The computer model of a neutron fluxes forming system on a linear electron accelerator

IF 0.4 Q4 PHYSICS, NUCLEAR Nuclear Physics and Atomic Energy Pub Date : 2023-12-28 DOI:10.15407/jnpae2023.04.382

S. Gokov, V. M. Horbach, Yu.G. Kazarinov, V.V. Kantemirov, V. I. Kasilov, L.N. Kolpakova, O.A. Lyukhtan, E.V. Tsiats’ko

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Abstract

A computer model of the system for generating neutron fluxes at the output of a linear electron accelerator has been developed in the Geant4 and PhysList QGSP BIC HP programming environment. With the help of the model, a number of virtual experiments on 107 primary neutrons were carried out. The dependence of the ratio of the number of neutrons, incident on the detector with a reflector to the number of neutrons without a reflector on the radius of curvature of the hemispherical dome of the reflector is determined, which makes it possible to establish the optimal dimensions of the working area. The energy spectra of neutrons incident on the detector are determined. It has been established that when using a graphite reflector 30 × 30 × 30 cm in size with a radius of curvature of the hemispherical dome of 5 cm, the number of neutrons at the location of the detector increases by 16.9 %, and the neutron background in the accelerator bunker decreases by 2.5 times, which is in good agreement with the real experiment made. Such a decrease in the radiation background, according to sanitary standards, will make it possible to increase the accelerator current by 2.5 times and increase the neutron flux.

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线性电子加速器中子通量形成系统的计算机模型

在 Geant4 和 PhysList QGSP BIC HP 编程环境中开发了一个在直线电子加速器输出端产生中子通量的系统计算机模型。在该模型的帮助下，对 107 个原生中子进行了多次虚拟实验。确定了入射到带反射器探测器上的中子数与不带反射器探测器上的中子数之比与反射器半球穹顶曲率半径的关系，从而确定了工作区的最佳尺寸。测定了入射到探测器上的中子能谱。结果表明，当使用尺寸为 30 × 30 × 30 厘米、半球穹顶曲率半径为 5 厘米的石墨反射器时，探测器所在位置的中子数量增加了 16.9%，加速器掩体中的中子本底减少了 2.5 倍，这与实际实验结果非常吻合。根据卫生标准，辐射本底的这种减少将使加速器电流增加 2.5 倍，并使中子通量增加。

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来源期刊

Nuclear Physics and Atomic Energy PHYSICS, NUCLEAR-

CiteScore

0.70

自引率

33.30%

发文量

审稿时长

19 weeks

期刊介绍： The journal Nuclear Physics and Atomic Energy presents the publications on Nuclear Physics, Atomic Energy, Radiation Physics, Radioecology, Engineering and Methods of Experiment. The journal includes peer-reviewed articles which are completed works containing new results of theoretical and experimental researches and are of interest for the scientists, postgraduate students, engineers and for the senior students.