Below are the trends from the past 26 days as I have been on holiday and then out sick for a week. 

A bit of a windy night made locking tough for commissioners.  I worked on other items (alarm handler work, HAM5ISI trips, etc.).

• 0:27 Rick/crew out from H2 PSL (for ISS PD Array work)
• 0:10 Return from Y-arm tumbleweed inventory (John, Bubba)

The Commissioners will run the HWS measurement when they leave.  

[Jenne, Sheila, Den, Hang, Keita]

We started the day by phasing the REFL WFS, both A and B, in both 9 and 45.  In particular, we knew that the 45 MHz phasing was weird.  Hang will post a reply with our detailed procedure.

We also reverted the AS 36 A&B demod phases to the values that Sheila had found on Sept 1 (alog 21083). 

With this new phasing, we started trying to close WFS loops. 

• First, we used the usual AS B 36 I input matrix element for MICH pit and yaw.  No other changes to MICH.
• Then we used the usual difference between REFL 9 I A&B for INP1 pit and yaw.  No other changes to INP1.
• Next up was PRC2.  We removed the REFL45 input matrix elements from both pitch and yaw, but left the usual sum of REFL 9 I A&B.  PRC2 could certainly use speeding up, but we tried once by removing the -14dB in FM4 for both pitch and yaw, and then engaging the loops, but we lost lock immediately.  More work for this loop in the future.
• We closed PRC1 with no changes to the input matrix.
• We didn't close SRC1, but we found an oddity that AS A 36 I is the dominant error signal for Pitch if we move either SRM or SR2, and AS B 36 I is the dominant signal for Yaw if we move either SRM or SR2.  Seems a little weird, but was true even after we re-double-checked our AS 36 A phasing, and was true for motion of 2 different optics, so it seems real.

We captured the state of the ASC in a snapshot (saved in the same folder as the SDF's snap files), and then reverted everything to the down.snap file so that noise hunting work can happen tonight.

All of today's work was done in DRMI-only, since the wind was much too high to hold the arms with ALS.  So, we'll have to re-visit these phasings, but hopefully they'll only be small tweaks in full lock.

We have not yet closed the loop on the new AS 90 centering loops, since we got a bit confused earlier in the day when (it turns out) there wasn't any light on the AS WFS.  Keita has set gains and phases to match the current DC centering loop, so we should be able to just change the input matrix elements (same values) over to the AS 90 column.

Overall a good day, but we need to keep pushing forward.

Checked the PSL Crystal & Diod Chillers.

• Crystal Chiller required 175mL of water.
• Diode Chiller did not require water.

FAMIS #4138 is now closed.

model restarts logged for Wed 17/Feb/2016
2016_02_17 14:20 h1broadcast0
2016_02_17 14:20 h1dc0
2016_02_17 14:20 h1nds0
2016_02_17 14:20 h1nds1
2016_02_17 14:21 h1dc0
2016_02_17 14:21 h1nds0
2016_02_17 14:22 h1nds1
2016_02_17 14:22 h1tw1
2016_02_17 14:24 h1broadcast0

Unexpected crash of h1dc0 followed by in a bad DAQ restart.

Took about 3 minutes with LLCV bypass valve open 1/2 turn.

Next CP3 manual over fill is February 20 before 23:59 utc.

[Cao, Ellie, Dave O, Aidan, Kiwamu, Nutsinee]

To whoever will be the last to leave control room after commisioning tonight, we would like to run a script to test whether the beam on the Hartmann wavefront sensor is the beam coming from the HR surface of ITMY, here are the steps:

1. Turn off SR3 Cage Servo ,make sure that all mirrors are in ALIGNED state and set SUS for full lock.

2. Run a script named ringheaterITMY.py by entering "python ringheaterITMY.py" on the terminal (the terminal should have been already visible on the screen with the command).

         This script will change the offset values:

          SUS-SR3_M1_OPTICALIGN_P_OFFSET from 575.0 to 1574.8

          SUS-SR3_M1_OPTICALIGN_Y_OFFSET from -153.6 to  -336.2

        We believe the beam on HWS at this position is the beam reflected from the HR surface of ITMY.

       The script then will turn on the upper and lower ring heaters of ITMY to 1 W for 30 minutes and then turn off.  This is the test for confirming the origin of beam spot on HWS.

The script is saved in folder HWSYAlignment folder in Home folder.

All relevant windows should be readily visible on desktop opsws3 10.20.0.133

J. Kissel, J. Warner

Excited to use the buried STS (see LHO aLOG 25574), Jim had switched over to using the recently-moved-to-20 [m]-from-the-building STS for sensor correction (coupled with some other new configuration changes he's trying out; see LHO aLOG 25623). He was getting poor results when comparing internal vs external sensor correction use, so I've compared the times yesterday when we had great coherence at 10 [m] and 0-5 mph winds against today, when the STS is at 20 [m] away and there are consistent 25-30 mph winds.

The message: both the internal and external ASDs, in X, Y, and Z, are comparable in amplitude and yet incoherent at this location and these 25-30 mph wind speeds. That means the buried STS is not so promising for sensor correction use at this level of wind.

One can compare this to results originally presented by Robert at the 40 [m] location in ~15 mph winds; see LHO aLOG 19210. 

You'll notice that in both of these data sets, the contrast in amplitude difference between windy and not windy is "better" in the X DOF (perpendicular to the arm) than in the Y DOF (parallel with the arm; what we're trying to improve). 

We shall continue to take a smattering of data points to gather statistics at all wind speeds in this location.

For the impatient and saddened -- recall that we have or will employ three different methods to attack wind at EY:
(1) This buried, external STS [in the testing phase now]
(2) A new BRS [scheduled for delivery in mid-March]
(3) A wind screen system [working on getting funding] 
We're trying all three just in case one actually works. Let's hope one does!

In December, I suggested a design for a new sensor correction filter for LHO. For most of the last month the end station ISI's have been running running this for a while, but I haven't had a good opportunity to do any comparisons of the interferometers performance. For now, I'll summarize the changes to the end station's configuration. During O1, we used 90 or 45mhz blends on St1 X&Y (depending on microseism) and the .46hz sensor correction (stolen from LLO) from the ground STS to St1 CPSs. For a good portion of the last month, I've been running the end station ISIs with my useism sensor correction to St1 and I moved the .46hz sensor correction to St2. I think that this configuration has allowed us to use the 90mhz blends with higher microseism, but I still haven't come up with a measurement to show that.

My first two attached plots show the difference in X between these two configurations. The first plot is the St1 perfromance (T240's blue and red) and  ground STS (pink and light blue). Dashed is with the "01" configuration, solid is with the current configuration. As expected the current performance loses some around .5hz, but  gains a factor of 2-ish suppressio of the microseism. The second plot shows the St2 GS13s and ground. Green is the current configuration, brown is the O1 configuration. The current configuration (useism senscor on st1, and st1-2 senscor) does better most places except for some gain peaking around 50-60mhz. It would be useful to compare the current configuration to performance with the 45mhz blends, which suppress the microseism better, but have more gain peaking below 100mhz and are adversely affected by wind.

The last plot shows the suppression (the transfer function from the ground STS to the St2 GS13s) of the 01(dashed brown)  and current (solid blue) configuration. The story is the same, the current configuration does a better job between .1 and ~1 hz, a bit worse below .1 hz.

I have more configuration stuff to log, but I'm out of time for the moment. But HAM1 has inertial isolation, and I've added St1-2 FF in Z to the BSCs.

Heliax cable for the 71MHz CPS Sync was pulled in this morning. Cable goes from the CER to SUS rack H1:SUS-R3 (next to HAM4). Waiting on N bulkhead connectors for the 2U N patch panel.

The new EOM/AOM driver field cables (2 DB9 and 2 DB25) were pulled from the CER ISC racks to the PSL racks in the LVEA. Cables still need to be routed inside the PSL enclosure.

For now, we left the old temporary field cables connected. These will need to be pulled out of the cable trays later on.

Here is the summary of the working SVN directories we have at LHO and the number of locally modified files in them pending commits to the repostitory.

* all working directories are under /ligo/svncommon/ except for user apps which is in /opt/rtcds/userapps

[Cao, Ellie, Dave O, Aidan, Nutsinee, Kiwamu]

We scanned SR3 last night for 7:50:00 (LHO alog 25600). We use Aidan's MATLAB script from LLO alog 9368 to identify beam spots on the HWSY.  The three plots below are

1)HWSY_refl_map_early.jpeg  showing the averaged intensity early in the scan

2) HWSY_refl_map_lin.jpeg showing the averaged intensity after full scan with linear intensity colormap

3) HWSY_refl_map_log.jpeg showing the avegaed intensity after full scan with log intensity color map

The spots look very different from that recorded at LLO as expected due to the wrong optics install in vacuum. The images of full scan show four beam spots. We first checked the source of two upper bright spots by misaligning the ITMY. There were no change in the bright beam spot observed on the HWSY. Therefore, these must have come from the 2 surfaces of the compensation plate (CP). The beam correponding to the left bright spot is currently centered on the camera.

We then checked the bright spot immediately underneath the current position of pitch and yaw (which is at the center of the plot). By misaligning the ITMY, we saw the beam spot on the camera move. By further adjusting the pitch and yaw of ITMY, we could see the beam spot disappear. Therefore, this beam must have come from one of the surface of the ITMY.  The high intensity shown on SR3 scanning plot gives a strong indication that this beam comes from the HR surface of ITMY.

We will center this beam onto HWS this afternoon by walking the SR3 and periscope mirrors this afternoon. We are also planning to to run a definitive test tonight to confirm the source of this beam spot and see how far off we are from centering the beam by turning  the ring heater on with the HWS running.

I've added all the filter gains to the MEDM screen as well so they can be clearly read (in-line after the corresponding button for each filter screen). These represent the steady-state diopters per Watt value for each actuator.

Richard put in the fix for TMSX satellite box and the oscillations are gone.

Had a couple of random HAM5 ISI/SRM_M1 watchdog trips.  For both watchdog trips, it looks like HAM5ISI is first.  The trips happened during two different states of working on H1.

1)  At end of TJs shift when there was a lockloss from DRMI.  The GS13s & Actuators both hit their limits.  NOTE:  on this one, SR3 was quite a bit off in yaw!

2)  While aligning H1, HAM5 tripped in a similar way.  NOTE:  No issue with SR3 here!

For both cases, all the M1 OSEM RMS values start increasing (not enough to trip the WD), but it's interesting to see them all ramp up.

For the first case, Sheila made a change to Guardian to make sure we look at when DRMI drops out of lock.  Still not really sure what caused case #2.

Received an FMCS Air Handler HIGH RED alarm.  This evening.  I've acknowledged it, and it will probably stay in the RED state until addressed (if this is a new running state, we should update the alarm handler).

This might be correlated with John turning off heaters on Tuesday, but not sure.

Will send an email to John/Bubba.

I filled the PSL diode chiller with 350ml of water.  Attached is a 30 day plot showing where the diode chilller was filled on Feb 4th, and then the alarm level increasing starting around Feb 13th.