X-ray tube having a getter shield and method

Details X-ray tube having a getter shield and method X-ray tube having a getter shield and method

1995-02-09

1996-04-16

Porta, David P.

X-ray or gamma ray systems or devices

Source

Electron tube

378121, H01J 3504

Patent

active

055090451

ABSTRACT:
An x-ray tube (14) has an evacuated envelope (30) in which an anode (32), a cathode (34), and a getter shield (60) are disposed. The shield includes a sleeve (62) and a cap (64). The cap defines an annular groove (70). A getter material (72) is deposited in the groove and sintered to define a porous volume. The getter material is activated during normal exhaustion of the x-ray tube during manufacture. During operation of the tube to generate x-rays, the waste heat is absorbed by the cap passively raising the getter material to its pumping temperature.

REFERENCES:
patent: 2502070 (1950-03-01), Atlee et al.
patent: 3081413 (1963-03-01), Cummings
patent: 5438605 (1995-08-01), Burke et al.

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