Measurement of neutron spectra for various thicknesses of concrete and steel shielding at 24-GeV/c proton beam facility using Bonner sphere spectrometer

IF 1.5 4区工程技术 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Journal of Nuclear Science and Technology Pub Date : 2023-10-26 DOI:10.1080/00223131.2023.2274933

Tetsuro Matsumoto, Akihiko Masuda, Eunji Lee, Toshiya Sanami, Takahiro Oyama, Tsuyoshi Kajimoto, Noriaki Nakao, Hiroshi Yashima, Seiji Nagaguro, Yoshitomo Uwamino, Seiya Manabe, Nobuhiro Shigyo, Hideki Harano, Robert Froeschl, Elpida Iliopoulou, Angelo Infantino, Stefan Roesler, Markus Brugger

{"title":"Measurement of neutron spectra for various thicknesses of concrete and steel shielding at 24-GeV/c proton beam facility using Bonner sphere spectrometer","authors":"Tetsuro Matsumoto, Akihiko Masuda, Eunji Lee, Toshiya Sanami, Takahiro Oyama, Tsuyoshi Kajimoto, Noriaki Nakao, Hiroshi Yashima, Seiji Nagaguro, Yoshitomo Uwamino, Seiya Manabe, Nobuhiro Shigyo, Hideki Harano, Robert Froeschl, Elpida Iliopoulou, Angelo Infantino, Stefan Roesler, Markus Brugger","doi":"10.1080/00223131.2023.2274933","DOIUrl":null,"url":null,"abstract":"ABSTRACTNeutron energy spectra down to thermal energy were measured using a Bonner sphere spectrometer (BSS) for various thicknesses of concrete and steel shielding at the CERN/CHARM facility, where high-energy neutrons were produced by 24-GeV/c protons incident on a thick copper target. The thicknesses of the concrete and steel shielding blocks ranged from 40 cm to 200 cm and from 20 cm to 80 cm, respectively. The BSS consisted of a spherical 3He proportional counter and five polyethylene moderators with diameters of 7.62 cm, 10.2 cm, 12.7 cm, 17.8 cm, and 24.1 cm, respectively. In addition, polyethylene moderators combined with a lead or copper inner shell were used to increase the sensitivity to high-energy neutrons. The neutron energy spectra were deduced using an unfolding method. The initial guesses were obtained using the PHITS code for each experimental geometry. The response function for the BSS was determined using the MCNP6.2 code with JENDL-4.0/HE. The neutron energy spectra over the entire energy region from 10−4 eV to 10 GeV were successfully obtained for the different shielding conditions. The validity of the response function and the contribution of each moderator are discussed referring to previous studies and tests at the standard neutron fields of AIST.KEYWORDS: Neutronsconcrete shieldingsteel shieldinghigh-energy neutronsBonner sphere spectrometerunfoldingDisclaimerAs a service to authors and researchers we are providing this version of an accepted manuscript (AM). Copyediting, typesetting, and review of the resulting proofs will be undertaken on this manuscript before final publication of the Version of Record (VoR). During production and pre-press, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal relate to these versions also. Additional informationFundingThis study was supported by the Tsukuba Innovation Arena (TIA) collaborative research program “Kakehashi”.","PeriodicalId":16526,"journal":{"name":"Journal of Nuclear Science and Technology","volume":"60 8","pages":"0"},"PeriodicalIF":1.5000,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/00223131.2023.2274933","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

ABSTRACTNeutron energy spectra down to thermal energy were measured using a Bonner sphere spectrometer (BSS) for various thicknesses of concrete and steel shielding at the CERN/CHARM facility, where high-energy neutrons were produced by 24-GeV/c protons incident on a thick copper target. The thicknesses of the concrete and steel shielding blocks ranged from 40 cm to 200 cm and from 20 cm to 80 cm, respectively. The BSS consisted of a spherical 3He proportional counter and five polyethylene moderators with diameters of 7.62 cm, 10.2 cm, 12.7 cm, 17.8 cm, and 24.1 cm, respectively. In addition, polyethylene moderators combined with a lead or copper inner shell were used to increase the sensitivity to high-energy neutrons. The neutron energy spectra were deduced using an unfolding method. The initial guesses were obtained using the PHITS code for each experimental geometry. The response function for the BSS was determined using the MCNP6.2 code with JENDL-4.0/HE. The neutron energy spectra over the entire energy region from 10−4 eV to 10 GeV were successfully obtained for the different shielding conditions. The validity of the response function and the contribution of each moderator are discussed referring to previous studies and tests at the standard neutron fields of AIST.KEYWORDS: Neutronsconcrete shieldingsteel shieldinghigh-energy neutronsBonner sphere spectrometerunfoldingDisclaimerAs a service to authors and researchers we are providing this version of an accepted manuscript (AM). Copyediting, typesetting, and review of the resulting proofs will be undertaken on this manuscript before final publication of the Version of Record (VoR). During production and pre-press, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal relate to these versions also. Additional informationFundingThis study was supported by the Tsukuba Innovation Arena (TIA) collaborative research program “Kakehashi”.

查看原文本刊更多论文

用邦纳球谱仪测量24 gev /c质子束装置中不同厚度混凝土和钢屏蔽层的中子能谱

在CERN/CHARM装置上，用24gev /c质子撞击厚铜靶产生高能中子，利用Bonner球谱仪(BSS)测量了不同厚度的混凝土和钢屏蔽层的中子能谱至热能。混凝土屏蔽块厚度为40 ~ 200 cm，钢屏蔽块厚度为20 ~ 80 cm。BSS由一个球形3He比例计数器和5个直径分别为7.62 cm、10.2 cm、12.7 cm、17.8 cm和24.1 cm的聚乙烯缓和剂组成。此外，聚乙烯减速剂与铅或铜的内壳相结合，以提高对高能中子的灵敏度。用展开法推导了中子能谱。使用PHITS代码对每个实验几何图形进行初始猜测。采用JENDL-4.0/HE的MCNP6.2代码确定BSS的响应函数。在不同的屏蔽条件下，成功地获得了从10−4 eV到10 GeV的整个能量区域的中子能谱。参考前人在AIST标准中子场的研究和试验，讨论了响应函数的有效性和各慢化剂的贡献。关键词:中子，混凝土屏蔽，钢屏蔽，高能中子，邦纳球光谱仪，展开免责声明作为对作者和研究人员的服务，我们提供这个版本的接受稿件(AM)。在最终出版版本记录(VoR)之前，将对该手稿进行编辑、排版和审查。在制作和印前，可能会发现可能影响内容的错误，所有适用于期刊的法律免责声明也与这些版本有关。本研究得到筑波创新竞技场(TIA)合作研究项目“Kakehashi”的支持。

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

Journal of Nuclear Science and Technology 工程技术-核科学技术

CiteScore

2.40

自引率

16.70%

发文量

116

审稿时长

2.3 months

期刊介绍： The Journal of Nuclear Science and Technology (JNST) publishes internationally peer-reviewed papers that contribute to the exchange of research, ideas and developments in the field of nuclear science and technology, to contribute peaceful and sustainable development of the World. JNST ’s broad scope covers a wide range of topics within its subject category, including but are not limited to: General Issues related to Nuclear Power Utilization: Philosophy and Ethics, Justice and Policy, International Relation, Economical and Sociological Aspects, Environmental Aspects, Education, Documentation and Database, Nuclear Non-Proliferation, Safeguard Radiation, Accelerator and Beam Technologies: Nuclear Physics, Nuclear Reaction for Engineering, Nuclear Data Measurement and Evaluation, Integral Verification/Validation and Benchmark on Nuclear Data, Radiation Behaviors and Shielding, Radiation Physics, Radiation Detection and Measurement, Accelerator and Beam Technology, Synchrotron Radiation, Medical Reactor and Accelerator, Neutron Source, Neutron Technology Nuclear Reactor Physics: Reactor Physics Experiments, Reactor Neutronics Design and Evaluation, Reactor Analysis, Neutron Transport Calculation, Reactor Dynamics Experiment, Nuclear Criticality Safety, Fuel Burnup and Nuclear Transmutation, Reactor Instrumentation and Control, Human-Machine System: Reactor Instrumentation and Control System, Human Factor, Control Room and Operator Interface Design, Remote Control, Robotics, Image Processing Thermal Hydraulics: Thermal Hydraulic Experiment and Analysis, Thermal Hydraulic Design, Thermal Hydraulics of Single/Two/Multi Phase Flow, Interactive Phenomena with Fluid, Measurement Technology...etc.