X-ray tube having rotary anode cooled with high thermal conducti

Details X-ray tube having rotary anode cooled with high thermal conducti X-ray tube having rotary anode cooled with high thermal conducti

1994-01-07

1996-07-30

Porta, David P.

X-ray or gamma ray systems or devices

Source

Electron tube

378133, 378200, H01J 3510

Patent

active

055419755

ABSTRACT:
An X-ray tube rotating anode is cooled with a liquid metal functioning as a recirculated heat exchange fluid and/or a metal film in a gap between the anode and a stationary structure. The liquid metal is confined to the gap by (a) a labyrinth having a coating that is not wetted by the liquid, (b) a magnetic structure, or (c) a wick. The liquid metal recirculated through the anode is cooled in a heat exchanger located either outside the tube or in the tube so it is surrounded by the anode. The heat exchanger in the tube includes a mass of metal in thermal contact with the recirculating liquid metal and including numerous passages for a cooling fluid, e.g. water. A high thermal conductivity path is provided between an anode region bombarded by electrons and a central region of the tube where heat is extracted. In one embodiment the high thermal conductivity is achieved by stacked pyrolytic structures having crystalline axes arranged so there is high heat conductivity radially of the region and lower thermal heat conductivity normal to the high heat conductivity direction.

REFERENCES:
patent: H312 (1987-07-01), Parker
patent: 3694685 (1972-09-01), Houston
patent: 4146815 (1979-03-01), Childeric
patent: 4210371 (1980-07-01), Gerkema et al.
patent: 4625324 (1986-11-01), Blaskis et al.
patent: 4641332 (1987-02-01), Gerkema
patent: 4644577 (1987-02-01), Gerkema et al.
patent: 4677651 (1987-06-01), Hartl et al.
patent: 4856039 (1989-08-01), Roelandse et al.
patent: 5224142 (1993-06-01), Ono et al.

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