Patent ID: 6376972
Filing Date: 2002-04-23
Classification: H01J,H01S

Abstract:
A glow discharge lamp comprising:coaxial inner and outer tubes; an anode electrode substantially in the shape of a cylindrical tumbler having an interior cavity, the anode coaxially covering one end of the outer tube, the inner tube penetrating and extending through the anode; a cathode electrode substantially in the shape of a cylindrical tumbler having an interior cavity, the cathode being located within the outer tube at the outer tube end distal from the anode, the cathode further having an end which is inserted into the inner tube, with the inner and outer tubes, the cathode and the anode defining a working gas cavity; means for connecting the inner and outer tubes, the cathode and the anode so that the working gas cavity is a hermetically sealed cavity; and working gas, capable of being ionized, substantially filling the working gas cavity.