Because  h1tw1's SSD is very close to full (97%) I don't have time to do the full checksum copy verification.  Jonathan suggests that perhaps we have time to checksum the source files before they have to be deleted to make space (the deletion can proceed in parallel on directories which have been check-summed)

I am check-summing the source files from /trend/minute_raw_1229108478/[0-ff] and recording the results in /trend/minute_raw_1229108478_cksums/[0-ff]. The check sum file is the name of the source file with a .cksum suffix.

WP8012 h1sqz fixing DAQ channels with lower case characters

Sheila, Dave:

A new h1sqz model was installed, DAQ restart needed

WP8011 New h1susproc model, processing moved from h1oaf

Patrick, Jeff K, Dave:

A brand new h1susproc model was started for the first time on h1oaf1. Parts of h1oaf's processing were moved to the new model. DAQ restart needed.

WP8006 h1tw1 raw minute trends offloading

Dave:

The copying of raw minute trends from SSD to spinning media completed in time for the DAQ restart. h1nds1 is now server the past 5 months of minute trends from its new location.

Reboot h1guardian1

TJ, Dave:

h1guardian1 was rebooted. For the first time all the nodes automatically started with no intervention needed.

WP7997 TCS inverse RH filtering

TiVo, Danni, Dave:

A new h1tcscs model was installed. DAQ restart needed.

DAQ Restart

Dave:

The DAQ was restarted at the end of maintenance for:

new h1susproc model (ini and par), h1oaf, h1sqz, h1tcscs, various updated EDCU files for new model and a new daqdrc configuration for h1nds1.

Jeff Bidler, Joshua Smith Marissa Walker

While doing the DQ shift for ER13, I found harmonics in the strain which lead to finding 48.3Hz as the first harmonic peak, showing up sharply in central station accelerometers, loudest in HAM3 PR2 ACC. In DARM it is broadened, possibly by scattering, and shows up more in its 2nd and 3rd harmonics. The accelerometer is quantized to switch up and down by 0.7 Hz.

TITLE: 12/18 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY: Wind gusts up to 40mph and high useism are still an issue. We extended maintenance activities a bit further today because of this. Team TCS has the IFO now, and when the wind dies down a bit we will continue commissioning.
LOG:

1428 Chris to MX to retrieve some tools
1500 Chris back
1604 Vanessa to LVEA
1610 Norco at gate, headed to EY
1611 Karen to MY then EY
1628 Ed to EY to center OpLev
1629 Jeff B to Ends to reset dust monitors
1632 HFD on site for fire suppression testing
1646 Gerardo to Mids and then LVEA
1652 Chris to LVEA West bay to work on shorter clean rooms
1655 Karen done, on her way back
1702 Terry, Nutsinee to LVEA ISCT6 area
1711 Fil to EY start start pico work
1721 Ed to LVEA to center BS OpLev
1723 Jeff B back
1741 HAM3 testing starting
1750 Ed back from LEA and headed to EX to recenter
1757 Nutsinee out
1758 Norco at gate to MX
1800 Betsy, Travis, Sheila to LVEA to start on cleaning adventure
1803 HFD off site
1819 Ed from EX to EY
1827 IMC WFS history cleared
1848 Terry out
1855 Ed back
1856 Chandra to MY
1857 Fil back from EY and headed to EX for pico work
1900 Cheryl, Jason to LVEA IOT2L
1905 Sheila out
1910 Betsy, Travis out
1924 Rick, Jeff J out of LVEA
1932 Gerardo back from MX, equipment still running
1946 Nutsinee to LVEA ISCT6
1956 H1OAF model restart
2000 Fil back
2010 Chris done
2020 Travis in and out of LVEA to grab a part
2109 HFD on site draining fire hydrant in vertex
2122 Fil to LVEA to pull cables along ground near BSCs
2123 Ed to LVEA to inventory
2124 HFD done and heading out
2200 Gerardo to MX
2230 Cheryl, Jason out
2259 Fil, Ed out
2300 DAQ restart
2306 h1guardian1 reboot

Since ER13 completed, I set H1:ODC-AUTO_UNSET_OBS_INTENT back to 1. I also reverted the INJ ODC masks.

What these mean is that it would be impossible to go into OBSERVING mode (which is a good thing during commissioning) and that bogus injection bits are going to be set in calibration state vector (which is a bad thing) unless some proper fixes are implemented some time in the future.

See alog 45969 and 45975.

[Cheryl, Jenne, Sheila]

We decided that since it was (past) lunchtime, we'd use the picomotors to center the IMC WFS rather than go back out onto IOT2.  So, after the IOT2 work from earlier today, the WFS have been centered via picos.

FRS 11354

The picomotor controllers at the end stations were being powered off the ±24V ISC rack power. This morning ran new cables from SUS-R1 to ISCTEX/EY. New 24V is same power used to power Beckhoff/Illuminator electronics. Part of on going investigation that causes ALS shutter to close when picomotor is enabled. New power configuration did not fix issue.

The end station and beam splitter OpLevs have been re-centered. The EY laser was adjusted in power to relieve the residual glitching. the power was all the way up therefore the adjustment was made down by 20mv. I hope this was for the better. Only time will tell.

    All three vacuum pumps (EY, EX, CS) are running well. Temperatures were all less than 150f. Made air bleed adjustments at End-X and the corner station.

   Note: There is carbon dust accumulation on the muffler and the output filter port on the corner station pump. This is a sign of late stage wear on the vanes. There is no spare for this pump, so it will need rebuilding in the near future.

   Closing FAMIS #7930

TITLE: 12/18 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Maintenance
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 16mph Gusts, 13mph 5min avg
    Primary useism: 0.14 μm/s
    Secondary useism: 0.97 μm/s
QUICK SUMMARY: ER13 has come to an end. Sadly, not much locking for us overnight. Maintenance Tuesday has begun, and people are already at work.

TITLE: 12/18 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY:

Locks started out in the ~20min range 1/4 into the shift.  Alignment was fine and able to get up to NOMINAL LOW NOISE (NLN) w/ no major issues for a few hours (but only with short locks).  But for the last 2-3hrs H1 locking degraded more and only able to stay at NLN for 1-3min at a time.  Some notes:

• useism holds steady at 1um/sec.  SEI CONFIG started out at MICROSEISM, but guidance said to go to this only if we are >>1.5um/sec.  So I took us down to WINDY.  But I don't think either state had a noticeable difference.  
• Had issues with ALSy at one point.  Thought it was related to the TCSy Laser because of an "unstalling" note in the GRD log, but eventually found out it was just a bad alignment (thanks to Thomas for guidance on via FaceTime).  Took ISC LOCK to pause, ALS Yarm to UNLOCKED and tweaked ETMy to maximize flashes.
• Tried skipping and not-skipping the LOWNOISE_COIL_DRIVER step in ISC_LOCK, but did not make much of a difference at the end of the shift.
• All other notes posted by commissioners earlier.
• POP18 has steadily drifted lower (faster) with every progressing lock in the shift & this was mentioned to be correlated with locklosses.

Leaving in the DOWN state overnight.

Sheila, Daniel, Terry, Corey, Craig, Nutsinee

Tonight we injected squeeze into the IFO at several input CLF power just to see if it makes any difference in noise level. All the phase settings were held the same. The 3uW transmitted injection was done in one lock stretch and the other two (4.5uW and 1uW) was done during another lock stretch (IFO will only stay locked 15 mins at a time). The LO common gain was 0dB (6dB for 1uW injection) and fast gain was 11dB for all injection. No boosts were engaged. We tried to see some squeezing/anti squeezing but lost lock shortly after as the IFO hits 15 mins mark from power up.

The weird hump at >1kHz came back during one of the lock stretch. I looked back and this seems to happen when SHG lost lock completely. So we must have injected uncontrolled CLF in and out of the OMC DCPD during the time (as SHG was scanning for lock point and OPO also was scanning for lock point). 

Have had some NLN locks...but they have only been lasting for 15-20min at a time.  With that, Commissioners have been using that time for two tasks:  1) PRC (& SRC) gain measurements [Craig] & 2) Injecting Squeezer measurements [Sheila, Daniel, Nutsinee & Terry].  They have just left for the night, so I will try to make some attempts at Observing. 

(Unfortunately, right now ALSy is giving me grief and not locking---alignment has been fine, so I will look into this.  I also was not able to get Dan B.'s script to work for ACCEPTING SDF Diffs, so I'll have to do that by hand when I get back to NLN.)

Craig, Corey, Nutsinee, Terry

Earlier today Hang tried turning on a res-G in PRC2 P to stabilize our IFO alignment.  This did not succeed.
During this time he thought about the PRCL error signal depending on both the sideband and carrier gain in the PRC, and shared with me an idea about the error signal potentially changing sign with low enough sideband gain (Eq 19, T1500325)


I monitored the optical gain drop of PRCL during the last power-up by injecting a line into PRM at 138 Hz and watching the line response during the power-up.  It dropped by about 60% before we lost lock.  

Our PRCL UGF is ~60 Hz nominally.  I adjusted the PRCL1 digital gain to compensate for the drop in PRCL optical gain to keep the UGF at 60 Hz.  The PRCL1 digital gain started at 11.0, I moved it to 14.3 then 17.2.

I did the same for SRCL.  It's nominal UGF was 20 Hz, I adjusted it up by 25% to keep it there, from -8.8 to -11.0.  The total SRCL optical gain fell by 30% from IFO thermalization from INCREASE_POWER to end of lock.

I also measured MICH, whose nominal UGF is 9 Hz.  MICH optical gain did not seem to change during power-up.  

All this corroborates the POPAIR B 18 and 90 MHz story: The 9 MHz falls significantly due to IFO self-heating, but the 45 MHz does not change at all.

Holding the LSC gains steady by hand during the last lock did not improve IFO angular stability.

Posted are the before and after IFO thermalization of the lines I injected into PRCL and SRCL during power-up.  

TCS x&y Chillers were checked tonight and they were at their nominal high values---so no water was added.  

Niko has a temporary instance of the lockloss analysis running here:

https://ldas-jobs.ligo-wa.caltech.edu/~yannick.lecoeuche/locklost/all/

This is in part because we sometimes have missing locklosses and as a temporary way to deal with it Niko can rerun it here for missing locklosses. 

We modified the boost filters in the ARM ASC loops to try to simultaneously put more gain at microseismic which dominates our RMS, and not rely too much on the loop features so that they are more stable as the input power changes.

In the first and second plot we show the boost filter for DH_P and C/DH_Y. In the third and forth plot we are the modeled DH_P and C/DH_Y open loop transfer functions at an input level of 10 W. The CH_P boost is not yet changed since that loop seemed to be fine for now.

We also tried to put a res gain at 0.12 Hz in the PRC2 P loop to help stabilize the POP18 fluctuations we've been seeing recently. Doesn't seemed to solve the problem though.

Following the Qs measurements done by Terra and I a couple of days ago (alog 45812), we wanted to measure the max PI gain for the 15kHz, 15.5kHz and 18kHz (aliased from 47.5kHz) mechanical modes. This is done by ringing up and down these modes for the different test masses during a self heating thermal transient and 2.4 W ring heater transient. When the HOM3 and the mechanical mode frequencies overlap, the maximum PI gain is achieved.

Carl's python script was used to excite the mechanical modes with the ESDs every 300 seconds, similarly to what has been done at LLO (see alog 41630). By fitting the ringdowns, the Qs are then estimated. I've used a homemade matlab script to do the tau fits, manually rejecting bad or fishy data.

We managed to have a ~6hours long stretch (see Dec11.pdf) and ~1h stretch (see Dec12.pdf) both at 20W. During the first lock, we monitored the 15kHz and 18kHz modes (unfortunately, we didn't monitor the 15.5kHz). The measured Qs are shown in Dec11.pdf. relative to the simulated HOM3 spacing (x3). We only observe an evolution of Q (apart for statistical deviation) for mode 14.98 IX, 14,98 IY, 15.01 EY, 15.08 EY and 17.94 EX. Unfortunately, this doesn't seem to correlate with the HOM spacing. Could the simulation be off?

On the following days, the longest lock that we manage to have was an hour. The measured Qs as we go through self heating are shown in Dec12.pdf. The self heating goes fast and we don't have a lot of data point, but I put it there if people are interested. No obvious change in Qs.

To conclude, I would say we have some interesting data that are worth to analyze a little more, as we did see some nice Q changes the first night. By comparing these measurements with what has been done at LLO, we should come up with some interesting numbers... We will work on that in the coming weeks.