(Corey, Eric, Greg, Hugh, Jeff G., Jim, Mitch)

BSC ISI #1

Only subassembly work today.  Today the Flexures were assembled. 

Also lots of organizing of parts.

BSC ISI #2

Spent most of the day flipping the Big Oven with Big Plates for the Assembly.

- No laser hazard today.
- Hugh and Apollo transport items between outbuildings.
- Terry Santini makes rounds at outbuildings.
- Gerardo and Keita take photos at REFL port and ISCT4.
- Dell support arrives for JonathanH.
- JonathanB measures viewport height at EY.
- Big group for Friday public tour.
- Ongoing preparations for welding in LVEA.

(Corey, Eric, Greg, Hugh, Jeff, Jim, Mitch)

HAM ISI #3

This assembly was removed from the Test Stand, placed in Storage Container, and has left the Staging Building----we now have more room!!

BSC ISI #1

Jeff & Eric pecked away at subassemblies.  Large & Small Actuators are just about done and are on the shelf awaiting installation.  Jeff has just about finished both types of Lockers.

BSC ISI #2

Have installed Adapter Plates on Test Stand, used Tooling to position Boxbeams, torqued down Boxbeams.  We still need to check/adjust level.

• Flooring work on H2 electronics building
• Powercycled H2adcumy to bring it back up, this seems to happen once a week
• Keita and crew in HAM6 inspecting the OMC. They found nothing obvious, but may go back in tomorrow
• Jodi running the air drill for box test

The annulus-type O-ring joints between GV11 and the removed/reinstalled iLIGO spool, this iLIGO spool and the new aLIGO GNB-sourced spool and this new aLIGO spool and the iLIGO beam manifold spool (3 joints total) were pumped down by hanging a small turbo at the closest annulus pump port and backing this turbo with an aux. turbo pump cart.  In all cases the indicated pressure at the CC of the aux. turbo inlet reached the mid 10-6 torr range after pumping for a few hours.  

The spools were vented at the time of the test.  These annulus joints are considered acceptable.  

(see previous entries regarding over temperature issues with CS Kobelco and Vertex+XBM QDP80 pump) 

Investigation showed that the chilled water for the Corner Station was running low.  Supply to highest elevation was ~15 psi (30 psi normal). -> Added ~10 gallons of glycol to CS chilled water system and QDP80 temp warning ceased within 10 minutes.  Normal temperatures by 120 minutes -> OK

The CDS control room main file server developed a problem at 19:30 Wed night and went into "read-only" mode. Reboots at 10:22 this morning cleared the problem. 
For future reference, here are the three emails it produced at the time of the problem

May 25, 2011 07:30:05PM - Controller 0
INFORMATION - Cache synchronization completed: unit=0

May 25, 2011 07:30:06PM - Controller 0
INFORMATION - Enclosure added: encl=0

May 25, 2011 07:30:33PM - Controller 0
INFORMATION - Enclosure added: encl=0

GV 7 soft closed
Swagelok representative arrives to meet with Apollo
Linoleum contractor arrives to meet with John
Diamond Freight pickup
H1 BS, ITMX and ITMY were unlocked from the earthquake stops. However, the BS side sensor looked abnormal, and Keita will go in to take another look.
Delivery from Oxarc for Kyle

(Corey, Eric, Fabrice, Greg, Jeff, Jim, Mitch)

So when we have parts, the SEI Team can throw down and battle with any schedule!

BSCISI#1

---Main Assembly:

There has been tons of work on this assembly.  Stage1 Closeout ("top") Plate was installed recently, and then the rest of Stage2 was attended to.  This morning we put the BSC ISI's "top hat" on (i.e. the Stage-2 Keel Base top plate).  This pretty much does it for big plates on this assembly.  Now we have lots of sub-assemblies and mass that we need to start loading onto this system.

---Sub-Assemblies:

The Small (Stage 1->2) Actuators have been assembled, and the Horizontal ones have been installed on the Main Assembly.  The Large (Stage 0->1) Actuators are currently being assembled.  A large and small Locker have also been assembled, and the rest can be built at any time.  As for other sub-assemblies, we have been working on kitting up parts for:  Sensors (for Stage0/1 & Stage1/2), Flexures (for Stage0/1 & Stage1/2), Blade Assemblies(for Stage0/1 & Stage1/2), Spring Pull-Down tooling, Spring Pusher tooling, and Blade Safety Restraint (for Stage0/1 & Stage1/2).  For the most part we look pretty good for parts and hardware.  There are a few things which are missing but they are only days away from being made available.  So, some of these sub-assemblies can be put together now, or when they get their missing parts, in a few days.

BSCISI#2

Stage0 has been put on the Granite Table, and is ready to be pre-assembled (i.e. dowel pins, helicoils, etc.).

HAMISI#3

Storage Container is in the Staging Bldg & has been cleaned.  The lifting hardware for the ISI is installed.  Tomorrow we plan on loading this assembly in it's storage container.  This will free up even more space for us in the Staging Bldg.

Shortly after the Apollo crew torqued the "big end" of the new aLIGO GNB-sourced spool installed in place of BSC6 at the Y-mid station, I began pumping the annulus volume using a small turbo hung from the spool's pump port and backing this turbo with an aux. turbo pump cart.  I will log the pressure information at the 24hr mark.  The pressure has been falling predictably for the initial 4 hours.

9:00 – unifirst delivery

10:00 – unlocking of HAM 6 ISI by M. Landry and crew.  

10:30 – Richard & Filiberto to End-X to look at vacuum racks.  Later also to End-Y, Mid-X, and Mid-Y

11:15 – unlocking of ISI completed.  HAM 6 door re-hung.

~2:45 – PSL chiller alarm.  Michael R. went out to investigate.

3:45 - delivery on-site

The QDP80 roots pump serving the Vertex and XBM MTPs developed a temperature warning ~10 days ago and adjustments to the thermatic control valve have not resolved the overtemp (66C at pump body, < 60C is normal) -> I spun-down the Vertex and XBM MTPs and will investigate tomorrow when QDP80 is at ambient

Preparations were made for unlocking in HAM6 but the door remains on.
The HAM storage thingers were moved to the east bay, against the wall north of HAM6.
Prep work for the spool installation in the MY gap included roughing concrete for the footprint.

0925 - Bradley comes in to see Bubba from Apollo
1015 - Landry, Bubba, Mark finish installing HAM1 cleanroom cover
1045 - Reibold Construction arrives for MichaelR.
1500 - HAM1 optics unlocked and closed.  That makes HAM1,HAM2,HAM3 optics unlocked.  Air pressure in HAM1 ~820 torr.
1500 - One spool piece inserted and anchored in MY void.
1525 - Betsy to roof.

Discovered that the Kobelco compressor (Corner Station purge air supply) had shut down due to high oil temperature -> Restarted and adjusted the throttle valve which supplies cooling water to the oil heat exchanger -> Purge air was OK during removal and reinstallation of HAM1 East Door.  Must have shut down after the West door was removed but before it was reinstalled as exiting air was noticed when the West door separated but purge air pressure absent when the West door was rehung.

Nicole, Scott, Ed, Bubba (Apollo)
Kyle, Jodi, Mike L, Mark H.(LHO)

On Wednesday the BSC Dome was removed from BSC5 at the MidX station.  On Thursday the In-vacuum seismic isolation platform was removed and the Dome was replaced.
Elements of the passive stack still need to be separated and some elements preserved.  Further, one more in-vacuum operation is needed.  The Support Tubes need to be chocked in place and strapped down for transport.  This will require a few hours for a few people--let's say 3 & 3.  At that time the door can be replaced.
Currently the Dome bolts are all installed but not torqued.

Of Note:

*** The SUS feed thru on the Chamber now has a broken 4-40 screw body in one of the four threads. ***

As I'll likely be instrumental in installing the 25 additional feed thrus required for advanced LIGI on each chamber, I'm sure I'll remember this one.  And likely, the flange will have to be removed anyway as something other than the d-sub will be required in that location.

Stage1 Installed on Full Assembly

After measurements from Wed, some Walls & the Closeout Plates (on top) were removed from Stage1.  Stage1 was then attached to the full Assembly.  While lowering Stage1, we were not that level and this looked a little worrisome to Fabrice, so we re-hung Stage1 by changing eyebolt position---this improved level enough to attach Stage1 onto the Optics Table. 

While inspecting the Assembly, it was discovered that some "arrows" machined onto Stage0 & Optics Table (which is part of Stage2) did not produce the result we wanted.  The arrows were lined up of course, but the whole purpose of these arrows was to establish a correct orientation for Optics Table.  On the Optics Table there are 3k+ holes, and then therae are line-grooves as well.  These lines are desired to be parralel with the Support Tubes.  Unfortunately, the arrow on the Optics Table orients the grooves out of rotation.  [In the afternoon, the team was going to lift Stage1/Stage2 such that the grooves are lined up]

Subassembly Work

Parts were unwrapped and laid out for Spring Pull Down and Spring Pusher tooling.  Sensor parts were also laid out.  We will go through all these assemblies to confirm we have all the parts/hardware needed.

Clean & Bake

Assisted with wrap/bag/tag of parts pulled out of ovens.

Work has begun on installing HEPI onto HAM 7. The Dirty Room was moved and a cleaning crew was brought in to clean up the ground in the area. The chambers should also be cleaned as well, but this will have to happen later (hopefully Friday). The HEPI frames have been lifted onto the piers but will remain loose until they can be brought into their final position with the crossbeams.

Turned off the heat in both ENDY and ENDX. This may cause VEA temps to wander a bit during the night until it warms up a little.