Arc-free electron gun

Details Arc-free electron gun Arc-free electron gun

1999-03-30

2000-05-16

Hoang, Tu Ba

Industrial electric heating furnaces

Electron beam furnace device

Vaporizing furnace

373 14, 21912127, H01J 37305, B23K 1500

Patent

active

060646861

ABSTRACT:
An electron gun that prevents undesirable arcing by providing an improved electrostatic field that generates a confined electron stream, an improved magnetic field that directs the confined electron stream to a crucible with minimal divergence, and an improved insulation on high voltage leads. The improved electrostatic field is provided by a cathode plate disposed adjacent to a filament and forming a cathode window aligned to the filament. An anode plate disposed adjacent to the cathode plate forms an anode window aligned to the cathode window. The cathode plate and anode plate form an electrostatic field and lensing effect that directs electrons emitted from the filament through the cathode and anode windows with minimal divergence. The improved magnetic field is provided by a magnet having a pair of poles, a pair of extension plates each extending from the magnet poles, and a plurality of extension members that extend from the extension plates toward the path of the electron stream. The magnet, pair of extension plates and plurality of extension members provide a uniform magnetic field along the electron stream path to guide the electron stream to the crucible with a minimum of divergence. The improved insulation on high voltage leads is possible because a cooling fluid jacket member forms first channels through which insulated high voltage wires pass that connect to the filament and anode/cathode plates, a second channel through which cooling fluid flows in order to cool the first channels and the wires therein.

REFERENCES:
patent: 2981823 (1961-04-01), Candidus
patent: 3177535 (1965-04-01), Hanks
patent: 3286021 (1966-11-01), Koch
patent: 3535428 (1970-10-01), Hanks
patent: 3582529 (1971-06-01), Anderson et al.
patent: 3710072 (1973-01-01), Shrader et al.
patent: 3801719 (1974-04-01), Pudliner
patent: 3883679 (1975-05-01), Shrader et al.
patent: 4064352 (1977-12-01), Mann
patent: 5111022 (1992-05-01), Harper et al.
patent: 5182488 (1993-01-01), Hill et al.
patent: 5216690 (1993-06-01), Hanks
patent: 5338913 (1994-08-01), Finn et al.
patent: 5418348 (1995-05-01), Tsujimoto et al.
Sales brochure, "Single Crucible Electron Beam Source Model SFIH-270-2", 2 pages.
Sales brochure, "Electron Beam Turret SuperSource Model STIH-270-2M", 4 pages.

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