Plasma generating device with hairpin-shaped cathode filaments

Details Plasma generating device with hairpin-shaped cathode filaments Plasma generating device with hairpin-shaped cathode filaments

1977-06-01

1979-02-20

Demeo, Palmer C.

Electric lamp and discharge devices: systems

Discharge device load with fluent material supply to the...

Plasma generating

313155, 313161, 3132314, 313362, H01J 724, H05H 100

Patent

active

041409434

ABSTRACT:
A device for generating a homogeneous ion-electron plasma from which a large ion beam can be extracted. The device utilizes hairpin-shaped filaments lining at least portions of the wall of the chamber which have been rotated 90 degrees from prior known approaches. This provides a very significant result in that the DC current flowing through the filaments produces a small solenoidal magnetic field that impedes the emitted electrons from striking the walls of the chamber, which may be of a cylindrical or rectangular configuration. This improves the efficiency of the ion source and provides additional space for more filaments, while providing a very uniform plasma density profile which is noise-free.

REFERENCES:
patent: 3156090 (1964-11-01), Kaufman
patent: 3551828 (1970-12-01), Stengel
patent: 3760225 (1973-09-01), Ehlers et al.
patent: 3969646 (1976-07-01), Reader et al.

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