Electron accelerator

An electron accelerator comprises a steel cylinder, a high-frequency transformer, two lines of semi-circular corona rings which are arranged inside the steel cylinder, a high pressure electrode which is arranged on the corona rings, two pieces of high-frequency electrodes which are arranged outside the corona rings and the high pressure electrode, an electron gun which is used to produce and excite electrons with a filament, a vacuum accelerating tube which is arranged under the electron gun, a filament transformer which is electrically connected on the filament and is used to regulate filament voltage and an electron gun filament power supply system which is electrically connected on the filament transformer and is used to supply power to the electron gun, the electron gun filament powersupply system comprises an electromotor which is arranged on the bottom of the steel cylinder and located under the corona rings, a centre rod whose one end portion is connected with an output end ofthe electromotor and an el