Patent ID: 6429589
Filing Date: 2002-08-06
Classification: H01J

Abstract:
In a linear beam device, a multi-staged depressed collector comprises:a plurality of electrode stages adapted to have respective electric potentials applied thereto, said plurality of electrode stages being separated from one another by respective electrical insulators, each of said plurality of electrode stages further comprising a respective outer surface; a plurality of channels disposed along said respective outer surfaces of said plurality of electrode stages; a first sleeve disposed in contact with said respective outer surfaces of said electrode stages and substantially enclosing said plurality of channels; a second sleeve enclosing said first sleeve with a space defined therebetween, said first sleeve further having an opening at an end thereof providing an oil communication path between said space and said plurality of channels; and an oil source coupled to said plurality of channels in order to provide a flow of oil therethrough, said plurality of channels providing a direct path for said oil between adjacent ones of said plurality of electrode stages; wherein, said oil provides cooling of said plurality of electrode stages and electrical insulation between said plurality of electrode stages.