Electric lamp and discharge devices: systems – Discharge device load with fluent material supply to the... – Plasma generating
Patent
1989-09-13
1991-12-24
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device load with fluent material supply to the...
Plasma generating
31511181, 31323131, 250423R, H05H 124
Patent
active
050755943
ABSTRACT:
A hollow cathode capable of self-heating by back ion bombardment to a thermionic emission temperature axially discharges therefrom an ionized plasma of an ambient gas such as xenon. Electrons are axially or radially extractable from the plasma by an anode. A voltage is applied to a keeper electrode disposed between the cathode and anode to sustain plasma discharge of the gas between the cathode and keeper electrode. A control electrode is disposed between the keeper electrode and the anode. Application of a positive voltage (relative to the cathode) to the control electrode causes the plasma discharge to extend from the cathode to the anode, thus closing the switch. Application of a negative control electrode voltage, or simply returning the control electrode to cathode potential, causes the plasma discharge to retract back to the area of the keeper electrode, thereby opening the switch.
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Poeschel Robert L.
Schumacher Robert W.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
LaRoche Eugene R.
Yoo Do Hyun
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