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

9:00 MattH, JeffK, Kiwamu to LVEA to work on alignments. Out at 12:00, up to PR3
9:15 Nathan to Optics lab
9:15 Betsy to BSC1/LVEA
11:00 JeffB to LVEA
13:30 MattH, JeffK, Betsy, Travis to lvea to work on alignments
14:00 RickS to H2 PSL looking for targets
14:30 Gerardo to LVEA for viewport survey, out at 15:30
16:00 RickS, MikeV, and students heading to EX

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.

The Hanford summary pages (which archive useful trends for most subsystems, some GW search results, and growing) are now linked on the Advanced LIGO Hanford Observatory CDS website: https://lhocds.ligo-wa.caltech.edu/

These will serve to replace the old S6 automated FOMs. 

Suggestions, questions, and feedback welcome! Please send to Duncan Macleod (duncan.macleod@ligo.org) and CC detchar (detchar@ligo.org).

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!

ISS was unable to relock by itself this morning. So I changed the offset from -1.91 to -1.82 V. This fixed the issue. The diffraction now stays at 9% and auto-locker works fine.

Betsy, Travis, some Rich

While fighting to find the shorts in the ESD cable chain on the ITMy reaction chain, we discovered that the "pin 1" and "pin 5"  (or lower right and lower left) portions of the gold coating mask are shorted together via the metal suspension loop that runs along the underside of the optic.  My understanding is that this CP (CP-05) was reworked in order to reuse the mass with the proper wedge orientation.  Indeed, when I went over and looked at the ITMx CP (CP-01), I found it looks different since it was a newer model, not a rework.  Pictures were difficult to use to understand this shorting, so we instead defaulted to the second opinion of Rich Abbott who is visiting us this week.  He was in complete agreement of the gold shorting route across the suspension wires for the the lower left and right QUADs of the CP.

While laying on our backs in BSC1 staring at the CP gold coating short, we attempted to do a scrape test to see if we could scrape off some of the unused gold from one of the unused fingers on the under side of the optic (there due to the rework).  This seemed to kind of work.

While we chewed on this fix, I redirected RIch to the ESD 5-pin coax cable that plugs into the in-vac side of the feedthru on the chamber.  This has continued to be a problematic joint for us.  Earlier in the morning, just before we discovered the gold coating issue, we had one of the 5 cables (I think pin 2??) pull out very easily from the back of this connector, leaving the recepticle on the connector and the pin on the cable.  We were able to wiggle the pin back into place in the connector receptical, reseat the connector at the feedthru, and see that all 5 pins had continuity with Fil.  Rich points out that a solder joint is broken on this cable, and he (like us) is uneasy with the fact that it could pull out at any time - maybe why we've see it pass sometimes and fail at others over the last few days of short hunting.  Note, this ESD cable has been in chamber since the begining of install - it was installed in BSC8 prior to moving the entire SUS/ISI to BSC1.  This connector is well used and has an "old" history.

So, we've left the chamber to see what we should do with both of these problems.

Rolf, Jamie, Jonathan, Jim, Dave.

we are continuing to test RCG2.9 with h1susetmy initially. This model and/or DAQ will be restarted to support this work.

Input/Output HAM optic alignment ongoing, starting over with alignments, going back to ITMX
Extra debris dams going into HAM4
Beam splitter baffle starting
TMSX work ongoing
Rai, et. al doing dust test on RGA before going to EY
Richard working on SEI coildrivers at EY

In the afternoon yesterday, we hopped into HAM5 to look for beams. 

Particle counts outside of the chamber in the cleanroom while the C3 cover was still on:

0.3um  10

Rest, 0

Counts inside chamber:

0.3um  160

0.5um  70

1.0um  50

model restarts logged for Tue 15/Jul/2014
2014_07_15 10:35 h1susetmy
2014_07_15 10:38 h1susetmy
2014_07_15 10:46 h1susetmy
2014_07_15 12:34 h1susetmy
2014_07_15 12:37 h1susetmy
2014_07_15 12:59 h1fw1

ETMY restarts for 2.9 testing. Single unexpected restart of h1fw1.

We entered HAM3 (East door) briefly midday yesterday to check for beam pointing.  During one of the times, the counts were:

0.3um  110

0.5um  30

1.0um  10

(Note, these counts are taken after Apollo (Calum, etal) put an ameristate "bib" around the HAM3 West door.

Kiwamu, Matt, Arnaud, Travis, Betsy

Today, we attempted to look at the alignment of the ITMy to the SR optics.  We immediately could find no beam at all at SR3 (not even from ITMx which had just been aligned yesterday).  So we moved back through HAM3 and 2 and discovered the bypass beam needed realignment again.  Recall that yesterday, the crew also found this path to need realignment.  Today however, we made the assumption that the ground loop hunt at MC3 possibly bumped the bypass mirrors which are inches from the cables being worked on.  After attempting to walk the 2 bypass mirrors a long ways to restore pointing on both the IM TRANS PD on the very SE corner of the table and the MC wall mark (off by ~10mm), we decided something worse must be wrong.  (Hitting both of these marks should assure that the bypass beam is lined up on top of the MC flashing path.)  We paused to check the MC flashing (lowered the PSL power back to 200mW) and then used the flashing beam lever arm between IM1 and 2 to co-align the beams.  We again used the bypass mirrors and tweeked up this alignment.  However, the beam was still off of the IM PD by ~1 cm low in pitch, and the beam was ~2 inches low going into the PR2 baffle.  At this point we decided to do more forensics in the control room.  What we can confirm:

1) The MC flashes with the MC1-3 biases set many many days ago.  This means
- The pointing from the PSL is good.
- The plane of HAM2 and HAM3 have not changed.

2) HEPI checks of level of HAM2 confirm the above.  (Although Hugh mentioned seeing a minor ~3uR rotation of the table.)

3) Sensor spectra checks of the HAUX IM1, IM2, IM3, and IM4 show healthy suspensions wrt. previous reference plots.

4) IM1 and IM2 pointing look healthy as the beam seems ~centered going in and out of the FI.

5) Biases of all 4 IMs had not been changed since the "good" alignment from yesterday.

6) Trends of IM sensors show the jostling of the ground loop hunt on HAM2 at 2pm, but no overall changes to their signal baseline.

7) IM4 ran out of range in pitch to correct the still low beam on the IM PD and PR2.

8) The misalignment happened sometime after we went laser safe at 1:20pm on Monday and today at ~11am when we unshuttered the PSL beam which was still at 1W from Monday - the IM PD never showed signal from the 1W after opening the shutter today.

Tomorrow we plan to start again, doing a more careful alignment of the bypass beam with the MC flashing beam since it was obviously difficult over the short 1m lever arm in-chamber with an IR card.  We will then attempt to realign to HAM4 using IM3 and IM4 if still needed.