Discharge device having cathode with micro hollow array

Details Discharge device having cathode with micro hollow array Discharge device having cathode with micro hollow array

H - Electricity

01

J

H01J 61/06 (2006.01) H01J 1/146 (2006.01)

Patent

CA 2565197

A discharge device for operation in a gas at a prescribed pressure includes a cathode having a plurality of micro hollows therein, and an anode spaced from the cathode. Each of the macro hollows has dimensions selected to produce a micro hollow discharge at the prescribed pressure. Preferably, each of the micro hollows has a cross-sectional dimension that is on the order of the mean free path of electrons in the gas. Electrical energy is coupled to the cathode and the anode at a voltage and current for producing micro hollow discharges in each of the micro hollows in the cathode. The discharge device may include a discharge chamber for maintaining the prescribed pressure. A dielectric layer may be disposed on the cathode when the spacing between the cathode and the anode is greater than about the mean free path of electrons in the gas. Applications of the discharge device include fluorescent Lamps, excimer lamps, flat fluorescent light sources, miniature gas lasers, electron sources and ion sources.

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