Rotating housing and anode/stationary cathode x-ray tube with ma

Details Rotating housing and anode/stationary cathode x-ray tube with ma Rotating housing and anode/stationary cathode x-ray tube with ma

1992-12-09

1993-12-28

Porta, David P.

X-ray or gamma ray systems or devices

Source

Electron tube

378132, 378136, H01J 3506

Patent

active

052746909

ABSTRACT:
An x-ray tube includes an anode (A) and envelope (C) which are rotated (D) at a relatively high rate of speed. A cathode assembly (B) is supported in the envelope on a bearing (32). In order to hold the cathode assembly stationary, a magnetic susceptor (40) having periodic projections (44) is disposed with the projections closely adjacent an outer peripheral wall (20) of the envelope. A plurality of permanent magnets (52) are mounted on a stationary keeper (50), each magnet adjacent one of the susceptor projections. Preferably, the magnets have alternating polarity such that magnetic flux lines (54) flow between adjacent magnets through the magnetic susceptor.

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