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Reports until 22:25, Tuesday 23 August 2011
H2 SUS
jeffrey.kissel@LIGO.ORG - posted 22:25, Tuesday 23 August 2011 (1281)
In-vacuum SRS cables received!
V. Brocato, J. Garcia, J. Kissel, A. Ramirez, R. Mittleman

We've finally received a load of Class A in-vacuum peek cables from Caltech (ICS Shipment-1998), in which were several lengths of Seismically-Responsible Suspension Cables (SRSCs), D1000225's. Suspensions had been waiting on these since the mate, such that we might have sufficient cable length to connect up the H2SUSITMY QUAD appropriately through the isolation stages of the BSC-ISI, as per the System's drawing D1101477. 

Upon receiving them, Virginia inventoried what was shipped (Drawing and Serial Numbers, see attached's first and second column) because we were informed that what was in ICS was not complete -- which has been confirmed. After identifying that we had a significant number of the needed D1000225s, we went though them to identify their lengths (see third column). D1101477 suggests that we need the 180" length for ITMY and 199" lengths for the FMY, but (as confirmed by Kate Gushwa at Caltech) there were none of the 180" lengths in this load. We did find six of 199" length.

Hoping to press forward, Jeff, Rich, and I began by re-arranging / de-tangling the cables that were coming off of the QUAD, and then assessed what we were missing in order to continue. We didn't get very far. After using the site-aside-because-they're-not-needed UIM Stop Plates as temporary optical table cable clamps, and merely draping the D1000225s over the ISI, we came up with the following list:

- Allen key for removing gender benders
- Cable Brackets (D1001346) and associated hardware
- Cable Clamps (peek / viton / metal / otherwise) and associated hardware
- Aluminum cable labels (made by G2 earlier in the week)
- Cross brace cable clamp hardware and instructions on how to use them
- Class B fake feedthrough
- 3/8-16 and 1/4-20 bolts of varying lengths

Also, upon reviewing / actually trying to implement the cable path up the BSC-ISI defined in D1101477, we noticed that the launch and land of the cables from Optical Table/Stage 2 to Stage 1 happens rather quickly. I think perhaps there is some confusion as to what is Stage 2 and what is Stage 1 (which is admittedly confusing with the nested structure of the BSC=ISI). First impressions from Rich and I would have guessed that the cable should make the transition from the optical table to running up the side of Stage 2, before making the important jump between isolation stages. As it is shown now, there is lots of slack on the cable, and the probability for rubbing / mechanical shorts are high. Further, though the D1101477 doesn't show it, that area is already crowded with BSC-ISI cables, making routing more difficult than what is shown in the SolidWorks rendering. 

Pictures attached!
Non-image files attached to this report
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