X-ray or gamma ray systems or devices – Source – Electron tube
Patent
1998-08-21
2000-10-17
Hajec, Donald
X-ray or gamma ray systems or devices
Source
Electron tube
378141, 378203, H01J 3500
Patent
active
061342998
ABSTRACT:
Air cooled x-ray generating apparatus is provided with a unitary vacuum enclosure having a rotating anode target and a cathode assembly for generating x-rays. The cathode assembly may be placed within the vacuum enclosure through an opening in the top wall thereof, and comprises a disk which completely covers this opening. The unitary vacuum enclosure and the disk form a radiation shield. A plurality of fins are disposed on the exterior side wall of the vacuum enclosure, and a shroud is attached to the fins to provide additional protection of ambient against radiation. The cathode assembly may be placed through a side wall of the vacuum enclosure. The additional protection against excessive radiation in this design is provided by a shielding member placed in proximity to the anode target. The shielding member extends from the side wall of the enclosure and is substantially parallel to the top wall.
REFERENCES:
patent: 4841557 (1989-06-01), Haberrecker et al.
patent: 4928296 (1990-05-01), Kadambi
patent: 5056126 (1991-10-01), Klostermann et al.
Felten Daniel S.
Fishman Bella
Friedman Bradford L.
Hajec Donald
Varian Medical Systems
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