Green initial alignment set for Xarm, not for Yarm

[JeffK, Jenne]

With the current alignment of the IFO (same QPD setpoints for POP_A and SOFT), we reset the green initial alignment setpoints for the Xarm green WFS and camera spot. 

We tried to move the Yarm input pointing QPD setpoints by hand to get the Yarm green to lock while we are locked, but couldn't get the Yarm to lock on a 00 mode without falling off the PD.  So, for now, rather than pico-ing, we have left the Yarm initial alignment setpoints alone (reverted to how they were earlier today). 

We're considering moving our POP and / or SOFT setpoints to get POP18 back up and more smooth, so we'll just live for now with having to engage the full ifo asc slowly.

Guardian prep for ER13

I did two things to prep for ER13:

1. I updated the IFO node exclude list. (List below, plus all of the SEI configuration nodes)
2. Added a few lines in ISC_LOCK.py to attempt to turn the Observation Bit ON between the hours of midnight and 8am local time. The idea here is that if we manage to make it to Nominal Low Noise when there is no one on site, it would be nice to have the bit turned on. The problem is that if the IFO node does not give the OK that all other nodes are ready, then we can't flip the bit anyway. (For tonight, I have the actual channel call commented out to test this, but will uncomment it tomorrow if all goes well.)
   1. This will also change the Observatory Mode to Observing in NLN and then back to Commissioning in DOWN. But again, only between the hours of midnight and 8am local.
   2. If a commissioner is working during these hours, they will need unset the Observation Ready Bit and change the Observatory Mode.

---

EXCLUDE_NODES = [
    'BRSX_STAT',
    'BRSY_STAT',
    'BOUNCE_MODE_DAMPING',
    'CDS_CA_COPY',
    'DIAG_MAIN',
    'HIGH_FREQ_LINES',
    'INJ_TRANS',
    'IMC_LOCK',
    'ROLL_MODE_DAMPING',
    'SEI_CONF',
    'SQZ_SHG',
    'SQZ_OPO',
    'SQZ_PLL',
    'SQZ_FREQ',
    'SQZ_CLF',
    'SQZ_LO',
    'SQZ_BEATNOTE',
    'SQZ_LOCK',
    'SR3_CAGE_SERVO',
    'SUS_CONFIG',
    'SUS_OPO',
    'SUS_PI',
    'TCS_RH_MON',
    'VIOLIN_DAMPER',
    ]

Python script to run a test on IMC sensor correction gains

At Rana's suggestion, I'd like to have the operators or commissioners run a script I've written during sometime when the IFO is left locked on it's own (i.e. commissioners are done and leaving and the IFO is in at least DC Readout). The script just makes tweaks to the out put gains of the HAM2 & HAM3 FIR sensor correction gains. After the script is run, I'll collect data and see what settings (if any) seem to work best for the interferometer. The script will keep running while the IFO is locked, but should quit if it unlocks. Rana has said he has some stuff to add to make it quit gracefully that he plans to share in the alog. 

The script is in userapps /isi/h1/scripts and can be run from the command line by typing ./imc_sc_gain_diddle.py in that folder. If someone could try running this over the engineering run, I would appreciate it.

reminder about November times when we were powering up

This is just a reminder that in November, with the same TCS settings that we are currently using, we were able to power up to 28 W and be stable for about 4 hours.  We were also locked at 32W input power for about 15 minutes.  

If people want times to compare current power ups, ASC settings, ect to compare to these locks were Nov 11th from about 1 UTC to 14 UTC.  Some trends are attached here. 

Shift Summary - Day

TITLE: 12/13 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:

14:50 (6:50) Rick and Sudarshan to EY -- End station calibration

15:20 (7:20) Chris to MX -- scaffold setup

16:00 (8:00) Phiffer on site

16:00 (8:00) Start of shift

16:35 (8:35) Karen to EY

16:40 (8:40) Fil, Ed to EX

16:47 (8:47) Karen leaving EY

16:53 (8:53) Richard to LVEA -- check out ALS fibers

16:54 (8:54) EY back to laser safe

17:12 (9:12) Richard out of LVEA

17:17 (9:17) Karen to LVEA

17:27 (9:27) Vanessa to LVEA

17:27 (9:27) Ed, Fil back from EX

17:31 (9:31) Chris to LVEA -- grab scaffolding

17:45 (9:45) Richard to CER

17:58 (9:58) Chris out of LVEA

18:05 (10:05) Vanessa out to LVEA, going to EX, MX

18:45 (10:45) Nutsinee to ISCT6

18:56 (10:56) Chandra to LVEA

18:59 (10:59) Nutsinee out of LVEA

21:45 (13:45) Chris to MX

22:26 (14:26) Nutsinee to ISCT6

22:29 (14:29) Chris back from MX

00:00 (16:00) End of shift

Wavefront maps and trend for changing TCS pre-loading.

Dan Brown, Danny V, TVo

Because backing off the TCS settings to a less aggressive pre-loading made DRMI locking easier, we wanted to know how different the wavefront and the spherical power readings are between the two pre-loaded states.  Yesterday we were able to get approximately 5000 seconds of data before locking began where we made these TCS changes,  attached is the time series and estimating the difference in spherical lensing:

Spherical power difference for ITMX: -8.0 udiopters

Spherical power difference for ITMY: +10.0 udiopters

They are seemingly small but maybe enough to be a problem in DRMI acquisition.  I also attached a wavefront map which shows that ITMX has pretty good centering but ITMY shows considerable asymmetric heating, color bar is in units of optical path distortion (nm).  This  level of badness was not seen during our Thanksgiving tests so I'm a little perplexed on why this is so misaligned.

For ER13, list of remote logins to CDS shown in centre of Overview MEDM

ER13 operators can view the first 6 remote users logged into CDS from the CDS Overview MEDM (see attachment). For the full list press the "Remote Access" button.

ALS Fiber glitches

With ALS glitching rearing its ugly head again We went through and tightened all of the connections and re dressed some of the fibers that would be vulnerable.  Tightening connections at the phase box changed the phase EX from 21 to 46 degrees.  Adjustment at all of the field connections glitched the system but EX settled back to 21 degrees EY went from 1 to 3 degrees.  Jenne then adjusted the phase down to 16.   Squeezing also saw a change from our work though we did ot change anything on that path.

More gain in COMM path

With the large excursions in MC_F this morning with ALS locked, I tried increasing some gain in LSC-MCL.  It seems to be good so far, but I have not yet put it in the guardian.  In LSC-MCL I have a new FM7 that I've been engaging by hand, and then have been hand-increasing the digital gain from 240 to 300.  Even with this high microseism and high-ish wind, I'm able to stay locked on ALS for many minutes. 

PCALX PINJX Hardware Injection Filters OFF During Testing

J. Kissel, K. Riles

As the hardware injection team debugs problems with the hardware injection system, Keith requested I turn off the output to the PINJX HARDWARE filter bank. I've done so.
Also, while thinking about hardware injections, I added a call to the 
    /opt/rtcds/userapps/release/cal/common/medm/CAL_INJ_CONTROL.adl 
screen with calls to the PINJY infrastructure installed in October (LHO aLOG 44264). It's output is all turned off as well.

SQZ pump transmission to SQZT6 dropped to ~20%

In alog45288 we measured 44% transmission from ISCT6 fiber coupler into chamber. Attached a plot showing transmission dropped over two days from Nov 30 to Dec 2. SHG launch shows somewhat constant power going into the fiber coupler while OPO REFL dropped 40% to 23%. Also attached another plot over 20 days. Terry also recovered ISCT alignment so we now have 83% transmission to the end of 5m fiber (alog45871). We've never recovered 40% level of transmission.

locking tonight

Some notes on locking tonight (Rana, Craig, Dan Brown, Terra, Sebastian, Sheila, Hang, TVo, Danny Vander-Hyde)

Violin modes:

• After the TCS preloading during the November vent, we had changes in the violin mode damping settings needed for the ITMs only, which made us wonder if the violin modes are changed by the ring heaters.  
• Today after the ring heater changes we again have some ITM modes for which the damping settings have changed. 
• ITMX MODE 9 (504.1786Hz) we are now using -60 degrees and negative gain
• For ETMX MODE1 (which has never been well damped) we changed from -60degrees to + 60 degrees
• ITMY MODE 7 has been changing, but we haven't found a damping setting yet.

We tried Jenne's new state which turns on all the ASC at the same time, which has worked twice.  We have increased the thresholds used by the convergence checker a lot. 

We have also turned on the OMC DCPD low pass filter.  The OMC guardian can now be used to add and remove the low pass filter while we are locked on DC readout, and to add one additional stage of whitening, although we haven't tested the additional stage of whitening while on DC readout. The low pass is now turned on when we lock the OMC, which will make our dark noise bad enough to add noise to DARM.  This should help us to avoid violin mode problems while we power up, we can either remove the low pass or add the next whitening stage to recover the sensitivty. 

We have had lots of trouble with ALS, it seems like we have fast glitches which might be a problem with the fiber.  We also have the micro seism around 1um/sec and wind gusts up to 40mph, so that is making the locking more difficult.

DRMI locking has continued to be much better with the preloading reduced.

When we acquire DRMI (ISC_LOCK_STATE_N ~100), the PRM is badly yawed.  
We've lost lock tonight during ASC a couple of times, so I took Jenne's new slow route through it this time.
On successful locks tonight, the PRM (PRC1) loop has been railed slowly bringing the PRM into a reasonable place.  Otherwise, our POPAIR18 has been incredibly "dippy", AKA large sideband power swings, often leading to locklosses after acquiring DRMI.
We need to engage PRC1 right after catching DRMI to bring the PRM into a reasonable alignment before going on.

ALS glitches

We have been having locklosses due to the glitches which seem very similar to the ones that happened when we had a laser safety tag hitting the ALS fiber in the HVAC wind.  This seems to have started or gotten much worse on tuesaday.  We looked at fibers in the MSR, and they are still in their protective tubes.  

Does anyone know of work on Tuesday which might have changed something near the ALS fibers?

At the PSL rack, there is still a laser safety tag which is zip tied to the fiber and hanging off of it, causing strain.  I temporarily set this to rest on one of the chassis, but it would be good to remove the tag from the fiber if we can.  

After I touched the fiber the polarization arriving at the end station was wrong.  If looks as though the polarization controller has been in error since Tuesday maintence.  I am not sure what the polarization error means, but it cleared when I turned the box on and hit the reset button. 

preview of omc and omcpi model change for drumhead beacon dither

h1omcpi and h1omc were changed and compiled but not installed (that's for Tuesday).

In h1omcpi, a decimation filter was put between the drumhead mode RMS (64kHz) and shared memory as the omc model works at 16kHz.

Alignment dither oscillators are common for deacon and normal dither. An input matrix is used for selecting the source of demod. This makes it cumbersome to switch between low frequency dither for deacon and high frequency dither for normal dither, but once deacon works it won't be an issue.

WP7995

GV11 open...mostly

Kyle and I spent the afternoon with GV11 slowly opening it and releasing gate o-rings is small incremental motions (powered the motor ~10 times up to 1000 rpm first time and then 500 rpm increments, over two days). We heard a loud noise at the top of the valve on the last incremental stroke and then continued to open the valve, observing the ball screw moving up. The status of the valve did not change from red to yellow on MEDM screen, so we suspect the limit switch broke. Therefore, we didn't want to open the valve fully to avoid utilizing the hard stops. We will investigate on Tuesday.

Prior to opening GV11, we leak checked the RGA manifold and new flanges around CP4's 10" GV. There was some sporadic He signal around the full range gauge area but nothing above 2e-9 Torr. The RGA will be rebaked later and that area will get leak checked again.

RGA was scanning before, during, and after GV11 opened. Will process and post results Tuesday.

We also burped dry N2 into GV12's gate annulus and then fully vented it to discover it is also now leak tight!