State of H1: NLN, running al2

Outgoing Ops: TJ

Activities:

• a lock that broke in Increase Power
• small tweak to alignment of PR3 and PRM
• damped bounce and violins in DC Readout
• went from Noise Tunings to NLN manually
• running a2l since noise in DARM is higher at 20Hz...
• however, useism is steadily marching upwardand all stations are about 0.5um/s
• 10:05UTC, a2l done
• 10:06UTC, range is 74Mpc, went to Observe
• 10:10UTC, noticed ASAIR and REFL beam diverters were not closed, out of Observe
• closed ASAIR and REFL beam diverters
• 10:11UTC, back in Observe

TITLE: 11/28 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY: After the earthquake the useism and wind have picked up a bit, I just made it to Coil Drivers before losing it. Wind may be trending down so there is hope.
LOG:

• 00:24 Brief CP4 Major alarm. Lasted only about 30sec before it seemed to have fixed itself.
• 01:28 Robert to LVEA to start some injections.
• 01:35 Lockloss. ~40mph gusts at the CS around that time. Robert said he could hear it in the LVEA. The attached shot looks like other times I have seen wind take us out so I'm going to say that was the cause.
• 02:26 NLN, took a few tries but the wind seems a bit calmer now. About to run a2l.
• 02:42 Robert back into the LVEA
• 04:38 Lockloss. Earthquake that isn't on USGS yet. (4.8 Off  the coast of Oregon)
• 07:26 Brief CP4 alarm again.

I've scheduled 5 more burst injections. They're spaced 70 minutes apart. The first one begins at 8:10 UTC (12:10 PT). Here are the updates to the schedule file:

After the EQ the microseism started to rise, and the wind has picked up. I couldn't get past the CARM reduction steps so I attempted an initial aligmnet.... this didnt go so well. It may be a combo of the environment, but it wouldnt lock PRX and after it eventualy did, I had to go through SRC align step by step to keep it stable. Now I am trying to lock DRMI but it seems hard to hold the Xarm in green. Without BRSX this may get very difficult.

Just lost lock from an earthquake that isn't on USGS yet.  The BLRMS make it seem as if was a close one. Only HAM6 tripped so far, but I put the SEI_CONF into Earthquake_V2 to hopefully help from others tripping.

Today I made RF injections. The RF was not showing up strongly enough in the radio channels: I think we may need to amplify the antenna signal before going into the mixer, as we did in iLIGO. I would like to get this going and reinject. In addition, I think we need to remeasure some vibration coupling since Sheila zeroed the PIT offset in POP A last night. I got in a measurment today but would like to do a couple more. There is also the replacement of the piezo mount. And, we havent got to site anthropogenic yet, though if we dont get to these injections, I think we can assume the same sensitivites as we found for O1. Finally there are some more HEPI injections, though they are low on the list.

Peaks associated with BSC2 are the second largest source of environmentally driven peaks in DARM (next to the jitter peaks from vibration at the laser input) that we have found so far. We noticed that peaks in DARM at about 70, 105, and 198 Hz were amplified by acoustic injections in the LVEA. We tracked this to the beam splitter chamber and found that these peaks, as well as other peaks in DARM at 619.5 and 620.5 Hz, were increased by HEPI but not ISI injections (see Figure 1). This suggests that the culprit is on stage 0 of the seismic isolation, which is excited by HEPI but much less excited by ISI injections. The ITM elliptical baffles, hanging from stage 0 (Figure 2) are the most likely sources, either through scattering or clipping. Scattering would be our first guess, but I think we should also consider clipping because the peaks are not quite as broadened by sidebands as is typical of high Q peaks coupling through highly nonlinear scattering. The elliptical baffles have been previously implicated by a similar HEPI/ISI test (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=26016).

To be sure that the peaks were associated with stage 0 and not the table top, we made sure that the shaking was greater at the stage 2 GS13s for the ISI shaking than for the HEPI shaking, on all 3 axes, at the peak frequencies. Even though the shaking of the table was greater for the ISI injections than for the HEPI injections, the peaks were only increased by the HEPI injections (Fig. 1).

If we have time, we would like to try minimizing the peaks by putting DC offsets into HEPI.

Anamaria, Robert

TITLE: 11/28 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT:
    Wind: 13mph Gusts, 10mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.35 μm/s
QUICK SUMMARY: Smooth sailing and PEM work.
 

TITLE: 11/27 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Locked at NLN, Commissioning mode for injections
INCOMING OPERATOR: TJ
SHIFT SUMMARY:  Locked for all of the shift except for a brief ~30 min. lockloss.
LOG:

18:03 Robert starting injections, out of Observe.

20:11 Running a2l.

20:25 Closed ASAIR and REFL beam diverters at Robert's request, Robert to LVEA.

20:38 Lockloss.

21:15 Locked at NLN.  Only had to do some tweaking of PRMI to get locked.  Changed phase of PI mode 28 from -20 to 180 and phase of mode 27 from 120 to 100.  Staying in Commissioning mode for Robert.

21:30 Closed beam diverters again for Robert.

21:40 Robert to LVEA.

~1535 -1542 hrs. local -> Kyle in and out of LVEA, accidentally drug ladder across BSC8 dome a little, turned LVEA lights off @ 1542 hrs. local 

Reduced variac outputs by ~15%

We were locked for almost 9 hours until Robert started his injections for the day . . . or maybe that was just a coincidence.

TITLE: 11/27 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 71.4912Mpc
OUTGOING OPERATOR: Nutsinee
CURRENT ENVIRONMENT:
    Wind: 5mph Gusts, 4mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.29 μm/s
QUICK SUMMARY:  Locked in Observing for the past 5 hours. 
 

TITLE: 11/27 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Travis

SHIFT SUMMARY: Struggle to lock in the beginning but eventually got to NLN. POP90 jump during Noise Tuning even with SRC1 P loop oepn (I thought it's supposed to prevent the jump?). BNS range was slowly drifting downward so I gave SRM a bit of touch but eventually reverted the alignment. The range became stable after an hour or so.

LOG:

12:41-12:56 moved SRM P (and a bit in yaw) in attempt to recover the drift in range. I was afraid that it would drift too far and break the lock. I didn't go out of Observing due to an on going scheduled injection.

13:09-13:12 slowly moved SRM P back after I realized I made the noise worse. Also didn't go out of Observing.

I've scheduled 9 burst injections to be injected coherently into both IFOs. They will begin at 10:10 UTC (2:10 PT) and are spaced 20 minutes apart. The IFO will need to be in observation mode for these injections to go in. Here are the relevant lines in the schedule file.

1164276617 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-c_9_0.2.txt

1164277817 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-c_13_0.6.txt

1164279017 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-c_20_0.99.txt

1164280217 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-e_12_0.4.txt

1164281417 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-e_16_0.9.txt

1164282617 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_LongDuration/ADI-e_20_0.9.txt

1164283817 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_ShortDuration/SG_4.0e-22_8.9_70.txt

1164285017 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_ShortDuration/SG_2.0e-22_8.9_153.txt

1164286217 H1L1 INJECT_BURST_ACTIVE 1 1.0 config/Burst/Waveform/ER10_ShortDuration/SG_2.0e-22_8.9_285.txt

The waveforms are on the hardware injection svn. The schedule file gives the path to the text files from the Details directory.

I was curious to see how the BRSX was doing, so attached is a quick 5 day trend. It seems that it may be slowly ringing down after Jim vistied on Thursday.