New 5-channel 4.5" CF ESD feedthrough flanges leak! -> Douglas D., Justin B. and I tested (2) each of these, one of which was to be installed and BSC8 today prior to pumping down the YBM.  Helium responses were large and fast but we did not record the actual peak numbers as we were in a "pass/fail" mindset-these definitely FAIL!  We may repeat test tomorrow and record leak rates for the record.

Travis, Jason and I spent most of the day down at EY struggling with the mechanics of ETMy as the chains are not well set in yaw and are proving a pain in the a$$ to align.  In fact, we had to pull the reaction chain away from the main (via EQ stops) just to work on the main without reaction pushing on main.  After ~5 iterations of Top Stage blade tip alignment, we finally ended the day with the main chain hanging at some 500urad out.  Jason reports that this is roughly where we started this morning...

We also fought a differential pitch between the ERM and the PenRe above it - due to the loop.  We attempted to move the loop along the barrel a bit to see if that would help.  It didn't appear to, so that's when we opted to clamp it off away from the main anyways.

Pictures are in ResourceSpace:

https://ligoimages.mit.edu/?c=961

Original picture names describe what area the picture is capturing.

I've updated H2 SUS ITMY's compensation filters such that they contain all compensation for all stage's electronics. The coil driver compensation filters (found in the COILOUTF banks) are arranged in filter modules according to T1100507. The SatAmp whitening compensation filters (found in the OSEMINF) remain in FM1. 

I've also removed any old, erroneous, and/or unused filters in these banks. Note that the "to_nm" filter in FM5 of the OSEMINF banks is a calibration filter for the OSEM sensors (just a gain of ~40 nm/ct), but is untested and should not yet be used.

Details
----------------

The new filter file, 

/opt/rtcds/lho/h2/chans/H2SUSITMY.txt

has been copied over to the userapps repo,

/opt/rtcds/lho/h2/userapps/release/sus/h2/filterfiles/


Because the updated coil driver compensation scheme involves different filter modules than the previous scheme, I've also updated the burt snapshot files,

/opt/rtcds/lho/h2/userapps/release/sus/h2/burtfiles/h2susitmy_damped.snap
/opt/rtcds/lho/h2/userapps/release/sus/h2/burtfiles/h2susitmy_safe.snap

capturing them from the autoBurt.req file found in 

/opt/rtcds/lho/h2/target/h2susitmy/h2susitmyepics/

Witness plates, which are 4" diam. silicon wafers, were installed in BSC8 and nearby beam tubes.  The first two attached images show the installation as of Feb. 1, and as installed on Feb. 2.  Locations match, but the second images includes the detail, that may or may not effect the results, that a witness plate was broken and replaced in one location.

Location for witness plates were chosen to give information about migration of particulate from beam tubes to the BSC8 chamber.

Additionally, I chose locations to look at specific areas of interest.
1) both sides of the bellows in the Y arm beam tube (West) and the beam tube that is on the North side of the chamber - (bellows effect on particulate migration)
2) gate valves - in North beam tube and East beam tube - (gate valve effect on particulate)
3) directly under the gap between the ACB and ITMY - (to measure what particulate is falling in front of the optic)
4) directly in the center of the chamber - requested by Jodi for ICC - (to measure overall BSC8 particulate)


I've chosen to aLog witness plate info under LHO, VE, and I've included the specific chamber in the title, i.e.

Title -> "specific chamber"
Section -> LHO
Task -> VE

I've also attached two in-chamber photos of witness plates placed on Feb. 1 - North Beam Tube and East Beam Tube.

One image attached here, and the rest found in ResourceSpace.

https://ligoimages.mit.edu/?c=959

One image attached here, and the rest found in Resource Space:

https://ligoimages.mit.edu/?c=958

After saving a new version of a wiki page, you see the new version of the page with a message at the top that says:

For my instance in the Pcal wiki, I finish editing the wiki and arrive at this page:

https://awiki.ligo-wa.caltech.edu/aLIGO/pcalWiki#preview

If I click through a link and come back, I get popups.

But if I go through the normal wiki page:

https://awiki.ligo-wa.caltech.edu/aLIGO/pcalWiki

...everything works as expected.

The default nds2-client software for Mac OS X workstations for H2 has been changed to use nds2-client-0.8.2.  Users of Matlab should execute matlab from a terminal window rather than clicking on the matlab icon in order to get the environment set up properly.

Note that there are a few machines (end Y, psl enclosure) that have not been configured to run matlab from the command line yet.  This will be done on a normal Tuesday maintenance schedule.

Following the test whereby h2fw0 and h2fw1 had their QFS file systems switched: the Sataboy QFS in the LDAS server room continued to have problems. We have decided to rebuild the /ldas-h2-frames file system. Since h2fw1 is currently writing to this system, I have put h2fw1 into partial mode. It is running, but not writing any frames at all. The /ldas-h2-frames file system has been unmounted from h2fw1.

I've mounted the /cds-h2-frames file system to both NDS machines during the rebuild and repopulation.

Attached are plots of dust counts > .5 microns.

The BSC8 HEPI was placed on the fixed stops during the Dome install as the crew can't help but stepping on the Crossbeams.  Once the Dome bolts had been torqued, I suspended HEPI again and read dial indicators for a final delta from last alignment time.

Of note, the before & after dial indicator readings captures the ACB swung back and in place and I saw a 2mil(.002") lower reading to the west while the ACB had a little more leverage on the system--may be within the noise of DI reading and robustness.

Anyway, post final alignment numbers on Jan 19:
Level--There is a 5mil tilt down on the northside.  Our Dial Indicators are essentially at the Support Tubes so I put this tilt in the small category: 0.005"÷60"=80µrads
Position: I see a <6mil shift to the South & <10mil shift West.
Rotation: The dial indicators imply a CW (from above) of no more than 60µrads.  This is worse case as the SE corner shifted South 9mils and the NW corner shift South 1mil.  Averages would reduce the rotation amount.

As this is a close out, I've attached 17 pages of my log book mostly showing dial indicator readings and elevation surveys while we adjust to IAS requests and install and center HEPI Actuators.  I know it is a bit messy but it is a logbook.  If you need clarification just ask.  A couple notes:
DI readings are in .001"(mils).
Corner 1 is NE, 2 is NW, 3 is SW & 4 is SE---This is different from LLO established pier numbering.  I'll try to conform to this in the future.
V T & L corresponds to vertical, Transverse(N-S), & Longitudinal(E-W)

Jim & Corey (I helped a little) put the 600lbs on top of the H2 ETMY ISI Keel.  We passed the Keel Mass components (50lbs each) from the floor to the man on a four foot ladder.  In turn the mass was then passed to the man (Jim) standing on the Test Stand.  The mass was placed as per D1000897-v2.  This should put us very close to balanced when the mass is replaced after Cartridge install.

ETMY R0, L1, L2 Open Light counts, offsets, and normalising gain values.  Offsets are calculated by dividing the open light counts by two and multiplied by (-1).  The gain values are calculated such that the open light counts are normalised to 30,000cts.
-----------------------------------------------------------
R0 
controls@cdsws1:~ 0$ tdsavg 30 H2:SUS-ETMY_R0_OSEMINF_F1_IN1 H2:SUS-ETMY_R0_OSEMINF_F2_IN1 H2:SUS-ETMY_R0_OSEMINF_F3_IN1 H2:SUS-ETMY_R0_OSEMINF_LF_IN1 H2:SUS-ETMY_R0_OSEMINF_RT_IN1 H2:SUS-ETMY_R0_OSEMINF_SD_IN1
29408.9
26594.2
28718
28591
27628.8
29841.9

OSEMINF OFFSETS:
F1 = -14705
F2 = -13297
F3 = -14359
LF = -14296
RT = -13815
SD = -14921

OSEMINF GAINS:
F1 = 1.020
F2 = 1.128
F3 = 1.045
LF = 1.049
RT = 1.086
SD = 1.005
-------------------------------

L1
tdsavg 30 H2:SUS-ETMY_L1_OSEMINF_UL_IN1 H2:SUS-ETMY_L1_OSEMINF_UR_IN1 H2:SUS-ETMY_L1_OSEMINF_LL_IN1 H2:SUS-ETMY_L1_OSEMINF_LR_IN1
30801.6
26947.8
31350.3
32767

OSEMINF OFFSETS:
UL = -15401
UR = -13474
LL = -15675
LR = -16384

OSEMINF GAINS:
UL = 0.974
UR = 1.113
LL = 0.957
LR = 0.916
------------------------------

L2
controls@cdsws1:~ 0$ tdsavg 30 H2:SUS-ETMY_L2_OSEMINF_UL_IN1 H2:SUS-ETMY_L2_OSEMINF_UR_IN1 H2:SUS-ETMY_L2_OSEMINF_LL_IN1 H2:SUS-ETMY_L2_OSEMINF_LR_IN1
23679.1
23181.5
26177.6
23786

OSEMINF OFFSETS:
UL = -11840
UR = -11591
LL = -13089
LR = -11893

OSEMINF GAINS:
UL = 1.267
UR = 1.294
LL = 1.146
LR = 1.261

Insulation work is finished. Next week the interior drywall will be attached, roof plywood installed, and feedthrus drilled.

This afternoon, after a quick consult between IAS/SUS (Dennis, Calum, Hugh, Gerardo, Travis, Doug, Jason, me), it was decided that we would proceed with translating the QUAD to bring the longitudinal measurement back into tolerance.  So, we will mobilize to push the suspension ~4mm towards the corner station.  Doug has confirmed that on Monday (and probably Tuesday) IAS/SUS together will:

- fix pitch R0
- translate QUAD longitudinally, monitoring yaw, x, y

 --Need to insert possible "fix" to R0 roll/side shift if indeed we need to.  Norna is checking on tolerances of these DOFs.

- make IAS gap measurement
- Adjust R0 to fix gap and yaw if needed.

OSEM general health has been checked, and all open light voltages have been measured and set.

Earlier this month, we had made a complete assessment of all aLIGO SUS signs and flips across suspension types (see T1200015) and currently functional builds of those types (see SignStatus_120111.pdf). 

In doing so we identified:

- Some suspensions had a few of their magnets flipped
- The BSFMs had some mistakes in their Basis Transformation Matrices
- Some suspensions had there OSEMINF sat-amp compensation filters defined with more poles than zeros
 

For the most part, we have now rectified these problems. I attach a new assessment. The remaining action items are

- Fix H2 ITMY M0's F2 and F3 magnet sign; to fix when we swap out for real ITM Optic
- Figure out what's wrong with X2 PR3's SD OSEM; currently under investigation.