Back-bombardment-preventing electron linear accelerator

Abstract

The invention discloses a back-bombardment-preventing electron linear accelerator, which includes an electron gun, a 270-degree deflection box, a 270-degree deflection magnet and a linear accelerating tube. The central axis of the electron gun and the central axis of the linear accelerating tube are vertical to each other. The linear accelerating tube includes a plurality of coaxially arranged accelerating cavities, and a beam channel II is arranged at the central axis of the linear accelerating tube; the 270-degree deflection magnet is arranged on the outer side of the 270-degree deflection box, and is used for providing a deflection magnetic field with a 270-degree deflection angle to an electron beam located in the 270-degree deflection box; the 270-degree deflection box is arranged between the electron gun and the linear accelerating tube, the inside of the 270-degree deflection box is hollow, the inlet of the 270-degree deflection box is connected with the electron gun, and the output port of the 270-degree deflection box is connected with the inlet of the linear accelerating tube; and a beam channel I in the electron gun, the hollow cavity of the 270-degree deflection box and the beam channel II in the linear accelerating tube mutually communicate, and form a beam track of electron beam motion. The back-bombardment-preventing electron linear accelerator provided by the invention can protect normal work of the electron gun, and prevents damage caused by back bombardment electrons.

Description

technical field [0001] The invention relates to an accelerator, in particular to an anti-return bombardment electron linear accelerator. Background technique [0002] According to the types of charged particles, accelerators can be divided into proton accelerators, heavy ion accelerators and electron accelerators; according to the accelerator structure, they can be divided into synchrotrons, cyclotrons and linear accelerators; according to the acceleration principle, they can be divided into high-voltage accelerators and radio frequency pulse accelerators. [0003] Compared with other types of accelerators, electron linear accelerators have the advantages of simple structure and high energy. With the development of science and technology, the application fields of electron linear accelerators are becoming more and more extensive, such as industrial radiation accelerators, industrial flaw detection accelerators, medical accelerators, and scientific research accelerators. [...

AI Technical Summary

Problems solved by technology

Due to the large energy obtained from the microwave, the speed of the return bombardment electrons is much greater than the speed of the electron gun, so it is very easy to cause the temperature of the cathode to rise, which will affect the life of the cathode or even completely damage it.

For grid-controlled electron guns, back-bombing electrons can easily damage the grid

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