TITLE: 06/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 69Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:  Commissioning for the first half of the day, Observing for the second.  H1 locked for ~6 hours, Observing for ~3 hours.  No issues to report.
LOG:  See previous aLogs.  A couple of locklosses during Commissioning period that I didn't bother to log because they were CCLs (Commissioner Caused Lockloss);).

It seems that there is high coherence between ASC CSOFT/CHARD and LSC PRCL/MCL. Please see the attached plots (data from Jun 20, 02:00:00 UTC, for 1024s).

Especially with PRCL, the ~0.4 Hz peak seems to be related to the dP/dtheta instability (37046 and alogs referred therein). Does this indicate that there is a large cross-coupling from LSC to ASC ( i.e. a large dtheta/dF term in the dP/dtheta loop)? Would l2a ff (see, e.g., LLO 31756) help?

Short summary posted below. See here for full results.

• 48.9% overall duty factor. Opportunistic commissioning and recurring 0.4Hz pitch instability ate into observation time.
• 65-70 Mpc BNS range typical for observation segments.
• Acoustic noise reappeared at EY - Hveto round 1 winner on Monday H1:PEM-EY_MIC_VEA_MINUSY_DQ
• 0.44 Hz oscillation in optics pitch degraded dataquality, mostly on Tuesday

Sheila logged that the two lock-losses on Tuesday were caused when her excitation measurement on the PSL ISS THIRDLOOP SERVO was both aborted and when it completed correctly. It would appear that this is due to the filter being used by the excitation has a slow ring down and it was outputting a non-zero value when the awgtpman killed the excitation. This caused a sharp transient step which in this case resulted in the output of the THIRDLOOP_SERVO filter going very high.

This problem was initially reported by Jenne in this alog. My analysis was reported in this alog. Daniel, Jim and myself came up with a work-around described in this alog  and in this wiki  

To verify the filter in this case has a long ring down, I ran it on a test stand front end, it does indeed have a long ring down, image is attached.

I had opened FRS8368  for this issue, which can now be closed.

The flow rate in the power meter flow circuit has gotten extremely noisy in the past 3 days.  Since no debris
was observed in the filters, one wonders if it's the flow sensor or perhaps the Beckhoff terminal input that
processes the output of the flow sensor.

Locked at NLN for 2.5 hours for commissioning work.  Set to Observe at 19:46 UTC after Sheila's measurement wrapped up.

Added 225 mL H2O to Xtal chiller.  Diode chiller was good.  Filters still appear clean.  This closes FAMIS task 6528.

While LLO is still down, Sheila is planning to do some commissioning for a couple of hours.  Will monitor the state of LLO and revert to Observing when they get locked.

TITLE: 06/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: EARTHQUAKE
INCOMING OPERATOR: Travis
SHIFT SUMMARY:

Fairly standard shift until a big Guatamalan EQ took H1 down for going on 2.5hrs.  EQ band recently low enough to start locking up H1 again.  

Saw a pair of porcupines.
LOG:

• 8:36 TCSy Chiller Flow Low Alarms begin & Topped Off (see alog)
• 10:38 -11:38 GRB (Swift) Stand Down Time.
• 12:39:  EQ Lockloss
  • 13:46 Starting to align ALS.  ALSy was in La La Land no matter what ETM tweaks I tried.  I Cleared History for End Y Overview and tried to reduce error signals, but I didn't get very far.  Ultimately, I started an Initial Alignment over for ALSy.  In retrospect, I should have just waited a little longer for the EQ to die down a little.
  • Currently locking on steps after DRMI as I hand off to Travis

TITLE: 06/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 11mph Gusts, 8mph 5min avg
    Primary useism: 0.09 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:  Relocking after an EQ ~2 hours ago.  Currently at the CARM reduction steps, so progressing well.  No other issues were handed off.

• 12:36 (5:36amPDT):  Incoming EQ Verbal alarm (but don't see anything on USGS)
• 12:39:  USGS posts 6.8 Guatamala EQ 
• 12:39:  H1 lockloss
• 12:40:  EQ seen on BLRMS (eventually gets to 11um/s!)
• 12:49:  EX ISI Tripped & Seismon transitioned to EARTH_QUAKE_V2.
• 12:53:  IMC breaking lock.
• 12:55:  Noise Eater out of range...toggled it off/on
• 12:56:  Many other ISIs & BS trips
• 13:11:  Everything GREEN again for ISI/SUS & IMC locked....knock on wood.

Sun almost rising.  H1/GEO OBSERVING.  Virgo Locking.  Winds are about the same.  And H1 is at 65Mpc.

Received multiple TCSy Chiller flow is low Verbal Alarms at 8:36utc.

Went out to look at the TCS chillers.  TCSy was at about its midpoint (~5cm).  Topped off with 150mL of water to get it to 8.5mL.  It's flow was reading at 4.0gpm with temp of 20.9C.

TITLE: 06/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 65Mpc
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 21mph Gusts, 17mph 5min avg
    Primary useism: 0.12 μm/s
    Secondary useism: 0.17 μm/s

Breezier outside than last night.  Winds steady just under 20mph.  useism has taken a slight step up over the last 24hrs to take us up to the 50th percentile.  Clear night out.
QUICK SUMMARY:

H1 observing for 4.75hrs (with 13hr lock) and a BNS range hovering around 65Mpc; by eye can see slight 0.16Hz oscillation on POP & PR Gain signals on strip tool..  L1 out due to storm activity (no operator on shift).

   Back to Observing after commissioning work finished for the day. No LHO issues or problems to report. 
   LLO IFO is in a DOWN state due to continued microseism. The site is unmanned until tomorrow morning.  

HAM 11, 12 annulus ion pumps are known failures. Vacuum will investigate next chance we can get into LVEA.

Today I spent some time on the LSC, because SRCL has been one of the dominant noises in DARM from 20Hz-60Hz for a while.

1) Retuning POP45 demod phase.  I changed the POP45 demod phase from 86.5 to 67.1, to minimize the SRM signal in POP 45Q. I also checked that the current phasing of POP9 does a good job of minimizing the PRM signal in POP9Q. I did this following the procedure Evan Hall describes in 24933.

• As I rotated the phase, the MICH loop shape changed, as well as the couplings from MICH to PRCL and SRCL.  (1st screenshot).  SRCL and PRCL didn't change, but the scross couplings from MICH to those loops did change, which is also shown in the screenshot.
• The second screenshot shows that all 3 DRMI control signals had small reductions in the control signals after changing the demod phase.

2) Retuning PRCL-SRCL subtration in input matrix.  I found that the input matrix element subtracting POP9I from POP45I for SRCL wasn't doing its job of making SRCL insensitive to PRCL very well.  By changing the element from -0.024 to -0.03195 I saw a 15dB reduction in the coupling from a PRM drive to the SRCL error signal, but this didn't reduce our control signals much. The third attached screenshot shows the impact on the coherence between DARM and DRMI signals of the demod phase change and the input matrix tuning. MICH and SRCL are both improved a bit.

Other things we did today:

• took measurements for reutning SRCL FF which I will use to calculate filters tomorrow. 
• Measurements for LSC sensing matrix
• Tried old settings for MICH->PR2, which made the interferometer unstable.  We might want to retune this to reduce the PRCL control signal. (25656)
• Tried not reducing the modulation depth for RF9, which also caused something to go unstable. Next time we try this we might want to go through noise tunings step by step to see what the problem is. 
• We have observed that since the vent the wind seems to have a negative impact on our range.  We have mostly been in commissioning mode during the windiest times, but if we are in observing and it is windy we might want detchar to take a look. 

I restarted the code which captures H0 MEDM images and posts them to the web

This has captured recent Vacuum and FMCS changes.

Keith sent me the LLO dmt-viewer configuration file to plot H1, L1 and V1 ranges on our nuc0 wall display machine. I have named this file:

/home/controls/HLV-Range.xml (we were using HL-Range2.xml).

I changed the plotting options to remove the symbols and widen the lines to 2.0

I found that the script to auto-position the application did not work (I had copied setup_DMTviewer.sh and setup_HLV_DMTviewer.sh and ran the latter), so I moved the window in place manually with some finagling.