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Analysis of thermal characteristics for EMuS capture solenoids

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Radiation Detection Technology and Methods 2021年第4期5卷 542-549页

作者： Zongtai Xie Guang Zhao Zian Zhu Zhilong Hou Guoqing Zhang Ye Yuan nikolaos vassilopoulos Menglin Wang Feipeng Ning Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China

Purpose The Experimental Muon Source(EMuS)project proposed at the China Spallation Neutron Source(CSNS)is a facility for muon applications and neutrino physics *** EMuS target station adopts a superconducting solenoid scheme to meet the requirements of muon and pion *** capture solenoid consists of four solenoids with different apertures to meet the requirements of the central magnetic field up to *** to the high-irradiation environment,the capture solenoid adopts aluminum-stabilized Rutherford cable winding scheme to reduce the heat deposition on the *** magnet design considers the degradation of properties of aluminum stabilizer after continuous neutral *** to the characteristics of the coil material,the magnet has different steady-state thermal characteristics and quench performance during different operating *** and result Through the analysis of the operating characteristics,this paper proposes the design of the magnet structure and quench protection *** to the simulation,the current design can satisfy a continous operating time of 200 days per year.

关键词： Capture solenoid Aluminum stabilizer Quench Thermal analysis

Mechanical design and analysis of capture superconducting solenoid for EMuS

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Radiation Detection Technology and Methods 2021年第1期5卷 27-32页

作者： Zhilong Hou Ye Yuan Jingyu Tang nikolaos vassilopoulos Guang Zhao Zian Zhu Zongtai Xie Ling Zhao Guoqing Zhang Meifen Wang Accelerator Division Institute of High Energy PhysicsBeijing 100049China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsBeijing 100049China Dongguan Neutron Science Center Institute of High Energy PhysicsDongguan 523803China University of Chinese Academy of Sciences Beijing 100049China

Purpose A capture superconducting solenoid is designed for the Experimental Muon Source(EMuS)which is proposed at China Spallation Neutron Source(CSNS)in Dongguan for muon science and neutrino physics *** capture superconducting solenoid of the EMuS consists of four coils with different radius generating a peak central field of 5 T at 3944 A of nominal *** The aluminum-stabilized NbTi Rutherford cable is used to wind the solenoid *** yokes are arranged for flux returning and field *** alloy Ti-6Al-4V rods are adopted to support the cold *** vacuum vessel of the solenoid is manufactured by 304 stainless *** coils are pre-stressed by interference fits assembly,the outer support cylinder or binding the coils with aluminum alloy wire in order to reduce the peak stress of the *** parameters of the coils such as the thickness and the tensile stress of the binding wire and the thickness of the outer support cylinder have been optimized in order to minimize the cold mass by using FEA *** The maximum stress in the winding is allowable with two layers of 40 mm thickness outer support cylinder through interference fits *** the maximum stress in the winding is allowable with 40 mm thickness of binding wire and 30 mm thickness of outer support *** The method of binding the windings with aluminum alloy wire is suggested to be used to manufacture the *** paper presents the mechanical design and analysis of the capture superconducting solenoid for EMuS.

关键词： EMuS Muon science Superconducting solenoid Coil structure design

Radiation studies for the MOMENT target station

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Chinese Physics C 2016年第12期40卷 120-126页

作者：徐庆年童剑飞 nikolaos vassilopoulos 曹俊何苗侯治龙敬罕涛刘怀民吕晓睿唐靖宇袁野赵光郑阳恒 University of Chinese Academy of Sciences Beijing 100049 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Harbin Institute of Technology Harbin 150001 China

The discovery of the neutrino mixing angle θ13 opens new opportunities for the discovery of leptonic CP violation at high intensity neutrino beams. MOMENT, a future neutrino facility with a high-power proton beam of 15 MW from a continuous-wave linac, is focused on that discovery. The high power of the proton beam causes extreme radiation conditions for the facility and especially for the target station, where the pion capture system of five superconducting solenoids is located. In this paper initial studies are performed for the effects of the radiation on the solenoid structure and the area surrounding it. A concept cooling system is also proposed.

关键词： MOMENT high intensity beam neutrino target station radiation damage

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耐高辐照铝基低温超导卢瑟福电缆研制

低温与超导 2021年第4期49卷 7-10,70页

作者：侯治龙赵玲朱自安袁野唐靖宇 nikolaos vassilopoulos 赵光谢宗泰敬罕涛徐庆金赵裕廖和安陆炳兴中国科学院高能物理研究所北京100049 中国科学院大学北京100049 无锡统力电工股份有限公司无锡214196

中国科学院高能物理研究所提议在中国散裂中子源上建设高性能的实验型缪子源,用于研究缪子科学、中微子物理和下一代高强度缪子、中微子加速器装置的关键技术。俘获超导磁体是实验型缪子源的重要组件之一。俘获磁体在高通量辐照下运行,... 详细信息

中国科学院高能物理研究所提议在中国散裂中子源上建设高性能的实验型缪子源,用于研究缪子科学、中微子物理和下一代高强度缪子、中微子加速器装置的关键技术。俘获超导磁体是实验型缪子源的重要组件之一。俘获磁体在高通量辐照下运行,需要采用耐高辐照的铝基超导卢瑟福电缆绕制线圈。经过上百次的试验,目前成功研制了三根1 500米级的超导电缆,其机械性能和电性能满足俘获磁体需要。

关键词：缪子源超导磁体卢瑟福电缆连续挤压

Red blood cell distribution width in elderly hospitalized patients with cardiovascular disease

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World Journal of Cardiology 2021年第9期13卷 503-513页

作者： Andrew Xanthopoulos Konstantinos Tryposkiadis Apostolos Dimos Angeliki Bourazana Alexandros Zagouras nikolaos Iakovis Michail Papamichalis Grigorios Giamouzis George vassilopoulos John Skoularigis Filippos Triposkiadis Department of Cardiology University Hospital of LarissaLarissa 41110Greece Independent Biostatistician Athens 15669Greece Department of Haematology University of Thessaly Medical SchoolLarissa 41110Greece

BACKGROUND Red blood cell distribution width(RDW)is elevated in patients with cardiovascular disease(CVD).AIM To determine RDW values and impact of CV and non-CV coexisting morbidities in elderly patients hospitalized with chronic *** This prospective study included 204 consecutive elderly patients(age 77.5[7.41]years,female 94[46%],left ventricular ejection fraction 53.00%[37.50,55.00])hospitalized with chronic CVD at the Cardiology Department of Larissa University General Hospital(Larissa,Greece)from January 2019 to April *** patients were selected due to the high prevalence of coexisting morbidities in this patient *** patients with acute CVD(acute coronary syndromes,new-onset heart failure[HF],and acute pericarditis/myocarditis),primary isolated valvular heart disease,sepsis,and those with a history of blood transfusions or cancer were *** evaluation of the patients within 24 h from admission included clinical examination,laboratory blood tests,and *** The most common cardiac morbidities were hypertension and coronary artery disease,with acutely decompensated chronic heart failure(ADCHF)and atrial fibrillation(AF)also frequently being *** most common non-cardiac morbidities were anemia and chronic kidney disease followed by diabetes mellitus,chronic obstructive pulmonary disease,and sleep *** was significantly elevated 15.48(2.15);121(59.3%)of patients had RDW>14.5%which represents the upper limit of normal in our *** associated with RDW in stepwise regression analysis were ADCHF(coefficient:1.406;95%confidence interval[CI]:0.830-1.981;P<0.001),AF(1.192;0.673 to 1.711;P<0.001),and anemia(0.806;0.256 to 1.355;P=0.004).ADCHF was the most significant factor associated with *** was on average 1.41 higher for patients with than without ADCHF,1.19 higher for patients with than without AF,and 0.81 higher for patients with than without *** patients were grouped b

关键词： Red blood cell distribution width Elderly Cardiovascular disease Coexisting morbidities

Feasibility and physics potential of detecting ^(8)B solar neutrinos at JUNO

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Chinese Physics C 2021年第2期45卷 93-110页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Sebastiano Aiello Muhammad Akram Nawab Ali Fengpeng An Guangpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Andrej Babic Wander Baldini Andrea Barresi Eric Baussan Marco Bellato Antonio Bergnoli Enrico Bernieri David Biare Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Max Buesken Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Jinfan Chang Yun Chang Pingping Chen Po-An Chen Shaomin Chen Shenjian Chen Xurong Chen Yi-Wen Chen Yixue Chen Yu Chen Zhang Chen Jie Cheng Yaping Cheng Alexander Chepurnov Davide Chiesa Pietro Chimenti Artem Chukanov Anna Chuvashova Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Salvatore Costa Flavio Dal Corso Christophe De La Taille Jiawei Deng Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Georgy Donchenko Jianmeng Dong Damien Dornic Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Lukas Fajt Donghua Fan Lei Fan Can Fang Jian Fang Marco Fargetta Anna Fatkina Dmitry Fedoseev Vladko Fekete Li-Cheng Feng Qichun Feng Richard Ford Andrey Formozov Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Alexandre Göttel Christoph Genster Marco Giammarchi Agnese Giaz Nunzio Giudice Franco Giuliani Maxim Gonchar Guanghua Gong Hui Gong Oleg Gorchakov Yuri Gornushkin Marco Grassi Christian Grewing Maxim Gromov Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Nunzio Guardone Maria Gul Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yan Yerevan Physics Institute YerevanArmenia UniversitéLibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro RioBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin Institute of Technology HarbinChina University of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing University NanjingChina Guangxi University NanningChina East China University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi’an Jiaotong University Xi’anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of Physics National Chiao-Tung University Hsinchu National United University Miao-Li Department of Physics National T

The Jiangmen Underground Neutrino Observatory(JUNO)features a 20 kt multi-purpose underground liquid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measurements,such as its low-energy threshold,high energy resolution compared with water Cherenkov detectors,and much larger target mass compared with previous liquid scintillator *** this paper,we present a comprehensive assessment of JUNO's potential for detecting^8B solar neutrinos via the neutrino-electron elastic scattering process.A reduced 2 MeV threshold for the recoil electron energy is found to be achievable,assuming that the intrinsic radioactive background^(238)U and^(232)Th in the liquid scintillator can be controlled to 10^(-17)g/*** ten years of data acquisition,approximately 60,000 signal and 30,000 background events are *** large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter,which will shed new light on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation *** m^(2)_(21)=4.8times10^(-5);(7.5times10^(-5))eV^(2),JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3sigma(2sigma)level by measuring the non-zero signal rate variation with respect to the solar zenith ***,JUNO can simultaneously measureDelta m^2_(21)using^8B solar neutrinos to a precision of 20% or better,depending on the central value,and to sub-percent precision using reactor antineutrinos.A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m^2_(21)reported by solar neutrino experiments and the KamLAND experiment.

关键词： neutrino oscillation solar neutrino JUNO