Experimental validation of cold neutron source performance with mesitylene moderator installed at RANS

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-10-17 DOI:10.3233/jnr-220034

Yujiro Ikeda, M. Teshigawara, M. Yan, C. Iwamoto, Kunihiro Fujita, Yutaka Abe, Y. Wakabayashi, A. Taketani, Takaoki Takanashi, M. Harada, T. Hashiguchi, Yutaka Yamagata, Yoshio Matsuzaki, B. Ma, M. Takamura, M. Mizuta, Makoto Goto, S. Ikeda, Tomohiro Kobayashi, Y. Otake

{"title":"Experimental validation of cold neutron source performance with mesitylene moderator installed at RANS","authors":"Yujiro Ikeda, M. Teshigawara, M. Yan, C. Iwamoto, Kunihiro Fujita, Yutaka Abe, Y. Wakabayashi, A. Taketani, Takaoki Takanashi, M. Harada, T. Hashiguchi, Yutaka Yamagata, Yoshio Matsuzaki, B. Ma, M. Takamura, M. Mizuta, Makoto Goto, S. Ikeda, Tomohiro Kobayashi, Y. Otake","doi":"10.3233/jnr-220034","DOIUrl":null,"url":null,"abstract":"The RANS (RIKEN Accelerator driven Neutron Source), one of compact accelerator neutron sources (CANS), tries to expand its performance by installing a cold neutron which may provide new opportunities in many applications. RANS is a low power CANS with a proton beam of 7 MeV and 100 µA at maximum. A moderator system was constructed based on results of optimization design study with mesitylene. Recently, we have done performance tests aiming at showing characteristics as cold neutron source. Cryogenic mesitylene moderator was installed on a plug with a new target moderator reflector configuration of RANS. Experiment using a gas electron multiplier (GEM) detector was carried out to measure neutron spectra of the cold moderator. This paper describes performance of the cold moderator in terms of 1) Cold neutron gain of optimization design with respect to a polyethylene moderator, 2) Temperature dependency of cold neutron spectrum flux regarding scattering kernel (SK), and 3) comparison between experiment and calculation. A note is given for comparison between calculations with different SKs available. Also, two-dimensional imaging of cold and thermal neutron spectrum flux on the viewed surface is shown with a pinhole slit configuration.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3233/jnr-220034","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 1

Abstract

The RANS (RIKEN Accelerator driven Neutron Source), one of compact accelerator neutron sources (CANS), tries to expand its performance by installing a cold neutron which may provide new opportunities in many applications. RANS is a low power CANS with a proton beam of 7 MeV and 100 µA at maximum. A moderator system was constructed based on results of optimization design study with mesitylene. Recently, we have done performance tests aiming at showing characteristics as cold neutron source. Cryogenic mesitylene moderator was installed on a plug with a new target moderator reflector configuration of RANS. Experiment using a gas electron multiplier (GEM) detector was carried out to measure neutron spectra of the cold moderator. This paper describes performance of the cold moderator in terms of 1) Cold neutron gain of optimization design with respect to a polyethylene moderator, 2) Temperature dependency of cold neutron spectrum flux regarding scattering kernel (SK), and 3) comparison between experiment and calculation. A note is given for comparison between calculations with different SKs available. Also, two-dimensional imaging of cold and thermal neutron spectrum flux on the viewed surface is shown with a pinhole slit configuration.

查看原文本刊更多论文

RANS安装均三甲苯慢化剂对冷中子源性能的实验验证

RANS (RIKEN加速器驱动中子源)是紧凑型加速器中子源(can)的一种，它试图通过安装一个冷中子来扩展其性能，这可能为许多应用提供新的机会。RANS是一种低功率can，最大质子束为7 MeV和100 μ a。在优化设计研究结果的基础上，构建了以三聚甲苯为原料的减速剂系统。最近，我们针对冷中子源的特性进行了性能测试。低温三甲减速剂安装在一个插头与新的目标减速剂反射器配置的RANS。利用气电子倍增器(GEM)对冷慢化剂的中子能谱进行了测量。本文从冷中子增益对聚乙烯慢化剂的优化设计、冷中子能谱通量对散射核(SK)的温度依赖性、实验与计算的对比等方面介绍了冷慢化剂的性能。附注用于比较不同可用SKs的计算。此外，在观察表面上的冷中子和热中子能谱通量的二维成像显示为针孔狭缝结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.