X-ray tubes

Details X-ray tubes X-ray tubes

1979-11-13

1982-08-10

Karlsen, Ernest F.

Electric lamp and discharge devices

With radioactive material

313453, H01J 3500, H01J 2946

Patent

active

043440118

ABSTRACT:
In an X-ray tube comprising a cathode electrode including a filament for emitting electrons and a focusing electrode having a focusing groove adapted to contain the filament, and an anode electrode opposing the cathode electrode and maintained at a high potential which is positive relative to the filament, an electron emitting region of the filament facing the anode electrode is formed as a substantially flat surface, and the filament, the focusing electrode and the anode electrode are arranged such that a portion of the anode electrode upon which electron collide will be positioned in a focal plane of a cathode lens formed by the filament, the focusing electrode and the anode electrode.

REFERENCES:
patent: 2019600 (1935-11-01), Ehrke
Journal of the Japanese Radiation Technical Society, 1977, p. 518.
Sugata, E.; Electron Microscope (2); Published by Ohm Co., 1961, p. 81.
The Encyclopedia of X-Rays and Gamma Rays, Ed. by Clark, G.L., 1968, pp. 1087-1090.

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