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.

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.

Rolf, Jamie, Jonathan, Jeff, Dave

We built h1susetmy against the latest branch-2.9 RCG. Initially we had compile errors, which we tracked down the ODC_CHAN.mdl file (we backed up that file and reverted from svn).

Running both the front end and the CSS diagnostics, we tested them in finding differences between the running configuration and the snap file. Several items were observed and have been resolved. Tomorrow morning we will determine the set of monitored channels (those not being controlled by guardian) for a quad suspension.

ETMY status for tonight:

• The suspension is being controlled correctly (can be damped, aligned).
• The DAQ data from SUS-ETMY is most probably bad until we restart the DAQ (please restart DAQ if data is needed)
• All RCG pointers have been left in the branch-2.9 configuration, please do not compile any FE models overnight.

Today, Travis and I worked on aligning the main chain of the ITMy QUAD to IAS tolerances.  We first tackled some coarse yaw, then used pushers to push the structure in the +x direction to fix a ~3mm error in the lateral position of the optic.  (Some of this error was due to misplacement the first time we set this QUAD on this ISI.)  We then continued on pitch and more yaw and have finished the day with the optic within tolerance in position and pointing.  We will start transfer functions to check for the suspension health, but will likely hand off to SR3 output alignment checks with the PSL beam before continuing on with this QUAD.  (We have not touched the reaction chain yet, other than to clamp it out of the way of the main chain.)