Electron emission device vacuum sealing method and system based on electron beam welding

The invention provides an electron emission device vacuum sealing method and system based on electron beam welding. The method comprises the steps that a vacuum cavity is divided into an anode cover plate and a cathode cavity; a vacuum sealing joint is arranged to connect the cathode cavity and the anode cover plate; the vacuum sealing joint is of a step structure, a microwave sealing spring is installed on the inner side step end face of one side of the cathode cavity, and a raised edge is arranged; a non-magnetic stainless steel flange is welded on a step on the outer side of a vacuum sealing joint of the anode cover plate and the cathode cavity, a non-magnetic stainless steel surface is used as a sealing surface, a groove is formed in the stainless steel sealing surface on one side of the cathode cavity, and a C-shaped vacuum sealing ring is mounted in the groove; bolts are arranged on the outer side of the non-magnetic stainless steel sealing flange connector, and the stainless steel vacuum sealing surfac