X-ray tube

Details X-ray tube X-ray tube

1984-11-21

1986-12-23

Church, Craig E.

X-ray or gamma ray systems or devices

Source

Electron tube

378142, H01J 3506, H01J 3526

Patent

active

046317449

ABSTRACT:
An x-ray tube has a cathode head for focusing an electron beam directed at an anode. The cathode head is made of ferromagnetic material having a Curie point above 700.degree. C. and is mounted on a supporting element to the tube envelope via a direct metallic connection in the form of soldering or welding. The combination of the high Curie point and the direct metallic connection provide good heat transfer such that the Curie point is not exceeded so that the cathode head always remains ferromagnetic. The cathode head thus always operates in a predictable manner and no movement of the focus by magnetic fields occurs.

REFERENCES:
patent: 2686884 (1954-08-01), Atlee
patent: 2839698 (1958-06-01), Bell
patent: 3433955 (1969-03-01), Perry
patent: 3875028 (1975-04-01), Atlee et al.
patent: 3962583 (1976-06-01), Holland et al.
patent: 4184097 (1980-01-01), Auge
Hoselitz, K., Ferromagnetic Properties of Metals and Alloys, Clarendon Press, Oxford, 1952, Table XIV.
German DIN Specification 17 440, "Stainless Steels; Quality Specifications".

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