H - Electricity – 01 – J
Patent
H - Electricity
01
J
317/5.96
H01J 37/02 (2006.01) G01N 21/67 (2006.01) H01J 61/00 (2006.01) H01T 1/00 (2006.01)
Patent
CA 1077125
PATENT SPECIFICATION METASTABLE ARGON STABILIZING ARC DEVICES FOR SPECTROSCOPIC ANALYSIS ABSTRACT: A stabilized arc device is disclosed, to produce light for spectroscopic analysis, comprising a housing having a chamber with a first electrode, preferably a cathode, therein; a second electrode, preferably an anode, outside such housing; gas supply means for introducing a stabilizing gas, such as argon, into such chamber; orifice means on such housing forming a discharge orifice connecting with the chamber for discharging a stream of the stabilizing gas from the chamber to the second electrode to stabilize an electrical arc between the first and second electrodes for producing light for spectroscopic ana- lysis; means for introducing a sample material into the are for vaporization by the arc; the first electrode having an opening therein connecting with the chamber and spaced away from such orifice; and means for producing an outward flow of some of the stabilizing gas through such opening in the first electrode and in a direction different from the direction of such stream to cause the are to maintain an electrode spot within the opening in the first electrode. The orifice means may include a conductive nozzle electrode having such discharge orifice therein, and electrically insulating means for insulat- ing such nozzle electrode from the housing and also from the first and second electrodes, whereby the nozzle electrode can assume an intermediate electrical potential between the elect- rical potential of such first and second electrodes. - i -
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