Process for ignition of gaseous electrical discharge between ele

Details Process for ignition of gaseous electrical discharge between ele Process for ignition of gaseous electrical discharge between ele

1998-09-14

2000-05-16

Bettendorf, Justin P.

Electric lamp and discharge devices: systems

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

Electron or ion source

31511121, 60202, 250423R, H01J 2702, H05H 124

Patent

active

060641568

ABSTRACT:
The design and manufacturing processes for Hollow Cathode Assemblies (HCA that operate over a broad range of emission currents up to 30 Amperes, at low potentials, with lifetimes in excess of 17,500 hours. The processes include contamination control procedures which cover hollow cathode component cleaning procedures, gas feed system designs and specifications, and hollow cathode activation and operating procedures to thereby produce cathode assemblies that have demonstrated stable and repeatable operating conditions, for both the discharge current and voltage. The HCA of this invention provides lifetimes of greater than 10,000 hours, and expected lifetimes of greater than 17,500 hours, whereas the present state-of-the-art is less than 500 hours at emission currents in excess of 1 Ampere. Stable operation is provided over a large range of operating emission currents, up to a 6:1 ratio, and this HCA can emit electron currents of up to 30 Amperes in magnitude to an external anode that simulates the current drawn to a space plasma, at voltages of less than 20 Volts.

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