Abstract: In an improved bakeout process for a rotating anode type X-ray tube, the anode, during the course of baking out at temperatures between 500.degree. to 700.degree. C. is rotated by external magnets to prevent cold brazing of the metal lubricant-coated bearing and bearing race.

Abstract: A cellularized radiation sensitive structure is provided in which a laser is utilized to cut narrow slots in a sheet of luminescent material. These slots, usually cut in an X-Y pattern, are then filled with a material which is opaque to either light or radiation or both. This forms a structure having a plurality of individual volumes of luminescent material separated by opaque material. Each of the individual volumes of luminescent material may have associated therewith a photodiode element to produce an electrical signal which is a measure of the light output from that volume.