H1 State:  Commissioning

Summary:

- IFO out of lock when I arrived, minor tweaks to return to Low Noise, alogged earlier

- Brief (3 minute) observe lock

- Relocking went smoothly

- IFO returned to Observe

- Maintenance started at 15:02UTC - JeffK working on ETMY ESD drive

To Do: angle to length measurement 

I did not do the angle to length measurement before going back to Observe, so it's planned for this morning after JeffK is done, and before he needs to break the lock.

J. Kissel

We're taking the IFO out of observation intent and beginning measurement prep for flipping the H1 ETMY bias sign. Stay tuned for detail aLOGs.

Called LLO and their GraceDB is now working, so they got the alarm.

OMC-DCPD_SUM_OUT goes first

First plot shows the glitch, and the lock survives a short time.

Second plot is the lock loss, and H1:ASC-AS_A_DC_SUM_OUT goes first.

TITLE:  10/14 EVE Shift:  23:00-07:00UTC (16:00-00:00PDT), all times posted in UTC     

STATE of H1:  H1 was down due to EY temperature variations & passed on to Cheryl to take over.

Incoming Operator:  Cheryl

Support:  Sheila was consulted over the phone

Quick Summary:  Mostly decent shift except for a lockloss toward the end of the shift which is most likely due to temperature variations at EY (see John's alog).  I handed over H1 to Cheryl as it was on its way to locking DRMI (no initial alignment was undertaken, only ETMy & TMSy were moved to restore H1 to locking).

Shift Activities:

• 23:58 Gerardo back from Ymid for leak checking prototype work
• 2:00 -3:05-ish  Robert & PEM non-Injections
• 5:04:41 - 5:12:29 "EY temperature is high" verbal alarming every 3-sec.  This started as I was on the phone with John as he was switching chillers and starting to cool things off.
• 5:38 Lockloss.  Most likely due to EY temperature variations.  OMC watchdog was tripped and had to be reset.

Both lock loss plots show H1:OMC-DCPD_SUM_OUT taking a sudden drop before any other channel shows a glitch.

Title: Owl Shift Transition Alog, Owl Shift 07:00-15:00UTC (00:00-08:00PT)

H1 State: Has relocked and made it to Low Noise and Observe, but only lasted 2-3 minutes - Relocked and back in Observe

Outgoing Operator: Corey

Help from: Sheila, Kiwamu

Details:

For the first lock, my interventions:

- I tweaked TMSY to raise the ALS arm power from 0.8 to 1.01

- I tweaked BS to lock DRMI, and then again after DRMI locked in order to get WFS to engage

- IFO went to Low Noise after that without issue

07:34:04UTC - IFO in Observe

07:37:06UTC - lock loss

For the second lock, my interventions:

- I tweaked BS after DRMI locked before WFS engaged

- IFO went to Low Noise after that without issue

08:06:14UTC - IFO in Observe

Issues?

08:07:53UTC - ETMY saturation

08:16UTC - Currently: IFO in Observe and range is 75Mpc

H1 dropped out of lock for no obvious reason, although when it came back, the Yarm looked fairly misaligned.  (so assuming the temperature excursion at EY was an issue).

Adjusted ETMy alignment for Locking Arms Green.  I was only able to get up to about 0.83.  And then at this point, I was stuck.  ISC LOCK had the user message:  "Waiting for arms to settle".  I would also get a flash of a message for ALS COMM of:  "COMM PLL or IMC not ready for handoff".  Haven't found anything in our Troubleshooting wiki or in Sheila's Operator training document.  ALOG searches are a pain and don't yield anything useful.  

Have left a voicemail with Kiwamu (On Call).  

I don't want to do an Initial Alignment because I don't know whether it's needed and would like to address this ALS issue first.

I noticed that the End Y temperature was not recoverling after Robert's HVAC shutdowns. Since it appears the chiller was not working correctly I have started the other one. Water temps are now falling. For the record I turned off Chiller 2 and turned on Chiller 1.This is done indirectly by turning the chiller's water pump off or on.We do not control the chiller remotely. There may be some overshoot on the VEA temperature as it corrects - so don't be surprised if it gets cold before it comes back to normal.

Tamper injections showed some upconversion from the tens of Hz region into the region above 60 Hz. The HVAC makes noise in this region so I did the test I had done in iLIGO, I shut down all turbines and chiller pad equipment on the entire site. This increased the range by almost 5 Mpc (see figure - the 3 range peaks are during the shutoff periods below).

Checks:

1) make sure all VFDs are running at 45 or less

2) if possible use only 2 turbines for the LVEA

We did not drop out of science mode but here are the times of the changes (Oct. 15 UTC):

2:05:00 shutdown started, 2:08:00 shutdown complete

2:18:00 startup started, 2:21:30 startup complete

2:31:00 shutdown started, 2:37:00 shutdown complete

2:47:00 startup started, 2:51:00 startup completed

3:01:00 shutdown started, 3:03:30 shutdown complete

3:13:30 startup started, 3:17:00 startup complete

TITLE:  10/14 EVE Shift:  23:00-07:00UTC (16:00-00:00PDT), all times posted in UTC     

H1's been locked for 8+hrs and in Observation Mode 22:58utc.  useism continues to trend down.

Robert took roughly an hour to perform some PEM non-injection work with the HVAC system (basically shutting off fans & chiller yard stuff).  With Landry's approval, Robert said we would stay in Observation Mode for these injections.  Here are my rough notes on the times:

• 2:00 Robert heading out for PEM non-Injections via HVAC changes
  • 2:05:30 Heard fans go OFF in control room, felt it warm up by 02:12.
  • 2:18:50 Heard fans come back on
• 2:27 Robert heading out for 2nd time. (had EY, EX, & LVEA Chiller Yard FMCS alarms, also had VacPrep dust alarm)
  • 2:31:20 heard fans go off
  • 2:43:30 fans back on? or a different change?
• 2:47 Robert heading out for 3rd time
  • 2:48:08 fans back on
• 2:59 Robert heading out for "last time"
  • 3:01:30 fans off
  • fans back on at what time?

Jordan, Sheila

In the summary pages, we can see that something non stationary appeared in DARM from about 80-250 Hz durring the long lock that spanned Oct 11th to 12th, and has stayed around.   Links to the spectra from the 11th  and the 12th.  

HVETO also came up with a lot of glitches in this frequency span starting on the 12th, (here) which were not around before.  These glitches are vetoed by things that seem like they could all be realted to corner statin ground motion: refl, IMC and AS WFS, all kinds of corner station seismic sensors, PEM accelerometers, MC suspensions.  

Although this noise seems to have appeared durring a time when the microseism was high for us, I think it is not directly related. (high microseism started approximately on the 9th, 2 days before this noise appeared and things are quieting down now but we still have the non stationary noise sometimes up to 200 Hz.)  

The blend switching could also seem like a culprit, but the blends were not switched at the begining of the lock in which this noise appeared, and we have been back on the normal (90mHz blends) today but we still have this noise.  We've seen scattering from the OMC with velocities this high before (17264 and 19195).  

Nutsinee and Robert have found that some of the glitches we are having today are due to RF45, but this doesn't seem to be the case on the 12th.