X-ray image intensifier tube with an ion pump to maintain a high

Details X-ray image intensifier tube with an ion pump to maintain a high X-ray image intensifier tube with an ion pump to maintain a high

1994-09-20

1996-10-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313 7, H01J 4014

Patent

active

055634079

ABSTRACT:
An X-ray image intensifier incorporates a pair of opposed electrodes and an ion pump within a vacuum vessel. The ion pump supplies a magnetic field to a space between the opposed electrodes. At least one of the opposed electrodes is connected to focusing electrodes in the vacuum vessel. With this structure, the vacuum vessel can be maintained in a high vacuum for a long period of time.

REFERENCES:
patent: 3596123 (1971-07-01), Levin
patent: 3631280 (1971-12-01), Levin
patent: 3675027 (1972-07-01), Tsuda et al.
patent: 4334829 (1982-06-01), Harbaugh
patent: 5194726 (1993-03-01), Jonkman

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