DEVELOPMENT AND TESTING OF A COMPUTER MODEL OF A SYSTEM FOR FORMING NEUTRON FLUXES ON A LINEAR ELECTRON ACCELERATOR

IF 0.5 Q4 PHYSICS, NUCLEAR

Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI:10.46813/2023-148-168

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

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Abstract

A computer model of the system for forming neutron fluxes at the output of a linear electron accelerator has been developed in the Geant4 programming environment. The system for forming neutron fluxes consists of a monoenergetic neutron source, a graphite reflector, a polyethylene moderator, lead protection and detector. With the help of the model, a number of virtual experiments on 107 primary neutrons were carried out for the energy range of the neutron source from 0.1 to 1.1 MeV. The dependence of the ratio of the number of neutrons falling on the detector with a reflector to the number of neutrons without a reflector is determined, on the energy of the neutron source. Energy spectra of neutrons falling on the detector are determined. It was established that the graphite reflector not only increases the number of particles falling on the detector, but also moderated the energy spectrum of neutrons. The neutron background in the accelerator bunker when using a reflector decreases from 2 to 7 times, depending on the energy of the neutron source.

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开发和测试线性电子加速器中子通量形成系统的计算机模型

在 Geant4 编程环境中开发了一个线性电子加速器输出端中子通量形成系统的计算机模型。中子通量形成系统由一个单能中子源、一个石墨反射器、一个聚乙烯慢化剂、铅保护器和探测器组成。在该模型的帮助下，对 107 个初级中子进行了一系列虚拟实验，中子源的能量范围为 0.1 至 1.1 MeV。确定了落在带有反射器的探测器上的中子数与不带反射器的中子数之比与中子源能量的关系。还测定了落在探测器上的中子的能谱。结果表明，石墨反射器不仅增加了落在探测器上的粒子数量，还缓和了中子的能谱。使用反射器时，加速器掩体中的中子本底会减少 2 到 7 倍，这取决于中子源的能量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Problems of Atomic Science and Technology 物理-核科学技术

CiteScore

0.70

自引率

50.00%

发文量

审稿时长

2-4 weeks

期刊介绍： The journal covers the following topics: Physics of Radiation Effects and Radiation Materials Science; Nuclear Physics Investigations; Plasma Physics; Vacuum, Pure Materials and Superconductors; Plasma Electronics and New Methods of Acceleration.