Induction heated cathode

Details Induction heated cathode Induction heated cathode

1989-05-02

1991-10-08

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

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

Plasma generating

315 94, 31511121, 315248, 313339, 313356, H01J 724

Patent

active

050557432

ABSTRACT:
An improvement for a vacuum tube or a plasma tube comprises a cathode loop formed of a material suitable for induction heating. A support structure mounted inside the vacuum tube supports the cathode loop at a cathode position. A power supply mounted outside the vacuum tube includes an induction coil wrapped around the tube near the cathode position and generates an alternating electromagnetic field at the cathode position to induce heat in the cathode loop so that electrons are released into the vacuum tube. Finally, a DC bias is applied to the cathode through the support structure. The improved plasma tube with an induction heated cathode is particularly useful for an ion laser gain medium.

REFERENCES:
patent: 2239642 (1941-04-01), Burkhardt et al.
patent: 3509410 (1970-04-01), Banas et al.
patent: 4339691 (1982-07-01), Moriniya et al.
patent: 4812166 (1989-03-01), Saiki et al.
patent: 4818916 (1989-04-01), Morrisroe
patent: 4833294 (1989-05-01), Montaser et al.

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