• Unlike the green path, it turns out that the viewport is about the only thing that could potentially clip the IR path betwen the ISCTEX periscope and the TMS steering mirror.
• IR beam is more than 2" away from the viewport edge, so we're quite safe.
• We closed the beam diverter, realigned the TMS (because beam diverter tilts the TMS), and adjusted the high power beam dump steering mirror such that the beam goes to the center of the HPBD aperture.

Corey and Filiberto fixed the ground loop problem (separate alog), so we're completely done.

Yesterday's "upgrade" of x1work didn't go so well.  At this point, it is running and appears to be functional for the basic stuff, medm, gds tools, dataviewer, and so on.  There is a possibility that additional packages may need to be restored, please let me know if something doesn't work that used to and I'll work to get it fixed.

SR Crew intending to flash DRMI then handoff to SEI crew around lunch.

LVEA will transition to laser SAFE condition at that time.

Apollo working to install ameristat bib at HAM2, then will pull North door on HAM 6 in order for Gerardo to
install glass and blanks on ports of HAM5/6 septum.

EX - Keita using green light briefly, then de-energizing laser in order to accomodate IR-glasses waiver for Pcal team to work in chamber without green light hazard
EY - RichardM doing some photography work, installing auxiliary power racks (may be at EX as well)

HAM5
Particle Size    Count
[um]                 [ct]
0.3                   0
0.5                   0
0.7                   0
1.0                   0
2.0                   0
5.0                   0

HAM3
Particle Size    Count
[um]                 [ct]
0.3                   0
0.5                   0
0.7                   0
1.0                   0
2.0                   0
5.0                   0

HAM2
Particle Size    Count
[um]                 [ct]
0.3                   0
0.5                   0
0.7                   0
1.0                   0
2.0                   0
5.0                   0

Before starting work just after lunch yesterday, the particle counts were 0 in both HAM 2 and 3!

model restarts logged for Wed 16/Jul/2014
2014_07_16 10:54 h1susetmy
2014_07_16 11:17 h1broadcast0
2014_07_16 11:17 h1dc0
2014_07_16 11:17 h1fw0
2014_07_16 11:17 h1fw1
2014_07_16 11:17 h1nds0
2014_07_16 11:17 h1nds1
2014_07_16 11:20 h1fw0
2014_07_16 11:20 h1fw1
2014_07_16 11:27 h1iopsusey
2014_07_16 11:28 h1iopsusey
2014_07_16 11:30 h1iopsusey
2014_07_16 11:30 h1susetmy
2014_07_16 11:40 h1sustmsy
2014_07_16 11:43 h1broadcast0
2014_07_16 11:43 h1dc0
2014_07_16 11:43 h1fw0
2014_07_16 11:43 h1fw1
2014_07_16 11:43 h1nds0
2014_07_16 11:43 h1nds1

no unexpected restarts. DAQ restarts to support rcg2.9 upgrades at EY.

Two things that were important:

• Better mode matching to the telescope so that the IR beam becomes smaller than the QPDs.
• "Fixed" a crappy binary output cable that goes to the QPDB whitening chassis.

We still need to fix the ground loop problem of TMSX BOSEM, and we still need to look at the IR beam position on the viewport path, but we're basically done with the alignment.

M. Heintze, K. Izumi, T. Sadecki, J. Kissel

After a harrowing few days playing the alignment game, we've accomplished Michelson fringing with the ITM alignments, as measured by a centered beam through the SRM -- and moved the OFI into position such that this fringing is seen through the OFI. The only remaining IFO alignment task is to flash the DRMI with the IMC bypass, and alleviate IM4 bias which is now closer to saturation. Today was a good day. Blow-by-blow below.

Picking up where we left off at lunch (see LHO aLOG 12779), we
- Restored BS alignment to pre-vent value because it's the only optic whose alignment has been preserved from HIFO-XY. (P = +180, Y = -266)
- Re-checked PR3 and PR2 centering, and saw it mis-centered on PR2 (not because anything changed, just we didn't get it perfect before lunch)
- Walked IM2 & IM3 to bring input beam UP in pitch on PR2
- Tweaked IM4 in Yaw -- which is now *very close* to saturation, or will be after pump-down (LL = -93630 [ct] (71% range), UR = +95966 (73% range))
- Once we hit the center of PR2, we needed no further tweaks to PR2 or PR3 or BS -- the beam was centered on ITMX and ITMY and both X-ARM and Y-ARM paths hit SR3 and SR2.
- Blocked ITMY beam, centered X-ARM beam on SR2 and SRM (only small moves needed for SR3 and SR2)
- Unblocked ITMY, steered ITMY a little to get Michelson fringing at and behind SRM. GOOD!
- Saw beam missing OFI by ~300 [urad] of Yaw at SR2 
- While gathering OFI pusher materials, tried to get flashing of SRC with SRM alignment; got close but we were ready to move before we saw flashing. During this exploration, we increased the damping gains on SR3 and SRM to try and reduce motion. They remain high, but no need to keep them that way permanently.
- Moved OFI using pushers -- Front (closest to SRM) ~3/4 [in] (~20 [mm]) in +X, back ~ 3 [mm] in +X (so a slight translation in +X and a twist in -yaw) 
- Moved SRM AR Baffle ~1 [in] (~25 [mm]) in +X direction to center beam through aperture
- Reinstalled SR3 AR Baffle, setting dog-clamps to locations as defined by D1201315.
- As we left the chamber, beam is centered on SRM, at the input to OFI, and into HAM6 septum hole, with fringing visible all the way into HAM6.
WIN.

I restarted the DAQ to clear the 0x2000 status of h1susetmy due to INI file change (2.9 upgrade). This was not a clean DAQ restart. About 50% of the FE models went into a 0xbad DAQ status, which was cleared by restarting the mx streamers. This was complicated by an incorrect start_streamers.sh being in controls search path. The incorrect one is configured for LLO.

A second problem was that both framewriters restarted themselves 5 minutes into the new run, a problem which was not repeated.

The third problem is that h1susetmy had constant CRC errors from h1dc0.

Thinking that perhaps a mismatch of 2.8.4 and 2.9 models at EY was a possible cause of the CRC problem, I recompiled h1iopsusey and h1sustmsy against 2.9. Now both ETMY and TMSY had CRC errors.

The problem was tracked to the ODC channel in the SUS models using the new UINT32 data type. Until we get permission to upgrade the DAQ tp 2.9 we hand edited H1SUSETMY.ini and H1SUSTMSY.ini and changed the one instance of "datatype=7" to "datatype=2". Both models and DAQ were restarted and all are now happy campers.

HAM5 Closeout reading
Particle Size    Count
[um]                 [ct]
0.3                   320
0.5                   120
0.7                   60
1.0                   60
2.0                   40
5.0                   10

HAM4 Closeout reading
Particle Size    Count
[um]                 [ct]
0.3                   50
0.5                   40
0.7                   30
1.0                   20
2.0                   20
5.0                   0

The x1work workstation underwent a package upgrade to allow compiling code with the same packages as the LHO build machine.  This should allow better testing of control room tools on the test stand.  Formerly, the tools would need to be compiled on the LHO build machine and copied to the test stand, now tools should be able to be built directly on the test stand.

Particle Size    Count
[um]                 [ct]
0.3                  260
0.5                  110
0.7                  90
1.0                  40
2.0                  30
5.0                  10

Pretty Dirty.

J. Kissel, K. Izumi, M. Heinzte

Half-way progress report. In summary, after ditching the Jun 26th wall-spot as a reference, we've re-aligned the bypass beam to a slightly modified IMC alignment. We now see beams on the ISS QPD array, as well as the IM4 TRANS QPD, with good SUM values. We've moved the over all beam UP going into the PRC, as expected was needed (though still for an unknown reason). With this alignment, we have a beam centered on PR2 and PR3. We now move on to check the centering on the ITMs, and continue to output arm for OFI alignment check.

Blow-by-blow of this morning's activity:
- Set up temporary IMC TRANS camera, found IMC flashes weren't awesome
- Tweaked MC3 pitch/yaw to get good flashing (P = from -550 to -700 [urad], Y = from -2557 to -2550 [urad])
- Re-aligned bypass beam to IMC trans flashing
- Beam looks good on 2014-06-26 wall spot, but 
    - too low on IM4 TRANS QPD, 
    - doesn't show up on ISS array
    - still too low on PR2 with IM4 P alignment close to its limit
  similar to where things were left yesterday.
- Decided to give up on 2014-06-26 wall spot since its the only figure of merit "correct," 
- Also guess that its not MC3 that's causing bad flashing, but MC1
- Added copy of LP filter from IM4 TRANS QPD SUM to ISS QPD SUM filter bank to better track amount of light on ISS QPD
- Restored MC3 alignment
- Tweaked MC1 alignment to get good flashing on temp. (P = from 1254 to 1100 ; Y = from -2366 to -2400)
- Re-aligned bypass path to IMC TRANS path, found beams on both arriving IM4 TRANS QPD and ISS QPD. Spot now high ~7 [mm] from 2014-06-26 wall spot.
- Walked beam up between IM2 and IM3 (subtracting pitch in IM2, adding pitch to IM3), beam still looks OK going through the IFI 
     (New alignments IM2 and IM3 P = +18000 and +18000; Y = 5154.7 and -2500)
- Now beam is centered on IM4 TRANS QPD and ISS QPD, and shows ~ 30 [ct] and ~ -370 [ct] on their sums, respectively.
- Wall spot is now ~7 [mm] high, but beam is centered on PR2.
- Block MC1 and MC3 with metal shields to prevent IMC flashing 
- Increase laser power to 1 [w], sum on IM4 TRANS QPD and ISS QPD is 100 [ct] and -2000 [ct].
- Draw new spot on wall, marked ast 2014/Jul/16, 7 [mm] above previous spot.
- Checked centering on PR3, looks OK. Break for lunch.


Given that with wall-spot is the only figure of merit out, we deem this new alignment of the mode cleaner and subsequent.  Good!

1. Ground loop check

Sheila and Arnaud checked the ground loop from outside and one of the TMSX BOSEM cables was bad. Nothing was done to fix it yet.

2. Putting Pico collars and kapton washers

Though I asserted to Corey that EX picos have collars, I was wrong. We put the collars on picomotors where possible, but there was two picomotors (M14 PIT and M3 YAW) where there was not enough space. See pictures.

Then we put kapton washers to all picomotors.

3. Relieving HEPI bias by rebalancing TMS

Some change in the behavior of SUS guardian seems to mean that the SUS bias is not restored by requesting "align". Because I and Sheila were both unaware of this, we tried to "confirm" our alignment with the HEPI bias on with slightly wrong ETMX bias (turned out later that it was about 30urad too much), and we couldn't quite align the TMS, but estimated from the distance of the forward-going and back-going beam on one of the HWP that we needed 30 urad more headroom to align it. (So things were consistent in the end.)

Anyway, we ended up having to relieve about 300 urad of TMS bias in PIT by moving PIT balance masses on the TMS.

4. Setting up ISCTEX for realigning IR QPDs

First we tried to use Sheila's setup as is, but it turned out that the beam would get too large inside the TransMon telescope.

We removed the lens in the IR TRANS monitor path on ISCTEX and that made things better. After much iterations, we reasonably aligned the IR beam such that the beam retro-reflects from the ETMX and the beam position on the secondary is on top of the green beam within 2mm or so. The  IR beam diameter coming out of the arm is about 6mm on the secondary, so 2mm is not very small but should be good enough to put the beam on QPDs.

5. Aligning the steering mirrors on TMS

Not surprisingly, the IR beam was very close to one of the green beams on the QPDs.

We found that the beam was totally off on the QPD sled and was not making it to the QPDs, but just moving M14 was good enough to bring the IR beam on both QPDA and QPDB. It's somewhat puzzling that people could not center the QPDs using M14 and M4, but again it's kind of hard to turn the right knob for the right degree of freedom because two mirrors are almost degenerate (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=11897).

Two disappointments were that the beam was bigger than the 3mm QPD (it looks like 4mm or maybe more), and that the IR power seemed to be too small to be useful for centering. The latter was surprising as the OzOptic laser is nominally 10mW, and given the 95% splitter in the path the power on each QPD should be about 10E-3*0.95*0.05*0.5 = 240uW, which doesn't sound terrible.

Anyway, our mission is to bring the IR beam centered on both QPDs within 1mm, and keep the IR path to the ISCTEX at about the center of the clear aperture formed by the chamber/viewport/table enclosure, to make sure that the pico mirrors can take care of the fine centering job without destroying the in-air IR path. We will center both of the QPDs using M14 (pico) and M15 (manual) as good as can be done by eyeballing tomorrow.