Had doubted what I had been told last week by an INFICON service tech. that our gauge could only tolerate 80C bake when the external electronics were removed.  I was able to confirm this in INFICON's published Operating Manual BAYARD-ALPERT PIRANI GAUGE tina46e1-a (2010-03) which also specifies this 80C limit even when the external electronics are removed (why?)-> I don't see anything in the materials exposed to vacuum list that would explain this low temperature limitation so I sent them an email requesting that they confirm.

J. Kissel, E. Goetz

The roaming PCALX calibration line was turned off for hardware injections over the weekend (LHO aLOG 31861). It looks like we have enough data at 5001.3 Hz (started at LHO aLOG 31738), so I'm restarting the line at the low frequency end (1001.3 Hz) and re-running through the lower half of the schedule in order to gather data at 30 [W] instead of the inconsistent 25 & 50 [W]. I include the old completed schedule for reference as well, just in case we don't get enough data before the run starts.


Frequency    Planned Amplitude        Planned Duration      Actual Amplitude    Start Time                 Stop Time                    Achieved Duration
(Hz)         (ct)                     (hh:mm)                   (ct)               (UTC)                    (UTC)                         (hh:mm)
---------------------------------------------------------------------------------------------------------------------------------------------------------
1001.3       35k                      02:00                   39322.0           Nov 28 2016 17:20:44 UTC
1501.3       35k                      02:00                   39322.0           
2001.3       35k                      02:00                   39322.0           
2501.3       35k                      05:00                   39322.0           
3001.3       35k                      05:00                   39322.0           
3501.3       35k                      05:00                   39322.0           
4001.3       40k                      10:00                   39322.0           
4301.3       40k                      10:00                   39322.0                
4501.3       40k                      10:00                   39322.0           
4801.3       40k                      10:00                   39222.0           
5001.3       40k                      10:00                   39222.0           


Frequency    Planned Amplitude        Planned Duration      Actual Amplitude    Start Time                 Stop Time                    Achieved Duration
(Hz)         (ct)                     (hh:mm)                   (ct)               (UTC)                    (UTC)                         (hh:mm)
---------------------------------------------------------------------------------------------------------------------------------------------------------
1001.3       35k                      02:00                   39322.0           Nov 11 2016 21:37:50 UTC    Nov 12 2016 03:28:21 UTC      ~several hours @ 25 W
1501.3       35k                      02:00                   39322.0           Oct 24 2016 15:26:57 UTC    Oct 31 2016 15:44:29 UTC      ~week @ 25 W
2001.3       35k                      02:00                   39322.0           Oct 17 2016 21:22:03 UTC    Oct 24 2016 15:26:57 UTC      several days (at both 50W and 25 W)
2501.3       35k                      05:00                   39322.0           Oct 12 2016 03:20:41 UTC    Oct 17 2016 21:22:03 UTC      days     @ 50 W
3001.3       35k                      05:00                   39322.0           Oct 06 2016 18:39:26 UTC    Oct 12 2016 03:20:41 UTC      days     @ 50 W
3501.3       35k                      05:00                   39322.0           Jul 06 2016 18:56:13 UTC    Oct 06 2016 18:39:26 UTC      months   @ 50 W
4001.3       40k                      10:00                   39322.0           Nov 12 2016 03:28:21 UTC    Nov 16 2016 22:17:29 UTC      days     @ 30 W (see LHO aLOG 31546 for caveats)
4301.3       40k                      10:00                   39322.0           Nov 16 2016 22:17:29 UTC    Nov 18 2016 17:08:49 UTC      days     @ 30 W          
4501.3       40k                      10:00                   39322.0           Nov 18 2016 17:08:49 UTC    Nov 20 2016 16:54:32 UTC      days     @ 30 W (see LHO aLOG 31610 for caveats)   
4801.3       40k                      10:00                   39222.0           Nov 20 2016 16:54:32 UTC    Nov 22 2016 23:56:06 UTC      days     @ 30 W
5001.3       40k                      10:00                   39222.0           Nov 22 2016 23:56:06 UTC    Nov 28 2016 17:20:44 UTC      days     @ 30 W (line was OFF and ON for Hardware INJ)

The IFO has been locked in low noise for ~7 hours now.  However, from 15:58-16:33 11/28/16 UTC (7:58-8:33am PT just this morning) the flow signal dropped down from 3 to 1.5 and then recovered back up to 3.  The lasers kept on chugging through this.  This caused an alarm to the operator who notified me - upon inspection, I see that chiller is still reading 4.0 flow at the chiller.  So all seems ok right now again...

REMINDER: O2 officially starts this Wed.

SEI: BRSx needs to be looked at opportunistically

SUS: nothing

CDS: PEM work @ mids

CDS software: Matlab license update Tues., DAQ work Tues.

PSL: PZT mount work today

OpLev: EX OpLev glitching

VAC: PT180 work ongoing

FAC: nothing

PEM: injection ongoing

LVEA walkthrough scheduled for tomorrow after maintenance activities complete.

TITLE: 11/28 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 70.5897Mpc
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    Wind: 32mph Gusts, 23mph 5min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.73 μm/s
QUICK SUMMARY:  Locked for the past 6+ hours.  Robert is still here, so we'll see how long that lasts.

State of H1: locked in NLN on POP WFS

• all activity in alog 31892
• since going back to Observe the rage has improved and then turned around

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

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.