Shielding device and method of electron linear accelerator

Abstract

The invention relates to a shielding device and method of an electron linear accelerator. The shielding device of the electron linear accelerator comprises a target radial shield, a tube radial shield, an X-radial outlet shield and a power source inlet shield, wherein the front end of the accelerator is configured in the target radial shield, and a moving block with an X-radial outlet seam is mounted in the target radial shield. An acceleration tube of the accelerator is configured in the tube radial shield, the X-radial outlet shield is configured at the front end of the target radial shield and provided with an outlet opening larger than the X-radial outlet seam, the power source inlet shield is mounted in the position of the tube radial shield corresponding to a power source, and the X-radial outlet shield, the target radial shield and the tube radial shield are sequentially configured integrally and the electron linear accelerator is configured in a space enclosed by them. Thickness and size of various shield parts can be obtained by three-dimensional dosage distribution of X radials obtained according to the Monte Carlo method. The shields can be prevented from being locally too thick or too thin, and extra shields can be effectively reduced or even omitted.

Description

technical field [0001] The present invention relates to the field of accelerator X-ray shielding, in particular to a shielding device and shielding method for an electron linear accelerator (hereinafter referred to as an accelerator). Background technique [0002] In the prior art, a shielding device is provided for the X-rays generated by the accelerator, so that the X-ray leakage radiation level meets the requirements of relevant national standards. There are two main source term parameters related to accelerator shielding design: one is X-ray yield and the other is X-ray energy. The greater the X-ray output and the higher the energy, the more difficult it is to shield. In addition, after the accelerated electrons hit the target, the X-ray yield and energy generated by the X-rays are distributed in three-dimensional space. Therefore, the shielding requirements of different parts are also different. [0003] In the past, shielding designs of accelerators were designed and...

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Problems solved by technology

[0003] In the past, shielding designs of accelerators were designed and calculated by empirical methods. It was difficult to fully consider the X-ray yield and energy in three-dimensional space. In the design, some places were shielded too conservatively, while other places were too conservative. Insufficient shielding, and finally, in order to compensate for the lack of shielding, a large amount of additional shielding has to be added around the periphery of the accelerator

figure 1 (a) and (b) are diagrams based on prior art accelerator shielding devices, such as figure 1 As shown in (a) and (b), the existing accelerator shielding device is not an optimized accelerator shielding device in terms of structure and cost

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