TITLE: 04/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Patrick
SHIFT SUMMARY:

Other than the Lockloss at the beginning and the violin mode oddities, a decent shift (even with the wind).  Virgo went down for under an hour; LLO still fighting high useism for the last 25+ hrs.
LOG:

• 14:55 H1 Lockloss
• 16:46 Back to Observing (after some fiddling around with violin modes....I reckon I could have returned sooner since it looks like SDF does not monitor violin mode gain changes)
• Note:  ~21:00  Magnitude 5.0 EQ from Japan R-waves were due to arrive, but did not see anything and remained in WINDY (since useism is high)

TITLE: 04/14 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 110Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 18mph Gusts, 15mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.29 μm/s 
QUICK SUMMARY:

No immediate issues.

H1 has been locked for 2.7hrs with range above 105Mpc.  DIAG_MAIN continues to say ETMy Mode 11 is high (but it looks fine).  Getting DARM glitches every 20-30min (one triggered a "DCPD" Verbal Alarm).  

Weatherwise, useism holding just under 90th percentile.  EY has sustained winds just under 20mph.

TITLE: 04/14 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Corey
SHIFT SUMMARY: locked and in Observe almost the entire shift
LOG:

• TJ relocked H1, I looked at violins and put H1 in Observe
• very few glitches that caused a verbal alarm
• I created a template for violin modes that's one dtt file, in my directory, file name: diaggui_all_violins_high_res.xml
  • it has 4 plots, 500Hz violins, 1000Hz violins, 1500Hz violins, and the CAL-Delta power spectrum from 5Hz to 1600Hz (big picture)
  • it's running a bandwidth of 0.001Hz, and I was running it in fixed mode with 20 averages
  • a snapshot is attached, a bit of a glitch was captured, as seen on the CAL-Delta power spectrum
• 1st harmonic violin modes have been growing over the last day or so, when I look at multiple locks
• Violin modes around 1500Hz are rung up
• H1 lost lock right before the end of my shift, Corey is relocking, Verbal Alarms gave an HTTS alarm as H1 broke lock, which may not mean anything, but not one I hear very often

TITLE: 04/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Cheryl
CURRENT ENVIRONMENT:
    Wind: 7mph Gusts, 6mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.37 μm/s

Low winds outside and useism about the same as it was yesterday morning (just under 90th percentile).
QUICK SUMMARY:

H1 had just dropped out before I walked in this morning.  Cheryl noted there was an HSTS Verbal Alarm.  ISC_LOCK was in READY state.  Moved on with locking, but ALSy was not happy, so tweaked on ETMy & TMSy w/ arm unlocked to go from 0.3 up to about 0.9.  After X & Y were locked with WFS, I tweaked up TMS for X &Y to take arms from about 1.0 to 1.1.  Then moving on now.

LLO is approaching 20hrs of nasty weather, and Virgo continues to hum along at 50Mpc.

TITLE: 04/14 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 110Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    Wind: 10mph Gusts, 8mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.36 μm/s
QUICK SUMMARY:  locked when I arrived, looked at violins, put in Observe

Since going to Observe, looked at 1st, 2nd, and 3rd violin harmonics, and 3rd harmonics are rung up.  Attached are plots of each violin harmonic and the spectrum from 1Hz to 1600Hz.

TITLE: 04/14 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Aligning
INCOMING OPERATOR: Cheryl
SHIFT SUMMARY: Lock loss as I started my shift, then observing for 2.5hrs. Then another lock loss, initial alignment, and no back to NLN for handoff.
LOG:

• 0240 Observing
• 0505 Lock loss

Every seismic trend FOM shows something happening in the y axis at the time of the lock loss. I will post plots soon.

After a handful of lock losses just before and just after the CARM reduction, I made to DC READOUT but the violins are higher than I am comfortable moving on with. I will damp these down and then move on.

The struggle to relock seems to be due to higher wind (15-35mph) and higher useism (~0.4um/s)

TITLE: 04/13 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 35mph Gusts, 29mph 5min avg
    Primary useism: 0.10 μm/s
    Secondary useism: 0.37 μm/s
QUICK SUMMARY: Just lost lock for reasons unknown as of right now. Wind is picking up, but nothign we cant handle yet.

TITLE: 04/13 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: TJ
SHIFT SUMMARY:

Saturday Public Tour day (over 65 cars, lost track over 100people, four tours before Keita's talk!)
LOG:

• 16:39 Lockloss
  • Adjusted ALSy polarization & took down to 0, but then ALSx shot up.  Took it down to 17.
  • Had a lockloss at DRMI TO POP
  • Tweaked BS at PRMI & then made it to NLN
• 17:58 OBSERVING
• 20:00 - (beyond 23:00?) Public Tour Day!  (4 so far, and a 5th one after Keita's talk)
• 23:09 Just had a lockloss as I sneak away.

Just wanted to show a plot of what happened when I remotely adjusted the polarization.  The thing which surprises me every time is how the polarization values take a jump  (ALSy went from 35 up to 170%!) when I turned ON the AC power (or it could have been from hitting the RESTORE button). 

Luckily it was fairly easy to minimize ALSy though...able to get it to under 1%.  I powered off the system and then moved on.  However, DIAG_MAIN caught my eye and I noticed now ALS X had high polarization (around 25%).  So I quickly took H1 down & repeated the process again to minimize ALSx (I could only get down to 17% though.)  After this, returned to locking H1 with no issues.

H1 locked for 2+hrs.  35+ vehicles pulling up to the parking lot for 1:30pm Public Tour.

Did not see anything obvious on signals.  And can't make out anything obvious from a glance at the Online Lockloss.

During the last lock, DIAG_MAIN said polarization for ALSy was high (it was hovering around 30 and up to 41), so I went to READY state on ISC_LOCK and did a remote adjustment of the polarization.  It's a bit scary because when restoring, polarization went all the way up to 170%!  But able to bring it down fairly easily (first with stepsize of 5).  One thing I neglected to check was ALSx, because when I was done with ALSy, ALSx was now high!  I was able to bring it down only to 17.  

For locking, had one lockloss around the DRMI_TO_POP step.  2nd attempt had a short DRMI lock of seconds...currently waiting for PRMI.  May try an Initial Alignment if no luck in the next few mintues.

NOTE:  Just locked PRMI.  Used BS mainly to adjust mostly PITCH and a little Yaw.  Moving back on to locking!