Simulation and design of an IPHI-based neutron source, first steps toward SONATE

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-10-18 DOI:10.3233/jnr-220027

B. Mom, L. Thulliez, Eric Dumonteil, M. Binois, Y. Richet, J. Schwindling, A. Drouart

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引用次数: 1

Abstract

Facilities providing bright thermal neutron beams are of primary importance for various research topics. At CEA-Saclay, a compact accelerator driven neutron source, SONATE, is investigated in taking advantage of the IPHI accelerator able to deliver a 3 MeV proton beam with an intensity up to 100 mA. To optimize the performances of such a neutron source, it is necessary to maximize the thermal neutron flux while minimizing the contribution of other particles. In this work, optimization has been performed using the Monte Carlo code TOUCANS, a neutron transport code based on Geant4 developed at CEA-Saclay. This latter has been coupled to PROMETHEE, a software allowing multi-objective optimization for many simulation software. In this work the Kriging metamodel based approach is used to optimize a neutron beamdump. To take into account the various constraints, noise on the detection system and radiation protection issues, several beamdump configurations are evaluated. The variation of beamdump parameters makes it possible to identify the set of optimal solutions, the Pareto front. It allows to focus on the set of best choices and to choose wisely the best configurations. After describing the validation of TOUCANS on experimental tests performed from 2016 to 2022, the capability of such an approach will be presented.

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基于IPHI的中子源的模拟和设计，迈向SONATE的第一步

提供明亮热中子束的设施对于各种研究主题具有首要重要性。在CEA Saclay，研究了一种紧凑型加速器驱动的中子源SONATE，它利用了IPHI加速器，能够输送强度高达100mA的3MeV质子束。为了优化这种中子源的性能，有必要最大化热中子通量，同时最小化其他粒子的贡献。在这项工作中，使用蒙特卡罗代码TOUCANS进行了优化，这是一种基于CEA Saclay开发的Geant4的中子输运代码。后者与PROMETHEE相耦合，PROMETHEE是一种允许对许多模拟软件进行多目标优化的软件。在这项工作中，基于克里格元模型的方法被用于优化中子束堆。为了考虑各种约束、检测系统上的噪声和辐射防护问题，对几种波束转储配置进行了评估。波束转储参数的变化使得识别最优解集Pareto前沿成为可能。它允许专注于一组最佳选择，并明智地选择最佳配置。在描述了TOUCANS在2016年至2022年进行的实验测试中的验证后，将介绍这种方法的能力。

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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.