[Corey, Greg, Hugh]
With new numbers, we went about setting the HEPI Foot to their nominal positions prior to installation. This afternoon we made it through (2) HEPI's. Tomorrow we'll finish the other two and then start on a HAM set.
Replaced both check valves at X mid station control air compressors Ran well pump to fill tank Re-started Staging building booster fan
Changed out the CS control air compressor check valves.
Linoleum put down in H2 PSL area HAM8 was moved Tumbleweed bailing
The remaining 2 pitchforks were assembled and put onto stage 1 today. What boxworks walls we do have were prepped with dowels and are sitting on the granite table.
The iLIGO primary framewriter (fb0w) was put into partial mode (not writing frame files) as LDAS upgrades this disk system. So only fb1w is writing frames, which are being served by nds2.
Please use nds2 for archived data until LDAS has completed their upgrade.
10:45 – Kyle to X-end to continue yesterday's work. contractors moving beams around in the LVEA ~3:00 – tumbleweed bailing completed
[Corey, Greg]
Received (3) big plates for the BSC ISI and unloaded at the VPW
Transferred Pitchfork & Boxwork Stage1 Walls from the VPW to Staging Building. Started pre-assembly work on these walls (i.e. pressed dowel pins and inserted helicoils). Assembled (1) Pitchfork (and installed on Stage1 [just pinned to Stage1]).
Moved pallet of HAM-ISI#3 BAD plates out near Fire Water Tank lay down area.
This completes the site, i.e., all 80K (LN2) pumps now have mechanical differential pressure gauges mounted beside the 80K vessels on the same stand used to mount the CDS pressure/electrical pump level and exhaust transducers. These will allow us to have an indication of the 80K pump levels in the event of a power outage or other CDS failure. As labeled, 38" H2O equates to 92% full which is the nominal level for the site LN2 (80K) pumps.
Linoleum was removed for laser room and ante room, and a skim coat was added where needed. Contractors were about to glue the new linoleum down but the glue they had was unusable, hopefully they will have more tomorrow.
Required temporarily depressurizing plumbing supplying CDS level transducers. Hope to continue at X-end tomorrow.
~9:00 Hugh and contractors installing HEPI on BSC 7
~11:00 Kyle to begin Plumbing mechanical level gauges at Mid-X and End-X.
- a CP alarms went off, HVE as well at Mid-X
~11:00 – Hugh to begin removing the north door of HAM 8, block the support tubes, and remove the external SEI
3:30 – on-site arrival to work on copy machine
[Corey, Greg, Jim]
A new Stiffener Assy was installed under Stage0
On Stage1, The Keel Base was removed. The Pitchfork & Boxwork Assemblies (i.e. Stage1 Walls) were also removed and disassembled. The Keel Base & Stage1 Walls were then pulled out & stored outside on a pallet.
Next up: Begin building up Stage1 Pitchfork/Boxworks (when new clean parts become available).
Ran well pump this morning to fill tank
David & Scott (Apollo), EricA, Hugh We got the HEPI Housing up on the NW Pier, so approaching 3/4s done on BSC7. May need to redo a few things with new shims to prevent interferences but we don't have a lot of room with which to play.
Installed mechanical level gauges in parallel to CP4 and CP3 level transducers. Resulting alarms for CP4 and CP3 are the result of this. Indicated levels should settle down over the next day-I am monitoring from home
[Corey, Jim, Mitchell (with Justin helping us move the cleanroom)]
Today we addressed the Stiffener Assembly under State0. Unfortunately, we were not able to disassemble the Stiffener as is. 2-3 bolts of a Support Post Gussed were inaccessible. So basically we had to lift Stage0, unscrew a few bolts, and then lay Stage0 down again.
After this, we removed all Stiffener plates (these are more of the badly machined plates and will be thrown outside in the desert).
At this moment, the new Stiffener Assembly is being assembled.
Note: Particulates documented from Spring Pull-Down Assy (see attached photo).
Doing a test install of the HEPI Horizontal Actuator yesterday on the NE corner of BSC7 I find an interference where the Actuator runs into the Housing. See the photos attached. The first photo(003) is the Actuator held by the lifting jig. The second photo(001) shows the Actuator Tripod seated to the Crossbeam Foot and the third photo (002) shows the interference between the bottom support weldment of the Actuator as it runs into the HEPI Housing Side Frame. It may be a unique condition of BSC7 but I think it will be a recurring problem. The solution should be a simple permanent shim and I'll have to use longer bolts. However, I'd like to investigate before deciding on a blanket solution.
[Corey, Jim, with cleanroom move help from Andres, Mitch & Robert]
Released Spring #1 & #2 (#3 was released on Wed). The Springs were then untorqued of Spring Posts and removed from Assy. The Flexure Assemblies were slipped out from the Flexure Mount. Will keep Flexure Mount assys torqued on the Spring tips (there's no need to remove them, and removing them has been observed to cause damage to the Spring and Flexure Mount hardware). Spring Compression tooling was removed, and we were staged for Stage1 removal.
Spent lots of time shuffling & clearing out Staging floor (there was no room to maneuver the forklift for out needed work).
Filled forklift batteries with water (many cells were dry); it took two full jugs of water!
Forklifted Optics Table from Assembly Stand, and moved it out of the way and landed it on Test Stand in other cleanroom.
Stage1 was craned off of Stage0, and it was layed on the Assembly Stand. This required (5) people because we had to have a person on each cleanroom leg to move the cleanroom as we craned Stage0 over.
Note: Regarding hardware, assume we will re-use all the hardware (I'm mainly referring to bolts/washers) we are pulling out here.
Swagelok delivery for Hugh Office Products delivery 10:25 Mayflower picked up the remaining IO beam tube 12:50 Dale brought in a tour 13:52 Jonathan B. went to take pictures of PCAL Terry S. craned the auto scrubber over the beam tube HAM 11 was moved behind HAM 12 The clean room from HAM 12 was moved over HAM 11