Discharge lamp of the water cooled type

Details Discharge lamp of the water cooled type Discharge lamp of the water cooled type

H - Electricity

01

J

H01J 61/52 (2006.01) H01J 61/073 (2006.01)

Patent

CA 2154615

A discharge lamp has a water-cooled anode that achieves advantageous cooling. A tungsten tip piece is directly connected to a tip of a body element of the anode that is formed of copper and has a water-cooling arrangement therein. A maximum outer diameter of the tungsten tip piece is approximately equal to an outer diameter D of the body element, and the relationship between the outer diameter D and the thickness L of the tungsten tip piece is 0.2 L/D 0.5. In accordance with a preferred embodiment, the tungsten tip piece is directly connected to a tip of a cylindrical body element inside of which a cooling-water feed tube is arranged to extend coaxially with the body element. Cooling water is fedfrom a base of this cooling-water feed tube, along the cooling-water feed tube, strikes an inner side of the tip end of the body element, finally is conveyed through a gap between an inner side of the body element and an outer side of the cooling- water feed tube, which serves as a cooling-water drainage duct. Preferably, the tungsten tip piece has the shape of a truncated cone having a maximum outer diameter approximately equal to the outer diameter D of the body element, and a thickness extending in a lengthwise direction of the body element.

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