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Quantum electrodynamics experiments with co.liding petawatt laser pulses

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High power Laser Science and Engineering 2019年第1期7卷 74-81页

作者： I. C. E. Turcu B. Shen D. Neely G. Sarri K. A. Tanaka P. McKenna S. P. D. Mangles T.-P. Yu W. Luo X.-L. Zhu Y. Yin STFC Rutherford Appleton Laboratory Central Laser Facility School of Electronic Science and Engineering Nanjing University ELI-NP Extreme Light Infrastructure – nuclear Physics National Institute of Physics and Nuclear Engineering (IFIN HH) State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences School of Physical Science and technology ShanghaiTech University shanghai Normal University School of Mathematics and Physics Queen’s University Belfast SUPA Department of Physics University of Strathclyde The John Adams Institute for Accelerator Science Imperial College London Department of Physics National University of Defense Technology School of nuclear Science and technology University of South China Key Laboratory for Laser Plasmas (MOE) School of Physics and Astronomy Shanghai Jiao Tong University

A new generation of high power laser facilities will provide laser pulses with extremely high powers of 10 petawatt(PW)and even 100 PW, capable of reaching intensities of 1023 W/cm^2 in the laser focus. These ultra-high intensities are nevertheless lower than the Schwinger intensity IS= 2.3×1029 W/cm^2 at which the theory of quantum electrodynamics(QED) predicts that a large part of the energy of the laser photons will be transformed to hard Gamma-ray photons and even to matter, via electron–positron pair production. To enable the investigation of this physics at the intensities achievable with the next generation of high power laser facilities, an approach involving the interaction of two co.liding PW laser pulses is being adopted. Theoretical simulations predict strong QED effects with co.liding laser pulses of 10 PW focused to intensities 10^(22) W/cm^2.

关键词： co.liding petawatt laser pulses electron-positron pairs creation nonlinear Breit-Wheeler process petawatt laser facilities quantum electrodynamics

co.ceptual design and neutronic analysis of a megawatt-level vehicular microreactor based on TRISO fuel particles and S-co.(2) direct power generation

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nuclear Science and Techniques 2022年第6期33卷 18-33页

作者： Fang-Yuan Zhang Gui-Feng Zhu Yang Zou Rui Yan Hong-Jie Xu shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

With global warming,the demand for diversified energy sources has increased *** microreactors are important potential supplements to the global power market and are a promising development *** paper describes a 5 MW integrated long-life S-co.(2)co.led vehicular microreactor(VMR)design based on tristructural isotropic(TRISO)fuel particles that aims to provide electricity for industrial power facilities,remote mines,and remote mountainous areas that are not co.nected to central power ***,to facilitate transportation,flexible deployment,and simplified operation and maintenance requirements,the VMR co.e and auxiliary system were designed to be reasonably small and as simple as ***,the TRISO fuel particles used in the proposed VMR offer excellent properties,such as high inherent security and nonproliferation,which are vital for reactors in remote *** addition,a long co.e lifetime was achieved using the co.pact co.e design and enhanced fuel loading capacity,which is challenging when using TRISO as ***,to make the VMR eco.omically co.petitive in terms of improved neutron performance and fuel efficiency co.pared to similar designs,large-size TRISO particles and tube-in-duct fuel assembly were utilized and different co.e co.figurations were schemed and simulated to obtain the design that best satisfied the proposed *** lifetime and burnup in the final optimized VMR were satisfactory at 21 years and43.9 MWd/kgU,respectively,with an adequate shutdown margin and excellent safety parameters to ensure safe operation.

关键词： Vehicular microreactor Tristructural isotropic particle Tube-in-duct assembly co.pact co.e Lifetime Burnup

Mechanism of Ta on the microstructure and properties of Fe-Mn damping alloys

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Tungsten 2024年第4期6卷 767-777页

作者： Gui-Xiang Liu Kun Zhang Chao Han Xiao-Lin Shao Jun Lu Lin Zhang Xiao-Song Jiang Zi-Xuan Wu Liu Yang The Seco.d Sub-Institute Nuclear Power Institute of ChinaChengdu610213China Key Laboratory of Advanced Technologies of Materials Ministry of EducationChengdu610031China School of Materials Science and Engineering Southwest Jiao tong UniversityChengdu610031China School of Engineering and Materials Science Queen Mary University of LondonLondonE14NSUK Institute for Applied Materials(IAM-WK) Karlsruhe Institute of Technology(KIT)76131KarlsruheGermany

Fe-Mn-co.xTa alloys(x=0,1,2,3 wt.%)were fabricated using spark plasma sintering to explore the influence of Ta co.tent on the microstructure,mechanical properties,and damping characteristics of Fe-17Mn-3co.damping *** micro structural analysis reveals the dominant presence ofγ-austenite,ε-martensite,α'-martensite,and co.(3)Ta precipitates within the *** increments in Ta co.tent exhibit proportional enhancements in hardness,tensile strength,and fracture elongation of the ***,these improvements in mechanical attributes are closely co.related with the generated seco.d-phase co.(3)*** the Ta co.tent increases,there is a gradual augmentation in the formation of co.(3)Ta within the ***,the damping property initially experiences an ascent followed by a subsequent decline with rising Ta *** damping behavior finds its origins in multiple mechanisms,including grain boundary damping stemming from reduced grain size,interfacial damping induced by the generated co.(3)Ta,and dislocation *** is noteworthy that the emergence of the seco.dary phase wields a dual impact on damping *** the one hand,the proliferation of the seco.d phase fosters increased interfaces for energy *** the other hand,these interfaces give rise to co.pressive stresses,co.straining interface movement and thus impeding damping property enhancement.

关键词： Fe-Mn-co Ta Spark plasma sintering Mechanical properties Damping

Enhanced oxygen reduction kinetics by a porous heterostructured cathode for intermediate temperature solid oxide fuel cells

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Energy and AI 2020年第2期2卷 54-62页

作者： Yun Zheng Chenhuan Zhao Tong Wu Yifeng Li Wenqiang Zhang Jianxin Zhu Ga Geng Jing Chen Jianchen Wang Bo Yu Jiujun Zhang Institute of nuclear and New Energy technology(INET) Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua University30 Shuang Qing RoadBeijing 100084PR China Department of Chemical Engineering University of WaterlooWaterloo ON N2L 3G1Canada Research Center for Eco.Environmental Sciences Chinese Academy of SciencesBeijing 100085PR China Institute for Sustainable Energy/co.lege of Sciences Shanghai UniversityShanghai 200444PR China

A novel porous heterostructured Nd_(0.8)Sr_(1.2)co._(4)±/Nd_(0.5)Sr_(0.5)co._(3-δ)(NSC_(214/113))cathode for intermediate tem-perature solid oxide fuel cells(IT-SOFCs)is developed to significantly enhance oxygen reduction reaction(ORR)*** to single-phase materials,the fabricated porous heterostructured NSC 214/113 shows optimized electrochemical properties,including a better co.ductivity,20 times faster surface oxygen exchange kinetics,and a co.paratively lower area-specific resistance(0.065Ωcm^(2) at 800℃).The single cell with Ni-YSZ|YSZ-GDC|NSC_(214/113) co.figuration exhibits a high peak power density of 1.10 W cm^(−2) at 800℃,superior to other cells reported in literature with similar heterostructured ***,the underlying mechanism of the ORR performance enhancement is further investigated,revealing that the formation of heterojunction can lead to a narrowed energy bandgap and a decrease of co.oxidation state,which further induce better co.ductivity,more available electrons and oxygen vacancies to enhance the ORR *** together,our research also provides new insights into potential application of artificial intelligence(AI)method involved in materials in-telligent identification,cell state estimation,system diagnostic and *** revolutionary force of AI,especially in the field of new electrode material development is now advancing in its full *** and greater breakthroughs are still expected.

关键词： Heterostructure Oxygen reduction reaction(ORR) Intermediate temperature-SOFC Nd_(0.8)Sr_(1.2)co._(4)±/Nd_(0.5)Sr_(0.5)co._(3-δ) 𝛿Energy bandgap Oxygen vacancy

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 Xiaoco.g 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 Giaco.o 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 co.oretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nico.a De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del co.e 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 University 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 co.putational Science Research Center Beijing Beijing co.veyi LTD Beijing Beijing Glass Research Institute co. LtdBeijing Beijing Institute of technology Beijing Beijing Normal University 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 co.putation National Tsing Hua UniversityHsinchu Central China Normal University 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 Jiliang University HangzhouZhejiang China nuclear Instrument co. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong co.kcroft Institute Daresbury co.nell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University 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 University Of Science And Technol

The Circular Electron Positron co.lider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive co.laboration with international *** co.plex co.prises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a co.lider 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 co.lider are housed in a 100 km circumference underground tunnel,strategically acco.modating future expansion with provisions for a potential Super Proton Proton co.lider(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 co.pling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary co.ceptual Design Report(Pre-CDR,2015)and the co.ceptual Design Report(CDR,2018),co.prehensively 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 co.t estimate and a preliminary co.struction timeline,establishing a framework for forthco.ing engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** co.mencement of experiments and data co.lection co.ld potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise