Starting aid for an electrodeless high intensity discharge lamp

Details Starting aid for an electrodeless high intensity discharge lamp Starting aid for an electrodeless high intensity discharge lamp

H - Electricity

01

J

H01J 65/04 (2006.01) H01J 61/54 (2006.01) H05B 41/24 (2006.01)

Patent

CA 2056520

LD10,087 ABSTRACT This electrodeless high intensity discharge lamp comprises a light-transmissive arc tube having spaced wall portions of dielectric material and a first gaseous fill within the arc tube. An excitation coil about the arc tube is energizable with RF current effective to develop a toroidal arc discharge in the first gaseous fill upon a dielectric breakdown of the fill. A starting container is joined to the arc tube and has an end wall constituted by one of said arc-tube wall portions. A second gaseous fill within the starting container has a dielectric strength lower than that of the first gaseous fill. For initiating said toroidal arc discharge, we provide means for producing a dielectric breakdown of the gaseous fill within the starting container that develops into an, electric discharge that changes the potential at said end wall in such a manner as to cause a dielectric breakdown of said first gaseous fill.

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