X-ray tube window heat shield

Details X-ray tube window heat shield X-ray tube window heat shield

1997-12-19

1999-12-21

Porta, David P.

X-ray or gamma ray systems or devices

Source

Electron tube

378137, 378161, H01J 3518

Patent

active

060059184

ABSTRACT:
An x-ray tube includes an envelope defining an evacuated chamber and having a window transmissive to x-rays. An anode assembly and a cathode assembly operate within the envelope to produce x-rays which travel through the window transmissive to x-rays towards a patient or subject under examination. A shield transmissive to x-rays is coupled to the envelope and positioned such that x-rays traveling through the window transmissive to x-rays must first travel through the shield. The shield prevents substantially all secondary electrons created during the production of x-rays from coming into contact with the window transmissive to x-rays thereby preventing excessive heating of the window transmissive to x-rays. An electrode defined by the envelope in a region proximate the window transmissive to x-rays may additionally or alternatively be used to prevent secondary electrons from reaching the window transmissive to x-rays.

REFERENCES:
patent: 4309637 (1982-01-01), Fetter
patent: 4731804 (1988-03-01), Jenkins
patent: 5128977 (1992-07-01), Danos
patent: 5206895 (1993-04-01), Danos
patent: 5511104 (1996-04-01), Mueller et al.

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