daniel.hoak@LIGO.ORG - posted 16:41, Wednesday 25 January 2012 - last comment - 08:05, Thursday 26 January 2012(2087)
A visit to the TMS-Y
Keita, JohnM, DanH We did some work on the ETMY transmon suspension: clamping cables on the back face, and installing (but not tightening) the cross-braces on the front and back. Pictures attached. Before and after the clamps were applied we noted the values for the OSEMs. Things changed after the clamping, but not too badly; JohnM has the numbers if you're curious. One of the electropolished nuts for the cross-braces was malformed in a strange way, so the back brace is currently held up by seven bolts instead of eight. We noticed there were assemblies of what looked like BOSEM magnets on the suspension's first stage...perhaps for eddy dampers that haven't been installed? We also wanted to assemble some mirror mounts, but we could not find the finely-threaded adjustment screws.
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Note, SUS decided a while ago (and TMS followed suit) that the ECD copper blocks would not be used at this stage. The magnets are still needed on the mass for the weight and balance (and for potential future use of the copper ECDs).