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In-beam gamma rays of CSNS Back-n characterized by black resonance filter

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-12页

作者： wang, jin-cheng Ren, jie jiang, Wei Ruan, Xi-Chao liu, Ying-Yi Yang, Hao-Lan xu, Kuo-Zhi Pan, xin-Yi Sun, Qi Bao, jie Huang, Han-Xiong Bai, Hao-Fan Bai, jiang-Bo Cao, Ping chen, Qi-Ping chen, yong-Hao Duan, wen-Hao Fan, An-Chuan Fan, Rui-Rui Feng, Chang-Qing Gu, min-Hao Han, Chang-Cai Han, Zi-jie He, Guo-Zhu He, yong-cheng Hong, Yang Hu, Yi-Wei jiang, Zhi-jie Kang, ling Lan, Chang-lin li, Bo li, Feng li, Qiang li, xiao li, Yang liu, jie liu, Rong liu, shu-Bin liu, Yi-Na Luan, guang-Yuan Ning, Chang-Jun Qiu, Yi-jia Ren, wen-Kai Ren, Zhi-Zhou Song, Zhao-hui Sun, Kang Tan, Zhi-xin Tang, jing-Yu Tang, Sheng-Da wang, li-jiao wang, Peng-cheng wang, Zhao-hui wen, Zhong-Wei Wu, xiao-guang Wu, xuan Wu, Ze-Peng xia, Cong Xie, li-kun Yi, Han Yu, Tao Yu, yong-ji Zhang, Guo-hui Zhang, Hang-Chang Zhang, Qi-Wei Zhang, xian-Peng Zhang, Yu-liang Zhang, Zhi-yong Zhao, Mao-Yuan Zhou, Zhi-Hao Zhu, Ke-Jun Zou, Chong china Inst Atom Energy Key Lab Nucl Data Beijing 102413 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China Spallat Neutron Source Sci Ctr Dongguan 523803 Peoples R China Chinese Acad Sci Inst High Energy Phys State Key Lab Particle Detect & Elect Beijing 100049 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Peking Univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China Fudan Univ Inst Modern Phys Shanghai 200433 Peoples R China Univ Sci & Technol china State Key Lab Particle Detect & Elect Hefei 230026 Peoples R China Univ Sci & Technol china Sch Nucl Sci & Technol Hefei 230026 Peoples R China Univ Sci & Technol china Dept Modern Phys Hefei 230026 Peoples R China china Acad Engn Phys Inst Nucl Phys & Chem Mianyang 621900 Peoples R China Univ Sci & Technol china USTC Archaeometry Lab Hefei 230026 Peoples R China northwest Inst Nucl Technol Xian 710024 Peoples R China Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China Univ Sci & Technol china Inst Adv Technol Hefei 230027 Peoples R China

The back-streaming white-neutron beam{1.ne (Back-n) of the {2. Spallation Neutron Source is an essential neutron- research platform built for the study of nuclear data, neutron physics, and neutron app{1.cations. Many types of cross-sectional neutron-reaction measurements have been performed at Back-n since early 2.1.. These measurements have shown that a significant number of gamma rays can be transmitted to the experimental stations of Back-n along with the neutron beam. These gamma rays, commonly referred to as in-beam gamma rays, can induce a non-neg{1.gible experimental background in neutron-reaction measurements. Studying the characteristics of in-beam gamma rays is important for understanding the experimental background. However, measuring in-beam gamma rays is challenging because most gamma-ray detectors are sensitive to neutrons; thus, discriminating between neutron-induced signals and those from in-beam gamma rays is difficult. In this study, we propose the use of the black resonance filter method and a CeBr3 scintillation detector to measure the characteristics of the in-beam gamma rays of Back-n. Four types of black resonance filters, Ta-1.1. Co-59, Ag-nat, and Cd-nat, were used in this measurement. The time-of-f{1.ght (TOF) technique was used to select the detector signals remaining in the absorption region of the TOF spectra, which were mainly induced by in-beam gamma rays. The energy distribution and flux of the in-beam gamma rays of Back-n were determined by analyzing the deposited energy spectra of the CeBr3 scintillation detector and using Monte Carlo simulations. Based on the results of this study, the background contributions from in-beam gamma rays in neutron-reaction measurements at Back-n can be reasonably evaluated, which is beneficial for enhancing both the experimental methodology and data analysis.

关键词： In-beam gamma rays Back-n Black filter resonance technique In-beam gamma rays Back-n CeBr3 scintillator Black filter resonance technique C6D6 DETECTOR SYSTEM liNE

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1.B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang li li‑jiao wang jing‑Yu Tang xiang‑Biao Qiu Zhen chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei xu Tao li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang xiao‑Yang Sun Qi An Hao‑Fan Bai jiang‑Bo Bai jie Bao Ping Cao Qi‑Ping chen yong‑Hao chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng min‑Hao Gu Chang‑Cai Han Zi‑jie Han Guo‑Zhu He yong‑cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei jiang Zhi‑jie jiang Zheng‑Yao jin ling Kang Bo li Gong li xiao li Yang li jie liu Rong liu shu‑Bin liu Yi‑Na liu guang‑Yuan Luan jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑hui Song Kang Sun Zhi‑xin Tan Sheng‑Da Tang jin‑cheng wang Peng‑cheng wang Zhao‑hui wang Zhong‑Wei wen xiao‑guang Wu xuan Wu Cong xia yong‑ji Yu Guo‑hui Zhang Hang‑Chang Zhang lin‑Hao Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑liang Zhang Yue Zhang Zhi‑yong Zhang Zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China china Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of {1. Beijing 100049China china Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1.80s,particularly considering the {1.mited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the china Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 1.B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1.1.0 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1.1.0 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 1.B doped MCP detector White neutron source Sample nuclide identification

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Study of the response of 1.B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang li li‑jiao wang xiang‑Biao Qiu jing‑wen li Wei xu Tao li Ze‑Bin lin Chang‑Jun Ning yong‑Hao chen Rui‑Rui Fan Kang Sun jing‑Yu Tang Rong Zhang Han‑Tao jing Bo Mei Qi An Hao‑Fan Bai jiang‑Bo Bai jie Bao Ping Cao Qi‑Ping chen Zhen chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao min‑Hao Gu Chang‑Cai Han Zi‑jie Han Guo‑Zhu He yong‑cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei‑Hua jia Hao‑Yu jiang Wei jiang Zhi‑jie jiang Zheng‑Yao jin ling Kang Bo li Chao li Gong li jia‑wen li xiao li Yang li jie liu Rong liu shu‑Bin liu guang‑Yuan Luan Bin‑Bin Qi jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑hui Song Zhi‑xin Tan Sheng‑Da Tang Peng‑cheng wang Zhao‑hui wang Zhong‑Wei wen xiao‑guang Wu xuan Wu li‑kun Xie Yi‑Wei Yang Han Yi yong‑ji Yu Guo‑hui Zhang lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑liang Zhang Yue Zhang Zhi‑yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of {1. Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.1.B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 1. mol%1.B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the china Spallation Neutron *** neutron detection efficiency was calibrated at 1.eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 1. B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 1.B-doped MCP Neutron response Wide-energy range neutrons

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Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang yong-Hao chen jing-Yu Tang Rui-Rui Fan Qiang li Gong li Dong liu Zheng-Yao jin xing-Zhu Cui Tian-xiang chen Yi-Wei Yang Rong liu Han Yi Yang li Zhen Yang Qi An Hao-Fan Bai jiang-Bo Bai jie Bao Ping Cao Qi-Ping chen Zhen chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao min-Hao Gu Chang-Cai Han Zi-jie Han Guo-Zhu He yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua jia Hao-yu jiang Wei jiang Zhi-jie jiang ling Kang Bo li Chao li jia-wen li xiao li jie liu shu-Bin liu guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-hui Song Kang Sun Zhi-xin Tan li-jiao wang Peng-cheng wang Zhao-hui wang Zhong-Wei wen xiao-guang Wu xuan Wu li-kun Xie yong-ji Yu Guo-hui Zhang lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang xian-Peng Zhang Yu-liang Zhang Yue Zhang Zhi-yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of {1. Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-strea{1.g neutron line(Back-n)is a newly built time-of-flight facility at the china Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

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Identification of AtENT3 as the main transporter for uridine uptake in Arabidopsis roots

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Cell Research 2006年第4期16卷 377-388页

作者： kun ling chen~(1,2,*) min xin xu~(2,3,*) guang yong li~(2,3,*) hui liang~2.zong liang xia~(2,3) xin liu~2.ji shu Zhang~1.ai min Zhang~2.dao wen wang~2 ~1.chool of life sciences,northwest agricultural and forestry university,yangling 71.1.0,china ~2Center for Plant Gene Research(Beijing)and the State Kev Laboratory of Plant Cell and Chromosome Engineering,Institute of Genetics and Developmental Biology,Chinese Academy of sciences,Datun Road,Chaovang District,Beijing 100101,china ~3Graduate School of the Chinese Academy of sciences,Yuquan Road,Shijingshan District,Beijing 100039,china Schoolof{1.{2. NorthwestAgriculturalandForestryUniversityYangling712100China andtheStateKeyLaboratoryofPlantCellandChromosomeEngineering InstituteofGeneticsandDevelopmen

Previous studies have shown that Arabidopsis equilibrative nucleoside transporters （AtENTs） possess transport activitieswhen produced in yeast cells and are differentially expressed in Arabidopsis ***,we report further analysis onthe nucleoside transport activities and transcriptional patterns of AtENT *** recombinant proteins of AtENTs3,6,and 7,but not those of AtENTs 1.2.4,and 8,were found to transport thymidine with high *** to previ-ous suggestion that AtENT1.may not transport uridine,this work showed that recombinant AtENT1.was a pH-dependentand high-affinity transporter of *** grown on MS plates,the AtENT3 knockout plants were more tolerant tothe cytotoxic uridine analog 5-fluorouridine than wild-type plants and the knockout plants ofAtENT 1.or ***-sistent with this observation,the AtENT3 knockout line exhibited a significantly decreased ability to take up [3H]uridinevia the roots when compared with wild-type plants and the plants with mutated AtENT 1.or *** indicates thatAtENT3,but not AtENTs 1.and 6,is the main transporter for uridine uptake in Arabidopsis *** transcription ofAtENTs 1.3,4,6,7,and 8 was regulated in a complex manner during leaf development and *** contrast,thesix AtENT members were coordinately induced during seed *** work provides new information on thetransport properties of recombinant AtENT proteins and new clues for future studies of the in vivo transport activitiesand physiological functions of the different ENT proteins in Arabidopsis plants.

关键词： Arabidopsis equilibrative nucleoside transporter expression pattern nucleoside transport functional analysis

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CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed xiaocong ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao jianshe Cao Antoine Chance xuejun Chang Yue Chang Zhe Chang xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin chen Danping chen Fuqing chen Fusan chen Gang chen Guoming chen Hua-xing chen huirun chen jinhui chen ji-Yuan chen Kai chen Mali chen mingjun chen mingshui chen Ning chen Shanhong chen Shanzhen chen Shao-Long chen Shaomin chen Shiqiang chen Tianlu chen Wei chen xiang chen xiaoyu chen xin chen xun chen xurong chen Ye chen Ying chen Yukai chen Zelin chen Zilin chen Gang chen Boping chen Chunhui chen Hok Chuen cheng Huajie cheng Shan cheng Tongguang cheng Yunlong Chi Pietro Chimenti wen Han Chiu Guk Cho ming-Chung Chu xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-Yun Dai xinchen Dai xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong jianin AGH university of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui {1. HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal {1. Beijing Brown university ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china Normal {1. WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china Institute of Atomic Energy Beijing china {1.{2. university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china {1. of Geo{2. Beijing china {1. of Geo{2. WuhanHubei china {1. of {2.ing and Technology XuzhouJiangsu china West Normal {1. NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian {1.zu {2. DalianLiaoning Dalian {1. of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP jiNR) Dubna East china {1. Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by {1.,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV lin... 详细信息

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2.s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2.15)and the Conceptual Design Report(CDR,2.18),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2.2.-2.2.,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2.30s.

关键词： initiated exceeding precise

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基于白光中子源的^(1.7)Au中子辐射俘获截面测量及共振参数分析

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物理学报 2024年第7期73卷 104-113页

作者：罗淏天张奇玮栾广源王晓宇邹翀任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉吴鸿毅顾旻皓余滔解立坤陈永浩安琪白怀勇鲍煜曹平陈昊磊陈琪萍陈裕凯陈朕崔增琪樊瑞睿封常青高可庆韩长材韩子杰何泳成洪杨黄蔚玲黄锡汝季筱璐吉旭阳蒋伟江浩雨姜智杰敬罕涛康玲康明涛李波李超李嘉雯李论李强李晓李样刘荣刘树彬刘星言穆奇丽宁常军齐斌斌任智洲宋英鹏宋朝晖孙虹孙康孙晓阳孙志嘉谭志新唐洪庆唐靖宇唐新懿田斌斌王丽娇王鹏程王琦王涛峰文杰温中伟吴青彪吴晓光吴煊羊奕伟易晗于莉于永积张国辉张林浩张显鹏张玉亮张志永赵豫斌周路平周祖英朱丹阳朱科军朱鹏朱兴华中国原子能科学研究院核数据重点实验室北京102413 中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803 核探测与核电子学国家重点实验室北京100049 中国科学技术大学近代物理系核探测与核电子学国家重点实验室合肥230026 北京大学物理学院核物理与核技术国家重点实验室北京100871 中国工程物理研究院核物理与化学研究所绵阳621900 西北核技术研究院西安710024 中国科学院大学北京100049 中国科学技术大学工程与应用物理系合肥230026 北京航空航天大学物理学院北京100083 华能山东石岛湾核电有限公司荣成264312

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2.探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室... 详细信息

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2.探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室建立了伽马全吸收装置(Gamma total absorption facility,GTAF),该装置用2.块六棱BaF_(2.晶体和1.块五棱BaF_(2.晶体构成了外径2. cm,内径1. cm的球壳,覆盖了95.2.的立体角.利用GTAF在中国散裂中子源Back-n束线上,测量了1.7Au(n,γ)的反应截面数据.测量数据通过能量筛选、PSD方法、晶体多重性筛选进行了初步本底扣除,随后结合对^(nat)C及空样品的测量数据对本底进行了分析及扣除,获得了1.7Au俘获反应的产额,利用SAMMY程序拟合得到了^(1.7)Au在1.1.0 e V的共振能量、中子共振宽度和伽马共振宽度参数.实验测量结果与ENDF/B-VIII.0数据库符合良好,其共振参数存在一定差异,分析原因可能与GTAF能量分辨率、Back-n的中子能谱测量精度、以及实验本底扣除方法相关,这也是下一步工作的重点.

关键词：中子辐射俘获截面共振参数白光中子源伽马全吸收装置

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The first data release(DR1. of the LAMOST regular survey

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Research in Astronomy and Astrophysics 2015年第8期15卷 1095-1124页

作者： A-li Luo yong-Heng Zhao Gang Zhao li-Cai Deng xiao-Wei liu Yi-Peng jing Gang wang Hao-Tong Zhang jian-Rong Shi xiang-Qun Cui Yao-Quan Chu Guo-Ping li Zhong-Rui Bai Yue Wu Yan Cai shu-Yun Cao Zi-Huang Cao Jeffrey L.Carlin Hai-Yuan chen jian-Jun chen kun-xin chen li chen xue-Lei chen xiao-Yan chen Ying chen Norbert Christlieb jia-Ru Chu chen-Zhou Cui Yi-Qiao Dong Bing Du Dong-Wei Fan Lei Feng jian-Ning Fu Peng Gao xue-Fei Gong Bo-Zhong Gu Yan-xin Guo Zhan-wen Han Bo-liang He jin-liang Hou yong-hui Hou wen Hou Hong-Zhuan Hu Ning-Sheng Hu Zhong-wen Hu Zhi-Ying Huo Lei jia Fang-Hua jiang xiang jiang Zhi-Bo jiang Ge jin xiao Kong xu Kong Ya-Juan Lei ai-Hua li Chang-Hua li guang-Wei li Hai-Ning li jian li Qi li shuang li Sha-Sha li xin-Nan li Yan li Yin-Bi li Ye-Ping li Yuan liang Chien-cheng lin Chao liu Gen-Rong liu Guan-Qun liu Zhi-Gang liu wen-Zhi Lu Yu Luo Yin-Dun Mao Heidi Newberg ji-Jun Ni Zhao-xiang Qi yong-Jun Qi Shi-Yin Shen Huo-ming Shi jing Song Yi-Han Song Ding-Qiang Su Hong-Jun Su Zheng-Hong Tang Qing-Sheng Tao Yuan Tian Dan wang Da-Qi wang Feng-Fei wang Guo-min wang Hai wang Hong-Chi wang jian wang jia-Ning wang jian-ling wang jian-Ping wang Jun-xian wang Lei wang Meng-xin wang Shou-Guan wang shu-Qing wang xia wang Ya-Nan wang You wang Yue-Fei wang You-Fen wang Peng Wei ming-Zhi Wei Hong Wu Ke-Fei Wu xue-Bing Wu Yu-Zhong Wu xiao-Zheng xing ling-Zhe xu xin-Qi xu Yan xu Tai-Sheng Yan De-Hua Yang Hai-Feng Yang hui-Qin Yang ming Yang Zheng-Qiu Yao yong Yu hui Yuan Hai-Bo Yuan Hai-Long Yuan Wei-min Yuan Chao Zhai En-Peng Zhang Hua-Wei Zhang jian-Nan Zhang li-Pin Zhang Wei Zhang yong Zhang Yan-xia Zhang Zheng-Chao Zhang ming Zhao Fang Zhou xu Zhou jie Zhu yong-Tian Zhu Si-cheng Zou Fang Zuo National Astronomical Observatories Chinese Academy of Sciences Department of Astronomy Peking University Shanghai Astronomical Observatory Chinese Academy of Sciences Nanjing Institute of Astronomical Optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences university of Science and Technology of {1. Department of Physics Applied Physics and AstronomyRensselaer Polytechnic InstituteTroyNY 12180USA Department of Physics and Astronomy Earlham CollegeRichmondIN 47374USA Universitt Heidelberg Zentrum für AstronomieLandessternwarteKnigstuhl 1269117 HeidelbergGermany Department of Astronomy Beijing Normal University Yunnan Observatories Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

The Large sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST） general survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 1. million spectra of stars, galaxies and QSOs. Objects in both the pilot survey and the first year regular survey are included in the LAMOST DR1. The pilot survey started in October 2.1. and ended in June 2.1., and the data have been released to the public as the LAMOST Pilot Data Release in August 2.1.. The regular survey started in September 2.1., and completed its first year of operation in June 2.1.. The LAMOST DR1.includes a total of 1.02.plates containing 2.955 336 spectra, of which 1.790 879 spectra have observed signalto-noise ratio（SNR） ≥ 1.. All data with SNR ≥ 2.are formally released as LAMOST DR1.under the LAMOST data policy. This data release contains a total of 2.2.4 696 spectra, of which 1.944 32. are stellar spectra, 1. 082.are galaxy spectra and 501. are quasars. The DR1.not only includes spectra, but also three stellar catalogs with measured parameters： late A,FGK-type stars with high quality spectra（1.061.91. entries）, A-type stars（1.0 073 entries）, and M-type stars（1.1.52. entries）. This paper introduces the survey design, the observational and instrumental limitations, data reduction and analysis, and some caveats. A description of the FITS structure of spectral files and parameter catalogs is also provided.

关键词： techniques: spectroscopic survey—data release—catalog

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Measurement of the ^(2.2.Th(n,f)cross section in the 1.2.0 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-Wei Yang yong-Hao chen Rong liu Bang-jiao Ye jie wen Hai-Rui Guo Zi-jie Han Qi-Ping chen Zhong-Wei wen Wei-li Sun Han Yi xing-Yan liu Tao Ye jiang-Bo Bai Qi An jie Bao Yu Bao Ping Cao Hao-Lei chen Zhen chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao xiao-Long Gao min-Hao Gu Chang-Cai Han Guo-Zhu He yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu jiang Wei jiang Zhi-jie jiang Han-Tao jing ling Kang Bo li Chao li jia-wen li Qiang li xiao li Yang li jie liu shu-Bin liu Ze Long guang-Yuan Luan Chang-Jun Ning Meng-chen Niu Bin-Bin Qi jie Ren Xi-Chao Ruan Zhao-hui Song Kang Sun Zhi-jia Sun Zhi-xin Tan jing-Yu Tang xin-Yi Tang Bin-Bin Tian li-jiao wang Peng-cheng wang Zhao-hui wang xiao-guang Wu xuan Wu li-kun Xie xiao-Yun Yang li Yu Tao Yu yong-ji Yu Guo-hui Zhang lin-Hao Zhang Qi-Wei Zhang xian-Peng Zhang Yu-liang Zhang Zhi-yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of {1. Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(2.2.Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(2.2.Th(n,f)cross sec-tion relative to^(2.5)U in the {2.2.0 MeV range was performed at the china Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(2.2.Th and^(2.5)U fission cells were measured in the single-bunch *** 2.2.h/2.5U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2.2. MeV range and 3.6–6.2.for energies in the 2.–2.0 MeV ***^(2.2.Th(n,f)cross section was obtained by introducing the standard cross section of^(2.5)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 2.2.h fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 2.2.h fission resonances were observed in the {2.3 MeV *** present results provide^(2.2.Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 2.2.h(n f)cross section Fast-fission ionization chamber Back-n white neutron source

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Back-n white neutron source at CSNS and its applications

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Nuclear Science and Techniques 2021年第1期32卷 95-104页

作者： jing-Yu Tang Qi An jiang-Bo Bai jie Bao Yu Bao Ping Cao Hao-Lei chen Qi-Ping chen yong-Hao chen Zhen chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao xiao-Long Gao min-Hao Gu Chang-Cai Han Zi-jie Han Guo-Zhu He yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu jiang Wei jiang Zhi-jie jiang Han-Tao jing ling Kang Bo li Chao li jia-wen li Qiang li xiao li Yang li jie liu Rong liu shu-Bin liu xing-Yan liu Ze Long guang-Yuan Luan Chang-Jun Ning Meng-chen Niu Bin-Bin Qi jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-hui Song Kang Sun Zhi-jia Sun Zhi-xin Tan xin-Yi Tang Bin-Bin Tian li-jiao wang Peng-cheng wang Zhao-hui wang Zhong-Wei wen xiao-guang Wu xuan Wu li-kun Xie xiao-Yun Yang Yi-Wei Yang Han Yi li Yu Tao Yu yong-ji Yu Guo-hui Zhang lin-Hao Zhang Qi-Wei Zhang xian-Peng Zhang Yu-liang Zhang Zhi-yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 无 State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of {1. Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China The CSNS Back-n Collaboration

Back-streaming neutrons from the spallation target of the {1. Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March *** Back-n neutron beam is very intense,at approximately 2.1.7 n/cm2.s at 55 m from the target,and has a nominal proton beam with a power of 1.0 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the *** addition,the excellent energy spectrum spanning from 0.5 eV to 2.0 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the *** with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional *** article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn.

关键词： White neutron source Nuclear data measurements Experimental setups Neutron applications

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