A set of matlab transfer functions has been ran on the TMSX this afternoon after BSC9 was closed out, and while the ISI was damped. The pitch degree of freedom shows some excess noise between 0.7Hz and 3Hz, which is something I was not expecting to see since the measurement after the last work accomplished on TMSX was clean.

It might be related to some excess motion at the time of the measurement during the afternoon, which I will check by running undamped and damped TFs overnight in a quiter environment. We will see how repeatable the measurement is tomorrow morning.

It might also be the position of the cables that could have changed by themselves because of their weight. Or maybe some work that I'm not aware of that was done after the last measurement taken. In those cases we would probably need to physically check what is going on.

Results attached are described below :

(1) Comparison between the model and last TMSX TF

(2) Comparison between TMSX after the work done on Nov 20th (Orange trace), after the last time work has been done on Nov 22nd (black trace), and today (pink trace).

See the 5th page of (1) and (2) for the pitch dof

I am leaving the IMC locked for the night in order to see its stability. The ASC loops are all engaged.

It must be rock-solid because we fixed the EOM !!

An auto-locking script is locally running on opsws4. The script itself resides in /opt/rtcds/userapps/release/ioo/h1/scripts/imc/sballmer/ and it is called MClockwatch.

The PSL enclosure is now back in science mode. PMC/FSS/ISS are running fine.

Hugh noticed that some HEPI ITMY slow channels were not correct in the DAQ. I did some investigation and found:

Of the slow channels (datarate=16) in H1ISIITMY.ini :

channels associated with the FEC were correct

channels associated with Filter Modules were correct

other slow channels were incorrect, either showing zero or other data (like channel hopping)

Fast channels appear to be OK (within the limited sample I used)

The problem is not seen with HEPI BS or ETMX. Looking at the models they all look identical.

Reboot/Restarts:

I first restarted h1hpiitmy. Then tried restarting all models on h1seib1. Then tried a restart of the mx-streamers. Then recompiled and reinstalled the h1hpiitmy model and restarted it, followed by a DAQ restart (DAQ status was good, so this should have been unnecessary). All to no avail.

The only thing I haven't done is reboot the computer.

It appears this problem appeared when we upgraded to RCG2.8 on Tue 12 November.

CP3 alarmed, appears to have been filled
Cleaning at end Y
Apollo torqueing bolts at end X
Corner Station chiller 2 tripped, restarted by Ski

08:52 Joe and Gerardo swapping PSL light pipe shutter
09:05 Filiberto to look at end X transmon cabling
09:39 Joe and Gerardo done swapping PSL light pipe shutter
10:02 Sheila removing beam block from PSL table
10:34 Hugh reports that the corner station HEPI pumps tripped off early this morning
10:51 Dave, Kiwamu restarting H1 LSC model, DAQ restart
10:56 DAQ restart
11:16 Hugh modifying corner station HEPI pump controller (WP 4325)
11:19 Dave restarting all models on H1 ISC EY
13:02 Thomas V. working on ITMX optical lever enclosure/bellows
13:08 Safety inspection walking through the LVEA
13:28 Gerardo to LVEA to find Thomas V.
14:16 Arnaud running transfer functions on TMSX
14:17 Apollo removed dome and north door from BSC 10 (WP 4326)
15:22 Jeff K., Sheila and Arnaud purposely tripping chamber watchdogs
15:23 Hugh done modifying corner station HEPI pump controller (WP 4325)
15:36 Gerardo and Thomas V. done with optical lever enclosure/bellows

Last night the power watchdog on the PSL tripped again.  I turned the last back on this morning after the shutter was installed. 

Note:  this morning I transitioned to science mode, then stefan and I reentered to make a measurement of the modulation depth with the OSA.  When I transitioned back to commisioning mode I forgot to turn the AC on, so there was probably quite a temperature fluctuation.  Now the psl is in commisioning mode.

Since the PSL is at least working reasonably now I updated safe.snaps for the iss, fss, and pmc. 

Kyle, Gerardo 

Replaced (2) each 1 1/2" check valves, (2) each  3/4" check valves, (2) each exhaust air valves + actuators, left and right tower desiccant (175lbs/tower 1/8" alumina) and the two nearest downstream filter elements.  The (2) large air valves which supply the towers during the "drying" cycle are also nearly wore out and will need replacing at the next service interval. 

Kyle, John 

As alumina dust had been generated and had been visible in the 1st downstream filter element, we made rudimentary particulate measurements from the 80 psi air (before 1 psi regulator) sampled between filter stages 3 and 4.  

For comparison, we routed nitrogen from a UHP N2 bottle+regulator via 8' of 1/2" poly tube through a 0-5 GPM (liquid) rotameter which exausted into one end of a flow box.  A particle counter was placed inside of the flow box near the opposite end.  

2 GPM indicated flow    Bottled UHP N2      sampled air 
                                     260,000 0.3u        45,000 0.3u 
                                       17,000 0.5u        12,000 0.5u 
 
3 GPM indicated flow    750,000 0.3u        50,000 0.3u 
                                       23,000 0.5u        13,000 0.5u 

30 minutes after routing the purge air supply to the LVEA Class 100 manifolds I moved the flow box apparatus to the XBM purge air connection and measured: 
 
0.8 GPM indicated flow        200 0.3u 
                                             0.0 0.5u

Saw the corner station pump output at zero with max drive from controller.  This condition usually indicates a level trip.  At Pump Stations on mezzanine, indications confirm.  Plus when I attempted to restart, it tripped again from fluid level so I conclude it was a level trip fault.  I lowered the trip point to compensate.  There is only about 3/4" more this can be done.  Why...colder temps? Nah, likely a pretty small effect, air bubbles working there way out?  Probably some of that going on; if it comes out of the LVEA plumbing, it can be released in the reservoir tank.  Leaks?! There are some minor leaks from two of the pumps but these are a drip or two a day kinda leaks, certainly contribute though.  Bottom, line, monitor the levels, clean up the leaks, fix the leaks, add fluid as needed.

I took the opportunity of the shut down to hardwire the FWD switch on the PS controller.  This is already the case at the End Stations.  Consequences: 1) After a shut down, there will be no need to open the panel to restart unless there is a fault to acknowledge on the controller.  This is good because access to the panel requires electrical checkout/approval from McCarthy or having McCarthy do it.  2) Restart will be abrupt if it is not brought up slowly (manually).  This could be bad as the HEPI may shake things around so please understand the process when you restart the system after shutdown.

The dome and door bolts are installed and tightend at BSC 9.
Miscellaneous rigging, tools, o-ring protectors etc. was removed from E X and returned to corner/E Y, as needed.
The north door and dome are removed from BSC 10.
We returned the CPB jigs back to the corner station from E Y. 

In the aLIGO era, folks working at the upper level of BSCs have garbed on the E-module and then entered the Chamber Cleanroom. With the cleanrooms, E-module, etc. in the BSC10 configuration, there is no easy/acceptable way to access the E-module. If you need to do ANY cleanroom work (upper OR lower level),turn right as you come through the Change Room man-door, find the Lower Level Garbing/Staging Room and "bunny-up" there. If you need to work on the upper level or at the spool, pass through the Chamber Cleanroom to access the Spiral Staircase or the CPB Cleanroom. Avoid walking through the Test Stand Cleanroom. If you want to access the far side of the beamtube, there is no need to garb up: just turn left as you come through the man-door and follow the wall around.

I modified the forton files for HAM2 ans HAM3 ISI so the filter locations, and order would match the latest SEI directives. 

I attached a picture of HAM3-ISI blend filters, after updating the foton files. Foton files are attached too.

Kiwamu, Stefan

We put the existing initial alignment system in the h1asc model into its own library part.the files are in /opt/rtcds/userapps/release/asc/common/models :

IAL_LOCKIN.mdl

IAL_MASTER.mdl
 

SEI macro substitution files were created for: HEPI-ETMX and HEPI ITMX - SVN r6548

The SITEMAP.adl was updated accordingly - SVN r6549

I turned ETMX-ISI back on today, to make sure that the recent closeout activity did not impact its functionality.

It is now running under the following configuration:
- Damping
- T100mHz_NO.44 blend on Stage 1
- 250mHz blend on Stage 2
- Level 2 Isolation loops

Apollo asked me to lock HEPI so they could finish torquing the dome on BSC9, so this morning ~8am I went to the end station. Did not use the IPS because DI's are still on the chamber, so I was probably more disruptive than normal, but Apollo said they would probably have to walk on the cross-beams anyway. Apollo is done now, so we will unlock when needed or convenient. This and HAM1 should be the only HEPI's in HIFO-X chain that are locked now.

(Joe, Gerardo)

PSL light pipe and shutter were removed from the chamber side (HAM01), the main PSL beam vieport was exposed to apply FC on it.  FC application (Joe used a small bottle) was finished by 4:10 PM yesterday, to protect the viewport we attached the old vieport adaptor with 3 screws to the viewport, and covered the 3" center hole with aluminum foil.
Work will continue today.

J. Kissel, T. Vo

Because of the recent resonant features seen in ISI-ITMX that seemed to have been fixed by a simple lock and unlock of the ITMX Arm Cavity Baffle (see LHO aLOG 8632), I asked "has anyone ever taken B&K hammer transfer functions of the ACB?" The answer was a resoundingly loud "no" (I am Jack's complete lack of surprise). Me and my big mouth volunteered to do it, and there was a tiny window of opportunity before Thomas cleaned up the chamber, so Thomas and I pioneered the first B&K measurements of the ITM ACB. Details of the measurement setup and execution below.

Again, I don't know how to properly export the data (as indicated in LHO aLOG 8654), so you'll have to be patient regarding the results. Note that obtaining official plots of the results should not in any way be considered as a hold-up for chamber close out.

Of course, after taking the measurements and cleaning up the chamber -- because we *touched* the baffle -- we had Sebastien run a quick set of ISI-ITMX transfer functions, and it informed us we're not-at-all done battling this bumbling oaf of a baffle (see LHO aLOG 8653). This should be considered a hold-up for chamber close out. Round three, first thing tomorrow!

-----------
Details:
We took two distinct measurements: 
(1) With the accelerometer on the suspended baffle itself, using a unused slotted bolt hole in the inside middle, closest to the ITM HR surface. This test was just a shot in the dark, to see if we could get a nice driven transfer function of the suspended stage, since there have been no prior attempts with this generation of the ACB baffle. At first glance from the B&K software plots, it looks like a complete mess, so it will most likely either be a completely confusing / useless or completely depressing result.

DSCN0206.jpg (or pg 3 of the .pdf) shows a picture of the accelerometer from inside the baffle looking out back toward ITMX. As is (hopefully) resolvable in the picture, ACC +X = ITMX -L, ACC +Y = ITMX -T, ACC +Z = ITMX +V. The Y impact was on the (ITMX) +T face, bottom corner, closest to the ITM, in the (ITMX) -T direction. The X impact was along the bottom edge of the (ITMX) -L face, in the +L direction.

(2) With the accelerometer on the bottom of the support structure's tube (shown in DSCN0209.jpg). One can't see it in the picture, but the accelerometers axes were aligned with the global IFO's axes, such that ACC +X = Points down X arm towards ETMX, ACC +Y = Points down the Y Arm towards ETMY, and ACC +Z = Points up with local gravity (the same as ITMX's +V). The X & Y impacts were made towards the bottom of the outer, support structure, "eddy current damping 8 dia," tube (D1002564, of the assembly D1200275). Man, that thing rung like a bell when Thomas whacked it...

The files live on the B&K laptop only, in
C:Users\ligo\Desktop\SUS Hammer Test\ITMX\BandK\
and are called
(1x) SimpleHammerDisplay3-ArmCavityBaffleBaffle-ISIfloating-SuspendedElements_Ximpact.pls
(1y) SimpleHammerDisplay3-ArmCavityBaffleBaffle-ISIfloating-SuspendedElements_Yimpact.pls
(2x) SimpleHammerDisplay3-ArmCavityBaffleBaffle-ISIfloating-StructuralElements_Ximpact.pls
(2y) SimpleHammerDisplay3-ArmCavityBaffleBaffle-ISIfloating-StructuralElements_Yimpact.pls

J. Kissel, C. Vorvick

Calum and Betsy installed the new PR3 baffles (D1300957) yesterday (see LHO aLOG 8619), but only roughed in their alignment with respect to the optic / prisms / wires. Today Cheryl and I went into HAM2, and I aligned the baffles to-the-best-of-my-ability, by-eye, and then tool tightened them to PR3 HLTS structure. My left-right metric was "just covering the edge of the bevel on the optic with the straight portion of the baffles" and my up-down metric was having the "bottom curves of the baffles following the curvature / bevel of the lower half of the optic."  It was certainly a ball-park activity, given that the goodness of alignment depends heavily on one's angle, orientation, and height of viewing. From most face-on views, however, the baffle looks to be baffling the wires and not clipping the optic.

I took many pictures, but did not find out until later that the memory card on the camera was full, so the pictures were not being stored and lost. FFFFUUUUDDDGGEEEE. 
Cheryl, Calum, Betsy, and Kate have graciously volunteered to retake pictures tomorrow before / after they pull of the first contact on all the optics.

We also took B&K hammer transfer functions after securing the baffles (with PR3 freely suspended, and the ISI Locked, and probably with me leaning on the table). I placed the accelerometer in the exact same location and configuration as in LHO aLOG 6014, (4th picture attached) with ACC +X = PR3 -L, ACC +Y = PR3 -T, and ACC +Z = PR3 +V, in the upper left corner of the cage on the HR face, "front" of the cage. The X impacts with the hammer were just below the accelerometer, on the HR face. The Y impacts were on that same strut / corner, at the same height as the accelerometer, on the -T face of the cage, in the +T direction. Comparing these results with the previous results taken before the baffles were installed -- by-eye they look roughly equivalent. The resident LHO expert of post-processing the data is off to LLO for a few days, so we'll post a comparison next week (or I can ask Calum / Stuart tomorrow, we'll see.)

For now, the saved templates live only on the laptop, and live in
C:\Users\ligo\Desktop\SUS Hammer Test\PR3
and are called
SimpleHammerDisplay3-PR3Baffle-ISIlocked-Ximpact.pls
SimpleHammerDisplay3-PR3Baffle-ISIlocked-Yimpact.pls

(Alexa, Sheila)

I am still puzzled by some of the mode matching measurements I took of ISCTEY. I had attemped to compare the accuracy of the Mode Master, Nanoscan, and Knife edge. They seem to approximately agree, but it's hard to say which is most accurate.

Regardless...I examined the beam profile exiting the table enclosure with all the lenses in place using the Mode Master. Refering to D1100607-v13, I found the optimal placement of the telescope to be: ALS-L6 13.5 inches from ALS-M9, ALS-L7 6 inches from ALS-M10. With an "a la mode" script, I determined the mode matching overlap with the TransMon secondary mirror to be 87% for the horizontal profile and 98.6% for the vertical profile. This overlap was computed with a 2.2mm waist at 3.5m from ALS-M11. The waist size and location was determined via T1200200-v1, D0902163, D1201457 as done in the ISCTEX MM alog with a correction of 4ft for the panel location change between EX and EY.

I have attached the scripts and MM snap shot. Note: the first matlab script is just the profile taken by the MM after the telescope, along with the overlap computation. The second script contains the full profile of ISCTEY, which is where some of my confusion persists.