Patent ID: 6904957

Claim:
A target apparatus comprising: A) a beam pipe; B) a target in the form of a flat ring that intersects said beam pipe, and has an inner diameter; C) a cylindrical retainer connected to and thermally coupled to said inner diameter and also having a retainer inner periphery; D) a first radial array of spaced-apart parallel plate fins disposed about said retainer inner periphery and thermally coupled to said target; E) a cooling mechanism passing through said first radial array of spaced-apart parallel plate fins said cooling mechanism including an outer periphery having a second radial array of spaced-apart parallel plate fins radially disposed about said outer periphery and thermally coupled to and meshing in non-contacting arrangement with said first radial array of spaced-apart parallel plate fins; and F) a mechanism for rotating said target and said first radial array of spaced-apart parallel plate fins with respect to said cooling mechanism and said second array of spaced-apart parallel plate fins.