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The pointing camera arm only just clears the skirt at this theta rotation; if it is used to mount a camera, we will need to restrict this motion at el=0.
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The red straps were supplemented with sprung wire tie-downs to the copper tube.
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5 temperature sensors were installed on the cone, three taped to the inside and two in corresponding locations outside. The apex hole sensor can be easily relocated if needed for mounting the secondary monitoring mirrors.
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The hole in the primary is large enough that one can carefully stand on the theta drum and reach up into the entire cone space. This is definitely the way to install the secondary monitoring mirrors.
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Inside DASI looking at the cryostat mount, the apex of the cone is visible, with thermometry, and the 8 fans we installed in the interface plate holes.
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With the fans off, there is a large chimney effect anyway. With them on, they blow a lot of air, but microphonics should be tested with the accelerometer (I didn't have time, but left one down there with Bill).
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The 20 sensors on the primary and 5 on the cone are continuously read to the data archive.
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Oli adding more silicone to reinforce the copper ring
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We installed one of the upper plenum sections before I left. I think the best way of insulating the exposed edge of the primary is a fleece strip (made from blankets?) wrapped into this space.
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