Device and method of starting a long radiation source

Details Device and method of starting a long radiation source Device and method of starting a long radiation source

H - Electricity

01

J

313/125

H01J 61/54 (2006.01) H01J 61/52 (2006.01) H01J 61/82 (2006.01)

Patent

CA 1093628

ABSTRACT The present invention relates to a method and apparatus for starting and maintaining a long electrical arc in an arc chamber containing a few atmospheres of pressure of an ionizable gas. An electrical potential difference is main- tained between two fixed primary electrodes while a short arc is created between the first primary electrode and a pilot electrode, creating ionized gas. The ionized gas is caused to flow towards the second primary electrode thus creating a region of ionized gas be- tween the two primary electrodes, and hence causing a long arc to be struck. This method does not require relative electrode move- ment as was the case previously. Such long electrical arcs have utility as sources of heat and light, particularly light of high intensity.

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