2 results about "Electron gun" patented technology

The invention belongs to the technical field of ultra-pure material preparation, and particularly relates to a multifunctional electron beam zone melting furnace. The multifunctional electron beam zone melting furnace comprises an upper feeding and clamping mechanism 1, a furnace body 2, an electronic gun 3, a vacuum system 4, a rack 5, an electronic gun moving mechanism 6, a lower feeding and clamping mechanism 7, an observation window 8, a control box 9, a high-voltage power supply, an automatic control system and a water cooling system; and the end portion, extending into the furnace body 2, of the upper feeding and clamping mechanism 1 is an upper clamping head, and a to-be-melted bar is clamped at the upper clamping head. The function of synchronous coordinated movement of the gun body and the feeding and clamping mechanism can be achieved, diversification of smelting materials can be achieved, the structure is compact, the requirement for smelting of bars with the diameter of 50mm can be met, the layout is reasonable, and maintenance is convenient.

An electron gun assembly that emits three electron beams, which are arranged in line, toward a phosphor screen includes three cathodes arranged in line, three first grids arranged to face the associated cathodes, and a second grid with an integral structure that is disposed to face a phosphor screen side of the first grids. Each of the first grids is formed of a cup-shaped electrode body having an electron beam passage hole. The electron gun assembly further includes an insulation member through which the three first grids penetrate, the insulation member thus integrally holding the three first grids, a cylindrical member that surrounds the insulation member and has an implant part, and an insulating support member that supports the implant part of the cylindrical member.