Electron accelerator

One end of a cylindrical body is connected with a top cover, the other end of the cylindrical body is connected with a base assembly, an accelerating tube is connected to the base assembly in a cylinder body, injected electrons form a high-energy electron beam in the accelerating tube, and the accelerating tube and the cylinder body form a closed space. The insulating structural member comprises an insulating cover and an insulating cylinder, the insulating cover is in close fit with the top cover in the top cover, the insulating cylinder extends into the closed space from the insulating cover, an insulating cavity is defined by the insulating cover and the insulating cylinder, the accelerating tube is arranged in the insulating cavity, and the remaining space between the accelerating tube and the cylinder body is filled with the insulating glue layer. According to the electron accelerator provided by the invention, solid insulation is provided through the combination of the insulating structural member and t