Solder-coated graphite body for rotary anode of X-ray tube

摘要

The anode (5) rotated about the axis of a vacuum tube (2) attracts electrons emitted from a cathode (4) towards an impact surface (15) on a target (17) of e.g. W-Zr-Mo alloy soldered to the graphite body (16). The impact area is coated with e.g. W:Re for X-ray emission. The target is applied to the body with excess solder which spreads along the wall of the aperture (18) and forms a coating (20) on the rear surface confined by an annular groove (19). This coating reduces emission of heat in the direction of the roller bearings (7,8).