Electron gun device for controlling the potential of a body in s

Details Electron gun device for controlling the potential of a body in s Electron gun device for controlling the potential of a body in s

1993-01-14

1994-06-14

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

244158R, H01J 2946, H01J 2956

Patent

active

053213360

ABSTRACT:
The cathode of an electron gun is connected to the body of a space vehicle, performing an automatic limitation (or neutralization) of the negative potential (measured with respect to the physical entity toward which the electron beam is directed, i.e. the anode (A) of the gun, whether this be the environment in which the gun is immersed or a particular object such as a second space vehicle) which the body may assume in the absence of the connection referred to. The aforementioned negative potential is limited or neutralized by means of the extraction of negative charges emitted from the gun (K-E) in the form of an electron beam under appropriate conditions of vacuum. The gun comprises a cathode (K) to be connected to the body (C), at least one accelerating electrode (E), an accelerating voltage generator (G) and a generator (R) for heating the cathode.

REFERENCES:
patent: 3733038 (1973-05-01), Ikrath et al.
patent: 3984730 (1976-10-01), Hunter
patent: 4549113 (1985-10-01), Rao
patent: 4824051 (1989-04-01), Engelking
J. Arnold, "Les Instruments de Mesure a bord du satellit FR-1" Board of Scientific Instruments (Journal of Physics E), ser. 2, vol. 1, No. 9, Sep. 1968 pp. 893-901.
R. H. Levy, "Plasma Radiation Shielding" AIAA Journal, vol. 2, No. 10, Oct. 1964 p. 1836.

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