Hugh & Jeff B.,

   Checked the dust monitor vacuum pumps. Adjusted the vacuum pressure at End-Y; all others were within spec. All pump temperatures are within spec. 

   There is a bit of carbon build up on the exhaust muffler on the End-Y pump. Will continue to monitor this pump for a future rebuild. 

   Closing FAMIS #12987 

   Hugh & Jeff B.

   Checked all running HEPI pump stations. No change fluid levels. Check known drips and looked over the systems for unknown drips. All OK, and no unknown drips found. 

   Closing FAMIS #13424 

Since Saturday the /opt/rtcds file system usage shot up from 91% to 99%. I'm working on freeing up space and figuring out what is taking this space.

TITLE: 05/14 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY: locked until 7.7M EQ
LOG:

• CW INJ stopped twice, taking H1 out of Observe, once after lock loss, restarted now (alog 49215)
• Maintenance started early, at 14:27 UTC (7:27 local) due to the EQ (alogs 49216 and 49217)
• 14:27 UTC - ChrisS to LVEA and outbuildings, Maintenance
• 14:27 UTC - Karen to Optics Lab, is now headed to outbuildings

TITLE: 05/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    Wind: 8mph Gusts, 5mph 5min avg
    Primary useism: 3.39 μm/s
    Secondary useism: 0.39 μm/s
QUICK SUMMARY:

H1 down due to 7+ EQ near Papua New Guinea.  SEI_CONF is in LARGE_EQ_NOBRSXY state (& will probably stay in this state for a while since velocity is over 1 um/s).

Plan is to stay Laser HAZARD in the morning for camera work, but go to SAFE for HAM5/6 on-chamber work.

Based on the current ground motion, and 33 minutes to official Maintenance, early Maintenance due to EQ started at 7: 27 PT, 14:27 UTC.

Taking H1 to Down, SEI in Very Large EQ

round 1

• 11:14:28 UTC - CW INJ stopped (1241867686)
• 11:14:33 UTC - H1 out of Observe
• ~11:22 UTC - violin mode guardian cycled to add ETMY mode4 damping (gain was 0, now -3)
• ~11:20 UTC - CW INJ auto restart  (1241868074)
• 11:27 UTC - H1 back into Observe

12:00 UTC - my CR machine reboots

round 2

• 12:25:58 UTC - CW INJ stopped (1241871976)
• 12:2606 UTC - H1 out of Observe
• ~12:32 UTC - CW INJ auto restart (1241872366)
• 12:34:52 UTC - H1 back into Observe

attached: 1) CA-INJ_CW channel stops and starts, 2) H1CALINJ_GDS_TP.adl medm screenshot, when injection is running

TITLE: 05/14 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
OUTGOING OPERATOR: Ed
CURRENT ENVIRONMENT:
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.19 μm/s
QUICK SUMMARY: locked 6+ hours

TITLE: 05/14 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY:

Quiet shift in general. All the "fun" stuff in my last entry. Re-hashed the aforementioned with Cheryl. Handing off H1 locked and Observing at 113-115.5Mpc
LOG:

Sheila, Georgia

Today, in preparation for a possible input power increase later this week, we tried to optimise some of our TCS settings. Following on from previous CO2 steps, we took a small 100mW step up in CO2X power (to 700 mW), expecting the frequency noise coupling to improve like last time. What we saw was:

• Improved RF18 RF90 build ups (very slight) (good, but unexpected)
• Drop in range BLRMS6 (500Hz-1kHz) (good)
• maybe a decrease in BNS range? (bad)
• Increased Decreased high-frequency frequency and intensity noise coupling (bad) good!

The time series of several diagnostics is shown in the first attachment. (Edit: removed comment about kappa_c and fc since we can't really tell if they are changing). Perplexingly, this is the opposite of what happened when CO2X was last increased. Since then we have change SR3 heater, and the spot positions. I'm also confused about how the frequnecy noise coupling (measured with the noise budget injections) got worse while the BLRMS improved. (edit: see sheila's comment)

Given the frequency noise coupling we decided to then decrease the CO2 power to 500 mW (100 mW less than nominal), and saw the opposite of the effect listed above (second attachment). I think we did not get a chance to remeasure the frequency and intensity noise coupling before losing lock though.

I had a look at some DARM spectra with 500 averages (third & fourth attachments), and it looks like the high frequency noise shows opposite behaviour to the frequency noise coupling we measured. Based on the DARM spectra and buildups I'd suggest we should increase the CO2X power. For now it is back to the nominal 600 mW.

Ed, Georgia

23:15 H1 lost lock - unknown reason https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1241824577

23:20 I had to zero TR COMM offsets for both arms

23:38 Initial Alignment

•  PRC was being a problem so Georgia ended up hand aligning PRM to maximize the POP_A_SUM signal at PREP_PRC_ALIGN

01:15 Accepted a number of optical alignment diffs

01:!7 H1 back to Observing - Livingston has been down for a couple of hours after about a 1 hr re-lock.

0.5s before the lockloss there was some glitching in ETMX L1 L2 and L3 (bottom row of attachment).

TITLE: 05/13 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 111Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY:  Locked for the entire shift.  Nothing to report.
LOG:

This afternoon we were preparing to increase the CO2_X power; we wanted to measure intensity noise but found the ISS second loop slow offset servo was saturated. It looks like in this lock, when we DC-coupled the second loop the output to the slow servo just ran away (see first attachment, top right is the slow servo output). Perhaps when we held the output of the AC coupling servo it was too far away from the mean (top left trace)? Sheila looked back in time several months and a saturation of this scale has not occurred before. She slowly ramped the gain to zero, which caused the diffracted power to increase from 2.5% to 3.2%.

We have left this servo off for now, and accepted a few PSL-ISS related SDF differences.

To clarify: for the duration of this lock the ISS second loop slow feedback has not been nominal, from ~1241739043 to ~1241809666 the digital servo was saturating, and after this time it was turned off. This has not affected the lock.

Addressed TCS Chillers (11:29 -11:36 PST)

• TCSx Chiller:  Had level of 28.8 cm.  Added 450mL for 30.1cm.
• TCSy Chiller:  Had level of 9.5 cm.  Added 240mL for 10.0 cm.

    Laser Status:
    Front End Power is 32.27W (should be around 30 W)
    70W Output Power is 70.37W
    Front End Watch is GREEN
    70W Watch is GREEN

    PMC:
    It has been locked 5 days, 22 hr 22 minutes (should be days/weeks)
    Reflected power = 10.03Watts
    Transmitted power = 54.82Watts
    PowerSum = 64.85Watts.

    FSS:
    It has been locked for 0 days 19 hr and 55 min (should be days/weeks)
    TPD[V] = 4.056V (min 0.9V)

    ISS:
    The diffracted power is around 2.4%
    Last saturation event was 0 days 20 hours and 7 minutes ago (should be days/weeks)

    Possible Issues: