Greg G., Hobo S.

HAM 7 now has the HEPI housings and crossbeams installed. Final positioning still needs to take place. I tried a different method of attaching the crossbeams; clamping them to the housings before fully setting the weight of the crossbeam onto the support tubes. When they are sighted in we'll see if this made a difference. Doing so seems to help keep the feet inside the housings more level.

Space was very limited in between HAMs 7 & 8 which led to me having to crawl under the chamber to reach all of the bolts. While there I encountered a friend (picture attached), however, we were in laser hazard and lacking proper safety glasses he had to be escorted out of the LVEA.

Work in LVEA for the PSL chiller room
Work down at Mid-X and End-X for the preparation and move of the BSC 5 chamber to End-X
Gregorio out to Mid-X
SUS and SEI commissioners out in the LVEA at various times.

Dust levels spiked in the LVEA North Bay just after lunchtime on dust monitor 7 (H0:PEM-LVEA_DST7_3 and H0:PEM-LVEA_DST7_5).  The levels spiked up to over 22,000cts from a nominal ~100-300cts. 

The Bake Room monitor spiked as well at a later time from the LVEA spike.  Plots attached. 

The BSC from the X-arm mid-station was successfully moved to the end station. The operation went very smoothly and efficiently: this move took about half the time of the Y-arm move. Photos will be loaded to Resource Space.

E. Effler, R. Lane, J . Kissel, B. Shapiro

After Anamaria successfully completed transfer functions at LLO of QUAD11, and Robert was able to complete transfer functions of H2SUSITMY (QUAD02), I've collected all the data* we have on the assembled and tested QUADs (@ LHO, QUAD03, H2SUSITMY; @LLO QUAD11, 12, 13, and 14), onto a single set of plots.

From these results, we can conclude that H2SUSITMY's reaction chain has it's second pitch mode too low, compared with all other QUADs. This mode is particularly sensitive to the d's (distance between suspension break-off point and center of mass for a given stage) of the TOP / UIM stage (either dn or d1, see T1000458, QUADModelParamsDiagram_T1000458-v6.pdf), to which the only adjustable physical parameter this corresponds are the TOP and UIM blade tip heights. The guess (from discussions with Brett) is that with such a large deviation in the Pitch mode, that such a discrepancy in blade tip heights should be visible with the standard gauge block measure of the heights. 


*Note that I've not included QUAD01, who's measurements were bad because of measurement error, and also, a few of the degrees of freedom on QUAD03 show low magnitude -- this is also measurement error (not driving hard enough), we believe the dynamics are OK.

(Corey, Jeff, Jim)

Overall Assembly Tweaks

Trillium Doors were installed, bolt-on weights were installed, and then the system was checked for balance.  Jim noticed a slight rotation from lock/unlock state and adjusted Lockers accordingly. 

In-Vaccum Cabling

In-vacuum cabling was run to the mock-feedthru for the Trilliums, L4Cs, GS13s, and Actuators. 

For the Actuators, their cables were rung out to determine which wire (actuator-side) is the "center" wire on the feedthru-connector-side.  We then connected wires to Actuators in consistent manner on the Actuators (hopefully it was the right way sign-wise...we'll see when we can start actuating). 

The Capacitive Position Sensors (CPS) were not run to the mock-feedthru because we are missing their triax connectors (should be receiving later this week); in meantime, we will use actual flange-feedthrus. 

Class-B name tags were attached to in-vacuum cables (on the ends connecting to the mock-feedthru).

Test Stand & In-Air Cabling

The Test Stand, as it was positioned, had cables which couldn't reach Assembly#2, so the rack was powered down, and rolled a few feet West. 

The In-Air cabling was then sorted and bundled for connection to the dirty-side of the mock feedthru.

The crew spent the morning moving a cleanroom out of the laser enclosure (It will be used as a clean area for assembling air drills.), straightening up the bay by HAM-1, and moving small chamber cleaning paraphernalia from BSC-7 to the BSC-8 area. Once Kyle got a chance to remove the pump by BSC-8 and hard close GV-5, several loads of chamber cleaning equipment and two 7'x 10' cleanrooms were flown over the beam tube.

Doug and I agreed on a plan forward for the working in the LVEA for the remainder of the week. (I posted it to the alog earlier if anyone is interested.) 

FTIR results for the BSC-7 chamber body arrived from JPL this afternoon and were forwarded to the Chamber Cleaning group for analysis and comment. 

The alarm is going enough right now to indicate a low temperature value, but the trend shows normal-looking behavior.

Kyle, Gerardo 

Recent attempts at sealing the ceiling tiles and damp mopping/wiping the floors and walls etc. have had virtually no impact on the particulate monitoring counts in room 169 (OSB bake-oven room) -> Recalling that the particulate count increase roughly coincided in time with the decision to keep the door closed between the bake-oven room and the adjacent vacuum prep lab., I decided to prop open the door and leave it open overnight.  The result was a return to traditional particle counts in both rooms, i.e., a major improvement in the bake-oven room and no change (or a slight improvement) in the vacuum prep. lab -> I'm leaving this door open until overruled by a higher power

- FredR in place of MikeL for INS coordination today
- Reibold on site, cautioned against bringing in Mountain Dew and paper towels to LVEA (contamination concerns)
- Laser Hazard all day today for squeezer work (compromise with Doug Cook and IAS in exchange for no laser hazard Wed. - Fri.)
- Jodi staging in HAM1/South Bay area for BSC8 ICC
- GregG working around HAM7
- Braising at EY
- Test stand assembly at EY
0900 - Diamond Frieght shipment for TerryS and BetsyB
0910 - Scrap wood bin replacement
0931 - UniFirst arrives
1108 - Septic Tank trunk arrives
1126 - Walter and Gregorio to MY
1200 - Praxair begins filling wrong tank by LVEA, Kyle fixes situation
1330 - RichardM and CyrusR move H2 Y-arm racks to accommodate monument surveying.  Dust alarm by ISI stand as GerardoM and KyleR were working in the area
1332 - Kyle begins closing GV5
1500 - Gown room placed near BSC8

Co-ordination Planning for LVEA
02-05 August 2011

Tuesday, 02 Aug 2011-Laser Hazard
	Kyle to remove pump cart from near BSC-8 and hard-close GV-5
	Richard / Apollo to slide the ISI racks forward to accommodate survey crew on Y-arm
	ICC to stage all possible items to the PSL-1 area, including 2 garbing/staging cleanrooms
Wednesday, 03 Aug 2011-Laser Safe-Crane work restricted during shots
	Doug and crew to take required shots along Y-arm
	Kyle to vent volume needed for BSC-8 entry?
Thursday, 04 Aug 2011-Laser Safe-Crane work restricted during shots
	ICC to move large cleanroom over BSC-8 chamber (as long as shots are finished) 
	ICC to remove cleanroom from BSC-7 and set it down out of the sight lines for new H2 shots (Dome cleanroom)
	Doug and crew to take required shots along X-arm
Friday, 05 Aug 2011-Laser Safe-Crane work restricted during shots
        ICC to move dome cleanroom into place near HAM 11-12 (as long as shots are finished)
	Doug and crew to complete survey work

We tested a clean method of power cycling a front end. First all user models were killed, followed by the iop. At this point the only things running were the awgtpman process which were restarted by monit. We then IPMI power cycled the frontend (h2susauxb478) and did not affect the daq status of the other running front ends.

I'll write this up as the reboot procedure for frontends in the wiki.

We then simulated a loss of the h2boot server by disconnecting it from the H2FE LAN. The front end medm screens froze up, but did not go "white screen". All medms just froze in a "good" state. The control room workstation of course slowed because they tried to mount /opt/rtcds, and no new medms could be opened because of the file server loss. When h2boot was re-attached to the LAN everything came back alive. Vincent looked at an ISI fast channel and verifed the front end was running and sending data to the DAQ for the whole time.

The H2:SEI system was renamed H2:HPI

The BSC8 model name was changed from h2seiitmy to h2hpiitmy. All corresponding INI, PAR files where also changed. The DAQ was reconfigured to use the new files.

The overview MEDM screen was also changed, and the old h2seiitmy target moved to the target_archive area.

In other CDS news, the new frame files had errors in their names. H-H2-R should have been H-H2_R. This was changed for all frames on h2fw0,1 and all existing frame files were also corrected.

(Corey, Eric, Fabrice, Jim)

BSCISI #2

Reamed out the Base Flanges for the Vertical GS13's.  They were installed via the forklift (see photos). 

Here are the Vertical GS13 serial numbers:

Corner1:  88 (not vacuum-ready, must be replaced!)

Corner2:  52 (not vacuum-ready, must be replaced!)

Corner3:  48 (not vacuum-ready, must be replaced!)

Trilliums were fitted with 2.5" long bolts (really need the 3" ones, but they're being baked).  Once the Trilliums were bolted down we installed the Horizontal L4Cs (one of which is a "bad" one which is not for use in our vacuum system and will need to be replaced. 

Here are the Horizontal L4C serial numbers:

Corner1:  34 (this is the bad one!)

Corner2:  30

Corner3:  10

Eric's installed the remaining Capacitive Position Sensors, so now all of those are also on the system.

Installed Horizontal GS13 Walls (Stage2), removed excess weights, removed Stage1-2 Alignment Pins, unlocked Stage1-2, balanced, adjusted lockers for horizontal alignment, and then called it good.  Tomorrow, we'll install Trillium Walls, run cabling, and address any final balance issues.  Then the system is ready for testing.

BSCISI#3

Installed & torqued down the third Blade Post (pulled out of oven recently).

The dome was returned to BSC-7 this morning. During the inspection of the dome flange o-rings, a fiber (saved) was found and removed. Kyle came out and took a look at the fiber and told the crew what to beware of, etc.  Since no further issues were encountered, the dome was put in place and secured.

After lunch, Mark L. and I went into the chamber to remove the dust barriers, inspect the beam tube convolutions, and vacuum them if needed. We did end up vacuuming with the LLO-designed bellows vacuum attachment. Mark also inspected the floor on the way out of the chamber and removed a couple of "spots". 

The final planned activity of the day was replacing the door on the chamber. The door interior was inspected once it was inside the cleanroom. The welds were not nearly as bad as those in the dome and the door body was not very dirty either (neither left much visible residue on a clean glove, even with a couple of attempts). The decision was made not to do any vacuuming or wiping on the door, but to leave well enough alone. The door was replaced and secured.

I put the MetOne 227B serial number 980500281 at end X location 1.

Betsy, Lisa

Betsy and I tried to clean the silver coated primary mirror (D1000075-v1) of the H2 OAT Transmon telescope.

We did as follows:

1) Blow off the dust from the mirror
2) Soak the mirror (but not the surface) in DI water + 1% liquinox for about 10 minutes
3) Scrub the edge and the back with the soapy solution 
4) Remove the soap with DI water

At this point we noticed that the back surface and the barrel still had marks (I think they used a pencil or something similar to define the alignment reference lines before scribing them). So we decided to scrub with methanol to try to remove these lines. By doing that, we noticed that sticky brownish stuff remained attached to our wipes..(see picture). We locate the problem in the bevel at the edge of the coating. We continued to wipe down (kind of aggressively) until the wipes remained clean. So, we can summarize the procedure with:

5) Wipe down with methanol the barrels, in particular the bevel, and the back surface, until the wipes remained clean.
6) Sticky stuff were also present at the very edge of the surface. We removed them by wiping (more gently) with methanol
We might have removed some pieces of the small area at the edge of the mirror where the coating was damaged.

After that, we moved to the surface.
We tried to remove some of the particles on the surface by wiping down with methanol, but very gently, as we worried that we could damage the coating. We are sure we removed at least one spot, which made us think that these spots are not inside the coating. However, we can't remove most of them.

So, the message: we are ready to do an FTIR test on the substrate, to see how the cleaning went.
About the surface, we removed the dust, but we didn't really remove the spots that are there (only a very small fraction), and it is really hard to judge if wiping down with methanol really helps.


I brought Keita and Bram to look at the mirror, and we tried again, unsuccessfully, to attack some of the spots. By looking at the mirror with an inspection lamp showed greenish halos and thousands of spots all around the surface (those probably due to the coating itself).

So, the plan is to go on with the FTIR test. 
For the surface, probably the best idea we had so far is to leave it as it is. 

Construction of H2 PSL chiller room
Mid Columbia Forklift arrived on site
Boom truck rental delivery
Cleaning of BSC7 dome