Wide-energy large-beam-spot electron accelerator

Abstract

The invention relates to a wide-energy large-beam-spot electron accelerator, and the electron accelerator comprises a horizontal light path and a vertical light path; the horizontal light path comprises a linear accelerator, a thin carbon target, a solenoid, a collimator and an alpha magnet which are arranged in sequence, and electron beams emitted by the linear accelerator bombard the thin carbontarget to reduce electron energy. Then the beam current enters the alpha magnet through solenoid focusing and collimator collimation, and the alpha magnet deflects the beam current by 90 degrees to enter a vertical light path; the vertical light path comprises a guide magnet, three quadrupole magnets and a scanning magnet which are arranged in sequence; and a six-pole magnet is arranged between the rear two quadrupole magnets. According to the invention, a scheme of combining the electron linear accelerator with the thin carbon target is adopted, a large electron energy adjustment range can be obtained, a beam spot expansion scheme of one-dimensional beam expansion and one-dimensional scanning is adopted, a large beam spot can be obtained in a limited beam transmission space, the time structure of the beam spot is good, and the density of the beam spot is more uniform.

Description

technical field [0001] The invention relates to the technical field of accelerators, in particular to an electron accelerator with wide energy and large beam spot. Background technique [0002] Electron accelerators are widely used in scientific research, national defense, medical treatment, industrial and agricultural production and other fields. In some application fields, the output electron energy needs to be adjustable in a large range. Electron accelerators using electrostatic high-voltage types have a relatively large adjustment range, but their high-voltage power supplies and accelerating tubes are large in size, making it difficult to install in some applications. At the same time, the electron energy output by electrostatic high-voltage accelerators is limited. [0003] In order to obtain higher electron energies, electron linear accelerators are generally used. However, it is very difficult to adjust the electron energy output by the linear accelerator in a larg...

AI Technical Summary

Problems solved by technology

The advantage of using a scanning magnet is that the beam spot can be easily enlarged, but there is a problem of poor pulse time structure

Using quadrupole magnets to directly expand the beam can solve the problem of pulse time structure, but if the installation space of the accelerator is limited, there will be problems such as difficulty in expanding the two-dimensional beam spot and excessive beam loss

In addition, the energy dispersion of the electron beam output by the electron linear accelerator is relatively large, and it needs to be selected by the deflection magnet, but the distribution of the electron beam spot density after energy selection is distorted in the deflection direction, which is not conducive to the uniformity of the beam spot

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