DiffMod–中子传播和慢化的统计2D模拟模型

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-05-10 DOI:10.3233/jnr-220032

U. Rücker, P. Zakalek, Jingjing Li, J. Voigt, T. Gutberlet, T. Brückel

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引用次数: 0

摘要

DiffMod是一个基于扩散、散射、缓和和吸收过程的统计描述的模拟程序，用于模拟脉冲中子源的热靶-慢化剂-反射器组件中中子系综的演化。空间分辨率、能量分辨率和扩散方向都受到严格限制，以使实际减震器-反射器组件的计算时间低于1小时。与蒙特卡罗模拟相比，我们证明了DiffMod方法可以提供的强度和脉冲形状精确到蒙特卡罗模拟的10%以内，而蒙特卡罗模拟需要更多的计算能力。此外，还提供了中子在不同能级上空间分布的时间分辨图。

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DiffMod – statistical 2D simulation model of neutron propagation and moderation

DiffMod is a simulation program for the evolution of a neutron ensemble in a thermal target – moderator – reflector assembly of a pulsed neutron source based on the statistical description of diffusion, scattering, moderation, and absorption processes. The spatial resolution, the energy resolution and the diffusion directions are strongly restricted to achieve calculation times in a realistic moderator – reflector assembly below 1 hour. In comparison with Monte-Carlo simulations describing the geometry and interactions between neutrons and moderator material exactly, we prove that the DiffMod approach can deliver intensities and pulse shapes that are exact within 10% compared to the Monte-Carlo simulations that require much more computing power. In addition, a time-resolved illustration of the spatial distribution of the neutrons at different energy levels is provided.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.