TITLE: 03/27 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
Wind: 7mph Gusts, 5mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.24 μm/s
QUICK SUMMARY:
No issues to report.
TITLE: 03/27 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 70Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: locked
LOG: 04:02:20UTC, a glitch seen in BS Oplev
TITLE: 03/26 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
Wind: 7mph Gusts, 5mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.23 μm/s
QUICK SUMMARY: locked 22 hours, steady range
TITLE: 03/26 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 70Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY:
LOG:
Lock is 21+hours old, everything was pretty quiet today.
TITLE: 03/26 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC STATE of H1: Observing at 64Mpc INCOMING OPERATOR: Jim SHIFT SUMMARY: Only out of observing to run a2l when LLO lost lock. LOG: 11:38 UTC LLO lost lock. Out of observing to run a2l. 11:44 UTC a2l done. Back to observing. 11:45 UTC GRB
Have remained in observing. No issues to report.
TITLE: 03/26 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 65Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
Wind: 5mph Gusts, 4mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.22 μm/s
QUICK SUMMARY:
No issues to report.
TITLE: 03/26 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY:
OMC DC SUM and DHARD Y seem to glitch at the same time
This is a classic case of "Middle-Click Syndrome". Someone highlighted that OMC DCPD line in the Verbal Terminal and then accidentally middle clicked later. I checked this by first checking the Verbal logs to make sure it wasn't in there, and then I went to the alarms work station and middle clicked in the Verbal Terminal. Sure enough, the same March 10 OMC DCPD saturation message showed up.
About an hour after coming on shift I noticed something in the CR air and put on my mask, but after a while it was clear that that didn't help, so I started looking for other things, and realized it sort of smelled like burnt plastic. Called Corey, Richard, Dave, and a couple other people. Turned off most of the CR computers (about 4 warm ones), checked the MSR, checked the Computer user's room, and the smell was only in the CR. Tried to contact Robert, waited, but then turned off his computer, and am now waiting to see if that computer was overheating, and if turning it off clears up the air.
Currently watching H1 from the Computer Users Room, and have Verbal Alarms running in here.
we were not able to pin down where the odor was coming from, and there are no odors today.
TITLE: 03/26 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
Wind: 8mph Gusts, 6mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.25 μm/s
QUICK SUMMARY:
TITLE: 03/25 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY:
LOG:
Quiet shift. Nothing to report. Amber was on site about 21:00 with a tour. Robert has been on site waiting patiently for LLO to go down.
TITLE: 03/25 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC STATE of H1: Observing at 64Mpc INCOMING OPERATOR: Jim SHIFT SUMMARY: Observing entire shift. No issues to report. LOG: 07:57 UTC GRB 13:42 UTC Changed sign of gain to damp PI mode 27
Have remained in observing. No issues to report.
TITLE: 03/25 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 61Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
Wind: 9mph Gusts, 6mph 5min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.30 μm/s
QUICK SUMMARY:
No issues to report.
TITLE: 03/25 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: one lock loss, easy relocking
LOG:
[Suresh D, Bubba G, Jason O, Rick S., Sudarshan G]
We have seen that a non-glitchy oplev laser could be pushed into a glitchy behaviour if the ambient temperature changes. Since we presently tune the lasers for single-mode (non-glitchy) operation in the PCal lab and then transport them to their respective oplev locations, we are required to retune their power in-situ to recover glitch-free behaviour. This is often a time consuming process. We therefore wished to be able to set the PCal room to the temperature of LVEA (or XVEA or YVEA as needed) so that we may be able to increase the reliability of this process and reduce the time needed to tune them in-situ.
At this time the two end-station VEAs in LHO have glitchy lasers. We therefore wish to replace these with tuned lasers at the earliest opportunity. We measured the temperature of these VEAs.
| Location | time | temperature | remarks |
|---|---|---|---|
| Y VEA | 23Mar2017 12:10PM | 66.1 degF | 15mins wait time for T to settle [SD, BG] |
| X VEA | 23Mar2017 03:18PM | 66.5 degF | 15 mins waiting time. T oscillates between 66.3 to 66.8 degF in ~5mins [SD,RS,SG] |
Bubba reset the air-conditioning control settings in the LSB labs, so that we can set the PCal lab temperature to required value.
We have prepared three lasers for glitch free operation. [SD, JO]. One of them is presently ready for installation at Y-end (tuned at 66.1 degF room temperature). See attached pics for further details.
Two others lasers are under preparation for installation at X-end and possibly BS.
Note: The same thermocouple sensor (Fluke hand-held device) was used at all locations to avoid calibration differences between various wall mounted sensors at these locations.
TITLE: 03/25 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
Wind: 19mph Gusts, 17mph 5min avg
Primary useism: 0.04 μm/s
Secondary useism: 0.32 μm/s
QUICK SUMMARY: locked in Observe
I calculated the spot centering on the IMC mirrors, with help from Kiwamu and Jax (alog #6676).
All beam spots are with 2.3mm on center on all 3 mirrors, which is slightly better than what Jax measured in June.
| Beam Centering Measurements: 12/12 | P2L/Y2L gain | smallest peak amplitude | EL/EP | alpha | alpha in % | distance from center of mirror, in mm |
| 0.25/5.2382 | (EL/EP)*P2L/Y2L gain | % * 0.375 | ||||
| MC1 | ||||||
| P | -0.90 | 0.05 | 0.048 | -0.043 | -4.3 | -1.6 |
| Y | 0.60 | 0.30 | 0.048 | 0.029 | 2.9 | 1.1 |
| MC2 | ||||||
| P | -1.30 | 0.05 | 0.048 | -0.062 | -6.2 | -2.3 |
| Y | -1.00 | 0.50 | 0.048 | -0.048 | -4.8 | -1.8 |
| MC3 | ||||||
| P | 0.85 | 0.12 | 0.048 | 0.041 | 4.1 | 1.5 |
| Y | -1.10 | 0.05 | 0.048 | -0.052 | -5.2 | -2.0 |
I'm revisiting beam centering measurements, and have recalculated the beam centering logged here, based on my enhanced knowledge, and with both the procedure used in 2013 and in 2017.
My sign conventions in this 2013 alog are incorrect, and I'm now correcting them, and posting values using both the 2013 and 2017 procedure.
In 2013, though it's not stated, I used the Eul2OSEM values that match the UR OSEM, which matches the procedure I used in 2017, alog 34973
Updated Results (details in attached pdf):
