Reports until 00:42, Thursday 18 August 2011
H2 INS
jeffrey.kissel@LIGO.ORG - posted 00:42, Thursday 18 August 2011 (1245)
(Metal) H2 SUS ITMY mated with H2 ISI ITMY
K. Arai, J. Bartlett, B. Bland, J. Garcia, G. Grabeel, D. Ingram, J. Kissel, R. Lane, R. Mittleman, H. Radkins, A. Ramirez, N. Robertson, J. Warner, and a large crowd of spectators

We have successfully mated H2 SUS ITMY [[QUAD 02]] (still in its metal configuration) with the H2 ISI ITMY [[BSC-ISI Unit #1]]. A slide show of the afternoon's activity (105 photos -- thanks Koji, Dale, and Norna!!) can be found in the DCC under G1100893. I attach a few highlights here.

Excellent work team!

Important take-aways:
- We've successfully imployed the lifting bars + genie lift system such that we were able to move the QUAD as a whole, without separating the two chains. While rolling under the Mechanical test stand cross beams there was millimeters of clearance, but we did manage to clear it.
- We've weighed the QUAD in its current state to be 774 lbs. Note that there are lots of things still missing from that mass budget, including (but not limited to) the stiffening sleeve, upper structure cross braces, and vibration absorbers.
- We've successfully employed the "cookie cutters" as designed, and layed out in D1101259, HOWEVER this resulted in the only major hitch in the move.
- In our initial pick of the QUAD, we did not pre-assess how little room we'd have once we got under the BSC-ISI. It took a good amount of finagling to allow the genie lift's feet to give us enough play to shove the QUAD as far into the corner as it needed to go given the cookie cutter arrangement.
- As we lifted the QUAD up to the BSC-ISI's optical table, we discovered that the genie lift was not holding the QUAD level. This meant the top of the QUAD did not mate flush with the optical table, and made dog-clamping difficult at best. The solution was to dog it as best we could (over 18 clamps -- plenty enough to hold the QUAD in place), but still with a gap on one side, then lower the genie, wedge wrenched on the lower side, and raise the genie again to support the weight of the QUAD. This worked out great, and yielded a flush mate with the optical table such that we could finish up dog clamping.
- We've installed all dog clamps as per D0900363, using assorted lengths of 3/8-16 bolts into the optical table. Some of these proved extremely difficult to install given that (unlike in the drawing) there's the gigantic donut of the BSC-ISI's Stage 0 in the way. In some cases, it required a two-man job where one held the clamp by reaching between the gap between Stage 0 and the Optical Table, which the other squeezed as best he could between the QUAD and the inner diameter of Stage 0 with the hex driver (eg. pg 99 of G1100893). 

Still to-be-done (in roughly chronological order):
- Suspend the QUAD, ensure visually that nothing's crazy, lock it back up
- Finish QUAD contruction, including (but not limited to) the stiffening sleeve, upper structure cross braces, and vibration absorbers
- Remove appropriate ballast mass from BSC-ISI
- Float & Balance the BSC-ISI, ensure level is retained, lock it back up
- Swap out satellite amplifiers, replace / swap field cables
- Re-Cable up the QUAD and BSC-ISI
- Turn ON QUAD and BSC-ISI
- Ensure / Develop / Test Watchdog interaction between BSC-ISI
- Unlock both, B&K hammer everything, test vibration absorber functionality
- Start playing again!

OH YEAH AND THEN THE FOLD MIRROR.
Images attached to this report