Kyle, Zack, Rodney - Hung BSC7 east door on chamber. Kyle - Began pumping Vertex and HAM6 volumes. Kyle - Switched Y-end from MTP to Ion pump, spun MTP down, shut-down QDP80
We realigned and balanced Quad 2 after adding weight to the test masses to account for the increase weight of the glass masses. We had to replace the three lower wires on the Main Chain due to stretch. Found the flags for the UI OSEMs need to be installed and run in at least half way to attain proper pitch. We characterized all magnets and checked polarity per E1000617. BOSEMs on the Top mass have been tested for full range function and are set to their mid points. We will start testing the Top Mass BOSEMs on Monday. Notes: (1). The blade stop bolts must be run down so the head is below the level of the magnet holder. If not they will interfere with the left and right BOSEM alignment. (2). Watch the side magnet and flag, as it is prone to hanging on the BOSEM, causing misalignment. (3). Be sure to square and level the Table Cloth before adjusting the BOSEMs. This is especially important for the correct positioning of the left and right BOSEMs. Failure to set the Table Cloth properly can cause the BOSEM to push down on the Top Mass, throwing off the alignment of the other BOSEMs.
Cheryl removed optics from BSC7 Kyle put door back on BSC7 More squeezer work Truck jackknifed on Rt. 10
Where it will find a new home in the physics building atrium display case.
The controller, pressure regulators, and other hardware are stored in a plastic box with the legs. Ballast tanks and tripods are on a second pallet. Both pallets are in the 4k PSL bay.
There is now a dust monitor back in the bake room, using the spare I had for testing. I have given it back location #3, and set the location of the one in the control room from #3 to #4.
- Zack, Rodney, Cheryl Removed weights (140 lbs) and steering mirror from the optics table. We then removed all of the auxiliary equip. used to remove large optics (lazy susan, lift table). Final cleanup and storage of equipment will take place after Kyle and crew has put on the door.
Earthquake Stops from H2 ITMX. I see very little material loss at contact points.
Earthquake Stops on H2 FMX: all have viton tips, so images just show spacing.
We borrowed these devices so far: Power meter unit 5 ISCT1 viewer Beam Profiler Photon XYS SR785 Agilent 4396B 2 oscilloscopes Since we are going to use them massively in the next weeks, we will keep them in the SQZ area. If you need them, just let us know.
Mobile location #3 in the LVEA is monitoring the dust beneath the door of BSC7 as of ~9:23 this morning. It was moved from BSC8. Attached is the full data trend from before the removal of the door to after the end of the LOS removal. The beginning may incorporate time from before the monitor was moved from BSC8.
Key Points: BSC7 - H2ITMX and H2FMX removed Squeezer - On! Specific authorization + specific glasses required for entry to squeezer area Times in PST: 1214 - Zach cuts himself by BSC7, MikeL brings first-aid kit, assess situation. 1320 - CarolB arrives for Betsy 1323 - DEA notifies LHO that Squeezer laser is on, and Squeezer area is in hazard condition. Normal laser safety eyewear is not sufficient for protection in this area 1350 - Hanford emergency services calls with test message 1502 - Oscar is done bailing tumble-weeds for the day 1715 - OSB Doors Locked
- Jodi, Jim, Patrick, Zack, Rodney, Cheryl BSC7 large optics removed - H2 ITMX and FMX. The black glass beam dumps and supports were also removed. Tomorrow: remove weights and one steering mirror, and equipment for removing LOS (lazy susan, lift table). Also: Evaluated the plan for removing BSC4 (H2 Beam Splitter) structures, and decided that going through HAM9 or HAM10, depending on whichever is available first, would be the safest route to go.
The lasers on the squeezer setup behind the barriers in the LVEA East Bay have been activated, and the area is now a laser hazard zone and will be properly marked when the lasers are on. Access is restricted to authorized personnel. Note that the old LVEA glasses do not meet the requirements of this area.
This is the Xarm after one windstorm. And the motorcycle parking is compromised. Photos by Richard.
Others assited
I updated the filter bank on the quad test stand again to capture a few corrections that had been made to LLO's /opt/rtcds/tst/x2/chans/X2SUSQTS.txt since it was generated from LLO's /cvs/cds/llo/chans/L1QTS.txt in the recent upgrade. (A few filters had names that did not match their functions.) I took the LLO X2SUSQTS.txt file, changed all the instances of QTS_ back to Q1_ and installed it at LHO /cvs/cds/llo/chans/L1QTS.txt. The L1QTS.txt file that was in place for a day is at LHO /cvs/cds/llo/chans/L1QTS_LLO_20101117.txt. I also went through the MEDM screens and made sure that the correct filters were enabled (some filters are in different positions relative to the old LASTI set).
It is using the 4K OMC line.
Began pumping YBM. Dewpoint of "blowdown" air comming from YBM after decoupling purge plumbing measured -16C (John elected to not repeat exercise previously done with X-end ((see recent entries))but rather to just pumpdown)*Combined Diagonal with XBM by opening GV4*Vented combined volumes*Removed all but (4) loosened bolts from BSC7 east door. Engine hoist connected to door and taking some of the load.
Main activities for today:
