz Task Time End
21:03 SAF HAZARD LVEA YES LVEA is Laser HAZARD 23:31
00:23 Tour Mike & IMAX LVEA Xarm YES Giving Film Crew an IMAX tour & drone flying 4:38
01:32 Fire Watch Dripta LVEA Roof & EY No Looking for fire or smoke near Rt.240 round about 02:02
Images attached to this report
Comments related to this report
keita.kawabe@LIGO.ORG - 09:30, Sunday 09 June 2024 (78327)

We had 10 locklosses from 10W lock yesterday, and we see zero pressure spike. At this point I'd say this HAM6 alignment is safe. We can try locking OMC and going to high power.

The 1st attachment is the summary trends from yesterday, the same thing as Tony posted but just in a single plot. Y-axis scale is the same as the 2nd attachment, which is from Thursday when we got pressure spikes. Note that the first spike was from a 10-W lock loss on Thursday and that was clearly visible in all pirani gauges on the plot.

 

Images attached to this comment