Support and Cooling

The pixel half-planes will be "L-shaped," with one frame above and one below the beam. Each frame will be movable such that the alignment with respect to the beam is adjustable. In that way, the size of the beam hole will also be adjustable, separately both horizontally and vertically. This will allow us to optimize the balance between radiation damage and physics reach. Smaller hole size gives better vertex resolution, aceptance, tagging efficency, and thus physics reach. The experiment performance can be optimized as experience is gained, both in operating conditions and physics analysis issues. The mechanical supports will be carbon composite structures which will include integrated cooling channels(tubes). These structures will be manufactured by Energy Science Laboratories, Inc. (ESLI) by sandwiching nonporous carbon tubes between two sheets of carbon "flocking," which consists of many individual carbon fibers and looks like velvet material. The "fuzzy carbon" surfaces of this structure will be machined to provide "shingled" surface on which the multichip assemblies will be mounted. This construction allows sensors on one side of the cooling support to overlap, and therefore allows two pixel measurement planes to be mounted on a single cooling support.

Charles Newsom's (U. Iowa) pages
Mechanical Support and Cooling
Roman Pot

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