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Acta Metallurgica Sinica(English Letters) 2008年第3期21卷 205-210页

作者： q.f. zhu z.h. zhao j.z. cui y.b. zuo f. qu Key Laboratory of.Electromagnetic Processing of.Materials Ministry of Education Northeastern Univer- sity Shenyang 110004 China

The inf.uences of.the low f.equency electromagnetic f.eld on the horizontal direct chill casting process were investigated experimentally. Ingots of.2024 aluminum alloy with a cross size of.40 mm× 200 mm were produced by the conventional horizontal chill casting process and low f.equency electromagnetic horizontal chill casting processre- spectively. The as-cast structures and the mechanical property of.the ingots were examined. The results showed that the low f.equency electromagnetic f.eld could sub- stantially ref.ne the microstructures and pronouncedly reduce the macrosegregation in the horizontal direct chill casting process. Moreover, the surf.ce quality of.the ingot was prominently improved by the low f.equency electromagnetic f.eld. The f.acture strength and elongation percentage of.the ingot was increased with the low f.equency electromagnetic f.eld.

关键词： horizontal direct chill casting Low f.equency electromagnetic f.eld 2024 aluminum alloy Microstructures Macrosegregation

Ef.ects of.chemical pressure on diluted magneticsemiconductor(ba,K)(zn,Mn)_2As_2

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Chinese Physics b 2019年第5期28卷 288-292页

作者： y Peng S yu G q zhao W M Li j f.zhao L P Cao X C Wang q q Liu S j.z.ang R z yu z Deng X h zhu C q jin College of.Materials Science & Engineering Sichuan University beijing National Laboratory f.r Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences School of.Physics University of Chinese Academy of Sciences Collaborative Innovation Center of.quantum Matter

Chemical pressure induced by iso-valent doping has been widely employed to tune physical properties of.materials. In this work, we report ef.ects of.chemical pressure by substitution of.Sb or P into As on a recently discovered diluted magnetic semiconductor(ba,K)(zn,Mn)_2 As_2, which has the record of.reliable Curie temperature of.230 K due to independent charge and spin doping. Sb and P are substituted into As-site to produce negative and positive chemical pressures, respectively.X-ray dif.raction results demonstrate the successf.l chemical solution of.dopants. Magnetic properties of.both K-underdoped and K-optimal-doped samples are ef.ectively tuned by Sb-and P-doping. The hall ef.ect measurements do not show decrease in carrier concentrations upon Sb-and P-doping. Impressively, magnetoresistance is signif.cantly improved f.om7% to 27% by only 10% P-doping, successf.lly extending potential application of.ba,K)(zn,Mn)_2 As_2.

关键词： chemical pressure (ba,K)(zn,Mn)2As2 diluted magnetic semiconductor iso-valent doping

The Lobster Eye Imager f.r Astronomy Onboard the SATech-01 Satellite

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Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： z.X.Ling X.j.Sun C.zhang S.L.Sun G.jin S.N.zhang X.f.zhang j.b.Chang f.S.Chen y.f.Chen z.W.Cheng W.f. y.X.han h.Li j.f.Li y.Li z.D.Li P.R.Liu y.h.Lv X.h.Ma y.j.Tang C.b.Wang R.j.Xie y.L.Xue A.L.yan q.zhang C.y.b.o h.b.Cai h.q.Cheng C.z.cui y.f.Dai D.W.f.n h.b.hu j.W.hu M.h.huang z.q.jia C.C.jin D.y.Li j.q.Li h.y.Liu M.j.Liu y.Liu h.W.Pan y.L.qiu M.Sugizaki h.Sun W.X.Wang y.L.Wang q.y.Wu X.P.Xu y.f.Xu h.N.yang X.yang b.zhang M.zhang W.D.zhang z.zhang D.h.zhao X.q.Cong b.W.jiang L.h.Li X.b.qiu j.N.Sun D.T.Su j.Wang C.Wu z.Xu X.M.yang S.K.zhang z.zhang N.zhang y.f.zhu h.y.b.n X.z.bi z.M.Cai W.Chen X.Chen y.h.Chen y.cui X.L.Duan z.G f.ng y.Gao j.W.he T.he j.j.huang f.Li j.S.Li T.j.Li T.T.Li h.q.Liu L.Liu R.Liu S.Liu N.Meng q.Shi A.T.Sun y.M.Wang y.b.Wang h.C.Wu D.X Xu y.q yang y.yang X.S.yu K.X.zhang y.L.zhang y.h.zhang y.T.zhang h.zhou X.C.zhu j.S.Cheng L.qin L.Wang q.L.Wang M.bai R.L.Gao z.ji y.R.Liu f.L.Ma y.j.Shi j.Su y.y.Tan j.z.Tong h.T.Xu C.b.Xue G.f.Xue W.yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of.Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute of.Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology Co. LTDNanjing 211106China Institute of.high Energy Physics Chinese Academy of SciencesBeijing 100049China Science and Technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy f.r Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of.Electrical Engineering Chinese Academy of ScienceBeijing 100190China National Space Science Center Chinese Academy of ScienceBeijing 100190China

The Lobster Eye Imager f.r Astronomy(LEIA),a pathf.nder of.the Wide-f.eld X-ray Telescope of.the Einstein Probe mission,was successf.lly launched onboard the SATech-01 satellite of.the Chinese Academy of.Sciences on2022 july *** this paper,we introduce the design and on-ground test results of.the LEIA *** stateof.the-art Micro-Pore Optics(MPO),a wide f.eld of.view of.346 square degrees(18.6°×18.6°)of.the X-ray imager is *** optical assembly composed of.36 MPO chips is used to f.cus incident X-ray photons,and f.ur large-f.rmat complementary metal-oxide semiconductor(CMOS)sensors,each of.size 6 cm×6 cm,are used as the f.cal plane *** instrument has an angular resolution of.4’-8’(in terms of.f.hM)f.r the central f.cal spot of.the point-spread f.nction,and an ef.ective area of.2-3 cm^(2) at 1 keV in essentially all the directions within the f.eld of.*** detection passband is 0.5-4 keV in sof. X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of.LEIA is 56 kg and the power is 85 *** satellite,with a design lif.time of.2 yr,operates in a Sun-synchronous orbit of.500 km with an orbital period of.95 *** is paving the way f.r f.ture missions by verif.ing in f.ight the technologies of.both novel f.cusing imaging optics and CMOS sensors f.r X-ray observation,and by optimizing the working setups of.the instrumental *** addition,LEIA is able to carry out scientif.c observations to f.nd new transients and to monitor known sources in the sof. X-ray.b.nd,albeit with limited usef.l observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

Geometrical reconstruction of.f.uorescence events observed by the LhAASO experiment

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Chinese Physics C 2021年第4期45卷 416-425页

作者： f.Aharonian q.An Axikegu L.X.bai y.X.bai y.W.bao D.bastieri X.j.bi y.j.bi h.Cai j.T.Cai z.Cao z.Cao j.Chang j.f.Chang X.C.Chang b.M.Chen j.Chen L.Chen L.Chen L.Chen M.j.Chen M.L.Chen q.h.Chen S.h.Chen S.z.Chen T.L.Chen X.L.Chen y.Chen N.Cheng y.D.Cheng S.W.cui X.h.cui y.D.cui b.z.Dai h.L.Dai z.G.Dai Danzengluobu D.della Volpe b.DEtorre Piazzoli X.j.Dong j.h.f.n y.z.f.n z.X.f.n j.f.ng j.f.ng C.f.f.ng L.f.ng S.h.f.ng y.L.f.ng b.Gao C.D.Gao q.Gao W.Gao M.M.Ge L.S.Geng G.h.Gong q.b.Gou M.h.Gu j.G.Guo X.L.Guo y.q.Guo y.y.Guo y.A.han h.h.he h.N.he j.C.he S.L.he X.b.he y.he M.heller y.K.hor C.hou X.hou h.b.hu S.hu S.C.hu X.j.hu D.h.huang q.L.huang W.h.huang X.T.huang z.C.huang f.ji X.L.ji h.y.jia K.jiang z.j.jiang C.jin D.Kuleshov K.Levochkin b.b.Li C.Li C.Li f.Li h.b.Li h.C.Li h.y.Li j.Li K.Li W.L.Li X.Li X.Li X.R.Li y.Li y.z.Li z.Li z.Li E.W.Liang y.f.Liang S.j.Lin b.Liu C.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.L.Liu j.S.Liu j.y.Liu M.y.Liu R.y.Liu S.M.Liu W.Liu y.N.Liu z.X.Liu W.j.Long R.Lu h.K.Lv b.q.Ma L.L.Ma X.h.Ma j.R.Mao A.Masood W.Mitthumsiri T.Montaruli y.C.Nan b.y..Pang P.Pattarakijwanich z.y.Pei M.y.qi D.Ruf.olo V.Rulev A.Saiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi h.C.Song yu.V.Stenkin V.Stepanov q.N.Sun X.N.Sun z.b.Sun P.h.T.Tam z.b.Tang W.W.Tian b.D.Wang C.Wang h.Wang h.G.Wang j.C.Wang j.S.Wang L.P.Wang L.y.Wang R.N.Wang W.Wang W.Wang X.G.Wang X.j.Wang X.y.Wang y.D.Wang y.j.Wang y.P.Wang z.Wang z.Wang z.h.Wang z.X.Wang D.M.Wei j.j.Wei y.j.Wei T.Wen C.y.Wu h.R.Wu S.Wu W.X.Wu X.f.Wu S.q.Xi j.Xia j.j.Xia G.M.Xiang G.Xiao h.b.Xiao G.G.Xin y.L.Xin y.Xing D.L.Xu R.X.Xu L.Xue D.h.yan C.W.yang f.f.yang j.y.yang L.L.yang M.j.yang R.z.yang S.b.yang y.h.yao z.G.yao y.M.ye L.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.D.zeng T.X.zeng W.zeng z.K.zeng M.zha X.X.zhai b.b.zhang h.M.zhang h.y.zhang j.L.zhang j.W.zhang L.zhang L.zhang L.X.zhang P.f.zhang P.f.zhang R.zhang S.R.zhang S.S.zhang X.zhang X.P.zhang y.zhang y.zhang y.f.zhang y.L.zhang b.zhao j.zhao L.zhao L.z.zhao S.P.zhao f.zheng y.zheng b.zhou h.zhou j.N.zhou P Key Laboratory of.Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of.Chinese Academy of.Sciences Beijing 100049China TIANf. Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of.Paricle Detection and Electronics China University of.Science and Technology of.China HefeiAnhui 230026China Department of.Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of.Physics Peking UniversityBeijing 100871China Center f.r Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China School of.Physics and Astronomy&School of.Physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China School of.Physical Science and Technology Guangxi UniversityNanningGuangxi 530004China hebei Normal University ShijiazhuangHebei 050024China School of.Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of.Astronomy and Space Science Nanjing UniversityNanjingJiangsu 210023China Key Laboratory of.Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of.f.ontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory f.r Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao Lee Institute&School of.Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of.Physical Science and Technology Southwest Jiaotong UniversityChengduSichuan 610031China College of.Physics Sichuan UniversityChengduSichuan 610065China Key Laboratory of.Cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China School of.physics and technology Wuhan UniversityWuhanHubei 430072Ch

The LhAASO-Wf.TA experiment,which aims to observe cosmic rays in the sub-EeV range using the f.uorescence technique,uses a new generation of.high-perf.rmance *** ensure that the experiment has ex-cellent detection capability associated with the measurement of.the energy spectrum,the primary composition of.cosmic rays,and so on,an accurate geometrical reconstruction of.air-shower events is *** paper de-scribes the development and testing of.geometrical reconstruction f.r stereo viewed events using the Wf.TA(Wide f.eld of.view Cherenkov/f.uorescence Telescope Array)*** approaches,which take f.ll advantage of.he Wf.TA *** *** is the stereo-angular method,which uses the pointing of.triggered SiPMs in the shower trajectory,and the other is the stereo-timing method,which uses the triggering time of.the f.red *** results show that both methods have good geometrical resolution:the resolution of.the stereo-timing method is slightly.b.tter than the stereo-angular method because the resolution of.the latter is slightly limited by the shower track length.

关键词： cosmic ray f.uorescence telescope stereo observation geometrical reconstruction

STCf.conceptual design report (Volume 1): Physics & detector

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f.ontiers of.physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti q.An X.z.bai y.b.i O.bakina A.barnyakov V.blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko z.h.bu f.M.Cai h.Cai j.j.Cao q.h.Cao X.Cao z.Cao q.Chang K.T.Chao D.y.Chen h.Chen h.X.Chen j.f.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.f.Chen X.R.Chen y.Chen y.q.Chen h.y.Cheng j.Cheng S.Cheng T.G.Cheng j.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.z.Ding L.y.Dong W.h.Dong V.Druzhinin D.S.Du y.j.Du z.G.Du L.M.Duan D.Epif.nov y.L.f.n S.S.f.ng z.j.f.ng G.f.dotovich C.q.f.ng X.f.ng y.T.f.ng j.L.f. j.Gao y.N.Gao P.S.Ge C.q.Geng L.S.Geng A.Gilman L.Gong T.Gong b.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.q.Guo f.K.Guo j.C.Guo j.Guo y.P.Guo z.h.Guo A.Guskov K.L.han L.han M.han X.q.hao j.b.he S.q.he X.G.he y.L.he z.b.he z.X.heng b.L.hou T.j.hou y.R.hou C.y.hu h.M.hu K.hu R.j.hu W.h.hu X.h.hu y.C.hu j.hua G.S.huang j.S.huang M.huang q.y.huang W.q.huang X.T.huang X.j.huang y.b.huang y.S.huang N.hüsken V.Ivanov q.P.ji j.j.jia S.jia z.K.jia h.b.jiang j.jiang S.z.jiang j.b.jiao z.jiao h.j.jing X.L.Kang X.S.Kang b.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.h.Li C.Li D.y.Li f.Li G.Li G.Li h.b.Li h.Li h.N.Li h.j.Li h.L.Li j.M.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.j.Li X.Li X.h.Li X.q.Li X.h.Li y.Li y.y.Li z.j.Li h.Liang j.h.Liang y.T.Liang G.R.Liao L.z.Liao y.Liao C.X.Lin D.X.Lin X.S.Lin b.j.Liu C.W.Liu D.Liu f.Liu G.M.Liu h.b.Liu j.Liu j.j.Liu j.b.Liu K.Liu K.y.Liu K.Liu L.Liu q.Liu S.b.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu z.q.Liu z.y.Liu z.W.Liu I.Logashenko y.Long C.G.Lu j.X.Lu N.Lu q.f.Lü y.Lu y.Lu z.Lu P.Lukin f.j.Luo T.Luo X.f.Luo y.h.Luo h.j.Lyu X.R.Lyu j.P.Ma P.Ma y.Ma y.M.Ma f.Maas S.Malde D.Matvienko z.X.Meng R.Mitchell A.Nef.diev y.Nef.dov S.L.Olsen q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei h.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata b.b.qi y.q.qi W.b.qian y.qian C.f.qiao j.j.qin j.j.qin L.q.qin X.S.qin T.L.qiu j.Rademacker C.f.Redmer h.y.Sang Anhui University Hefei 230039China beihang University Beijing 100191China budker Institute of.Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of.Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of.Geosciences Wuhan 430074China China University of.Mining and Technology Xuzhou 221116China École Polytechnique f.dérale de Lausanne(EPf.) LausanneSwitzerland f.dan University Shanghai 200433China Goethe University f.ankf.rt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou Institute f.r Advanced Study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hef.i University of.Technology Hefei 230601China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics Center Chung-Ang UniversitySeoul 06974Korea higher School of.Economy 11 Pokrovsky.b.lvar Moscow 109028Russia huangshan University Huangshan 245000China hubei University of.Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of.Science and Technology Xiangtan 411201China hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of.Advanced Science f.cilities Shenzhen 518107China Institute of.high Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of.Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of.Physics Academia SinicaTaipeiTaiwan 11529China Institute of.Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm f.cility(STCf.is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of.mass energy range f.om 2 to 7 GeV with a peak luminosity of.0.5×10^(35) cm^(–2)·s^(–1) or *** STCf.will produce a data sample about a f.ctor of.100 larger than that of.the presentτ-charm f.ctory—the bEPCII,providing a unique platf.rm f.r exploring the asymmetry of.matter-antimatter(charge-parity violation),in-depth studies of.the internal structure of.hadrons and the nature of.non-perturbative strong interactions,as well as searching f.r exotic hadrons and physics beyond the Standard *** STCf.project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCf.describes conceptual designs of.the STCf.detector system,and discusses f.ture plans f.r detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCf.detector conceptual design

Observation of.the Crab Nebula with LhAASO-KM2A−a perf.rmance study

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Chinese Physics C 2021年第2期45卷 518-530页

作者： f.Aharonian q.An Axikegu L.X.bai y.X.bai y.W.bao D.bastieri X.j.bi y.j.bi h.Cai j.T.Cai z.Cao j.Chang j.f.Chang X.C.Chang b.M.Chen j.Chen L.Chen M.j.Chen M.L.Chen q.h.Chen S.h.Chen S.z.Chen T.L.Chen X.L.Chen y.Chen N.Cheng y.D.Cheng S.W.cui X.h.cui y.D.cui b.z.Dai h.L.Dai z.G.Dai D.della Volpe b.D'Ettorre Piazzoli X.j.Dong j.h.f.n y.z.f.n z.X.f.n j.f.ng K.f.ng C.f.f.ng L.f.ng S.h.f.ng y.L.f.ng b.Gao C.D.Gao q.Gao W.Gao M.M.Ge L.S.Geng G.h.Gong q.b.Gou M.h.Gu j.G.Guo X.L.Guo y.q.Guo y.y.Guo y.A.han h.h.he h.N.he j.C.he S.L.he X.b.he y.he M.heller y.K.hor C.hou X.hou h.b.hu S.hu S.C.hu X.j.hu D.h.huang q.L.huang W.h.huang X.T.huang z.C.huang f.ji X.L.ji h.y.jia K.jiang z.j.jiang C.jin D.Kuleshov K.Levochkin b.b.Li C.Li f.Li h.b.Li h.C.Li h.y.Li j.Li K.Li W.L.Li X.Li X.R.Li y.Li y.z.Li z.Li E.W.Liang y.f.Liang S.j.Lin b.Liu C.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.S.Liu j.y.Liu M.y.Liu R.y.Liu S.M.Liu W.Liu y.N.Liu z.X.Liu W.j.Long R.Lu h.K.Lv b.q.Ma L.L.Ma X.h.Ma j.R.Mao A.Masood W.Mitthumsiri T.Montaruli y.C.Nan b.y.Pang P.Pattarakijwanich z.y.Pei M.y.qi D.Ruf.olo V.Rulev A.Sáiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi h.C.Song yu.V.Stenkin V.Stepanov q.N.Sun X.N.Sun z.b.Sun P.h.T.Tam z.b.Tang W.W.Tian b.D.Wang C.Wang h.Wang h.G.Wang j.C.Wang j.S.Wang L.P.Wang L.y.Wang R.N.Wang W.Wang X.G.Wang X.j.Wang X.y.Wang y.D.Wang y.j.Wang y.P.Wang z.Wang z.h.Wang z.X.Wang D.M.Wei j.j.Wei y.j.Wei T.Wen C.y.Wu h.R.Wu S.Wu W.X.Wu X.f.Wu S.q.Xi j.Xia j.j.Xia G.M.Xiang G.Xiao h.b.Xiao G.G.Xin y.L.Xin y.Xing D.L.Xu R.X.Xu L.Xue D.h.yan C.W.yang f.f.yang j.y.yang L.L.yang M.j.yang R.z.yang S.b.yang y.h.yao z.G.yao y.M.ye L.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.D.zeng T.X.zeng W.zeng z.K.zeng M.zha X.X.zhai b.b.zhang h.M.zhang h.y.zhang j.L.zhang j.W.zhang L.zhang L.X.zhang P.f.zhang P.P.zhang R.zhang S.R.zhang S.S.zhang X.zhang X.P.zhang y.zhang y.f.zhang y.L.zhang b.zhao j.zhao L.zhao L.z.zhao S.P.zhao f.zheng y.zheng b.zhou h.zhou j.N.zhou P.zhou R.zhou X.X.zhou C.G.zhu f.R.zhu h.zhu K.j.z.u X.zuo Key Laboratory of.Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of.Chinese Academy of.Sciences 100049 BeijingChina TIANf. Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of.Particle Detection and Electronics China University of.Science and Technology of.China 230026 HefeiAnhuiChina Department of.Engineering Physics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina School of.Physics Peking University100871 BeijingChina Center f.r Astrophysics Guangzhou University510006 GuangzhouGuangdongChina School of.Physics and Astronomy&School of.Physics(Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina School of.Physical Science and Technology Guangxi University530004 NanningGuangxiChina hebei Normal University 050024 ShijiazhuangHebeiChina School of.Physics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina School of.Astronomy and Space Science Nanjing University210023 NanjingJiangsuChina Key Laboratory of.Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of.f.ontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key Laboratory f.r Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao Lee Institute&School of.Physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina School of.Physical Science and Technology&School of.Inf.rmation Science and Technology Southwest Jiaotong University610031 ChengduSichuanChina College of.Physics Sichuan University610065 ChengduSichuanChina Key Laboratory of.Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School of.Physics and Tec

A sub-array of.the Large high Altitude Air Shower Observatory(LhAASO),KM2A is mainly designed to observe a large f.action of.the northern sky to hunt f.r γ-ray sources at energies above 10 *** though the detector construction is still underway,half.of.the KM2A array has been operating stably since the end of.*** this paper,we present the KM2A data analysis pipeline and the f.rst observation of.the Crab Nebula,a standard candle in very high energy γ-ray *** detect γ-ray signals f.om the Crab Nebula in both energy ranges of.10-100 TeV and>100 TeV with high signif.cance,by analyzing the KM2A data of.136 live days between December 2019 and May *** the observations,we test the detector perf.rmance,including angular resolution,pointing accuracy and cosmic-ray.b.ckground rejection *** energy spectrum of.the Crab Nebula in the energy range 10-250 TeV f.ts well with a single power-law f.nction dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm^(-2) s^(-1) TeV^(-1).It is consistent with previous measurements by other *** opens a new window of.γ-ray astronomy above 0.1 PeV through which new ultrahigh-energy γ-ray phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray Crab Nebula extensive air showers cosmic rays

f.ture Physics Programme of.bESⅢ

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Chinese Physics C 2020年第4期44卷 I0001-I0004,1-102页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht M.Alekseev A.Amoroso f.f.An q.An y.b.i O.bakina R.baldini f.rroli y.b.n K.begzsuren j.V.bennett N.berger M.bertani D.bettoni f.bianchi j biernat j.bloms I.boyko R.A.briere L.Calibbi h.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.Chai j.f.Chang W.L.Chang j.Charles G.Chelkov Chen G.Chen h.S.Chen j.C.Chen M.L.Chen S.j.Chen y.b.Chen h.y.Cheng W.Cheng G.Cibinetto f.Cossio X.f.cui h.L.Dai j.P.Dai X.C.Dai A.Dbeyssi D.Dedovich z.y.Deng A.Denig Denysenko M.Destef.nis S.Descotes-Genon f.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong z.L.Dou S.X.Du S.I.Eidelman j.z.f.n j.f.ng S.S.f.ng y.f.ng R.f.rinelli L.f.va f.f.ldbauer G.f.lici C.q.f.ng M.f.itsch C.D.f. y.f. q.Gao X.L.Gao y.Gao y.Gao y.G.Gao z.Gao b.Garillon I.Garzia E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.h.Gu y.T.Gu A.q.Guo f.K.Guo L.b.Guo R.P.Guo y.P.Guo A.Guskov S.han X.q.hao f.A.harris K.L.he f.h.heinsius T.held y.K.heng y.R.hou z.L.hou h.M.hu j.f.hu T.hu y.hu G.S.huang j.S.huang X.T.huang X.z.h.ang z.L.huang N.huesken T.hussain W.Ikegami Andersson W.Imoehl M.Irshad q.ji q.P.ji X.b.ji X.L.ji h.L.jiang X.S.jiang X.y.jiang j.b.jiao z.jiao D.P.jin S.jin y.jin T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk b.C.Ke I.K.Keshk T.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.b.Kolcu b.Kopf.M.Kuemmel M.Kuessner A.Kupsc M.Kurth M.G.Kurth W.Kuhn j.S.Lange P.Larin L.Lavezzi h.Leithof. T.Lenz C.Li Cheng Li D.M.Li f.Li f.y.Li G.Li h.b.Li h.j.Li j.C.Li j.W.Li Ke Li L.K.Li Lei Li P.L.Li P.R.Li q.y.Li W.D.Li W.G.Li X.h.Li X.L.Li X.N.Li X.q.Li z.b.Li h.Liang h.Liang y.f.Liang y.T.Liang G.R.Liao L.z.Liao j.Libby C.X.Lin D.X.Lin y.j.Lin b.Liu b.j.Liu C.X.Liu D.Liu D.y.Liu f.h.Liu f.ng Liu f.ng Liu h.b.Liu h.M.Liu huanhuan Liu huihui Liu j.b.Liu j.y.Liu K.y.Liu Ke Liu q.Liu S.b.Liu T.Liu X.Liu X.y.Liu y.b.Liu z.A.Liu zhiqing Liu y.f.Long X.C.Lou h.j.Lu j.D.Lu j.G.Lu y.Lu y.P.Lu C.L.Luo M.X.Luo P.W.Luo T.Luo X.L.Luo S.Lusso X.R.Lyu f.C.Ma h.L.Ma L.L.Ma M.M.Ma q.M.Ma X.N.Ma X.X. Institute of.high Energy Physics Beijing 100049China beihang University Beijing 100191China beijing Institute of.Petrochemical Technology Beijing 102617China bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of.Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan f.dan University Shanghai 200443China G.I.budker Institute of.Nuclear Physics Sb RAS(bINP) Novosibirsk 630090Russia GSI helmholtzcentre f.r heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of.Science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of.Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INf. Laboratori Nazionali di f.ascati I-00044FrascatiItaly INf. Sezione di f.rrara I-44122FerraraItaly Institute of.Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia johannes Gutenberg University of.Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute f.r Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China Peking University Beijing 100871China Shandong University Jinan 250100China Shanghai

There has recently.b.en a dramatic renewal of.interest in hadron spectroscopy and charm physics. This renaissance has been driven in part by the discovery of.a plethora of.charmonium-like Xyz states at bESⅢ and b f.ctories, and the observation of.an intriguing proton-antiproton threshold enhancement and the possibly related X(1835) meson state at bESⅢ, as well as the threshold measurements of.charm mesons and charm baryons. We present a detailed survey of.the important topics in tau-charm physics and hadron physics that can be f.rther explored at bESⅢ during the remaining operation period of.bEPCⅡ. This survey will help in the optimization of.the data-taking plan over the coming years, and provides physics motivation f.r the possible upgrade of.bEPCⅡ to higher luminosity.

关键词： meson hadron optimization

Study of.bESIII trigger ef.iciencies with the 2018 j/ψ data

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Chinese Physics C 2021年第2期45卷 48-55页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An q.An X.h.bai y.b.i O.bakina R.baldini f.rroli I.balossino y.b.n K.begzsuren N.berger M.bertani D.bettoni f.bianchi j.bloms A.bortone I.boyko R.A.briere h.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.f.Chang W.L.Chang G.Chelkov D.y.Chen G.Chen h.S.Chen M.L.Chen S.j.Chen X.R.Chen y.b.Chen z.j Chen W.S.Cheng G.Cibinetto f.Cossio X.f.cui h.L.Dai X.C.Dai A.Dbeyssi R.E.de boer D.Dedovich z.y.Deng A.Denig I.Denysenko M.Destef.nis f.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong S.X.Du y.L.f.n j.f.ng S.S.f.ng y.f.ng R.f.rinelli L.f.va f.f.ldbauer G.f.lici C.q.f.ng j.h.f.ng M.f.itsch C.D.f. y.Gao y.Gao y.Gao y.G.Gao I.Garzia P.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.h.Gu S.Gu y.T.Gu C.y Guan A.q.Guo L.b.Guo R.P.Guo y.P.Guo A.Guskov T.T.han W.y.han X.q.hao f.A.harris h hüsken K.L.he f.h.heinsius C.h.heinz T.held y.K.heng C.herold M.himmelreich T.holtmann y.R.hou z.L.hou h.M.hu j.f.hu T.hu y.hu G.S.huang L.q.huang X.T.huang y.P.huang z.h.ang T.hussain W.Ikegami Andersson W.Imoehl M.Irshad S.jaeger S.janchiv q.ji q.P.ji X.b.ji X.L.ji h.b.jiang X.S.jiang j.b.jiao z.jiao S.jin y.jin T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk b.C.Ke I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.b.Kolcu b.Kopf.M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kühn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi z.h.Lei h.Leithof. M.Lellmann T.Lenz C.Li C.h.Li Cheng Li D.M.Li f.Li G.Li h.Li h.Li h.b.Li h.j.Li j.L.Li j.q.Li j.S.Li Ke Li L.K.Li Lei Li P.R.Li S.y.Li W.D.Li W.G.Li X.h.Li X.L.Li z.y.Li h.Liang h.Liang h.Liang y.f.Liang y.T.Liang L.z.Liao j.Libby C.X.Lin b.j.Liu C.X.Liu D.Liu f.h.Liu f.ng Liu f.ng Liu h.b.Liu h.M.Liu huanhuan Liu huihui Liu j.b.Liu j.L.Liu j.y.Liu K.Liu K.y.Liu Ke Liu L.Liu M.h.Liu P.L.Liu q.Liu q.Liu S.b.Liu Shuai Liu T.Liu W.M.Liu X.Liu y.Liu y.b.Liu z.A.Liu z.q.Liu X.C.Lou f.X.Lu h.j.Lu j.D.Lu j.G.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo M.X.Luo b P.W.Luo T.Luo X.L.Luo S Institute of.high Energy Physics Beijing 100049China beihang University Beijing 100191China beijing Institute of.Petrochemical Technology Beijing 102617China bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of.Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan f.dan University Shanghai 200443China GIbudker Institute of.Nuclear Physics Sb RAS(bINP) Novosibirsk 630090Russia GSI helmholtzcentre f.r heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of.Science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of.Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA (A)INf. Laboratori Nazionali di f.ascati I-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly (A)INf. Sezione di f.rrara I-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Institute of.Modern Physics Lanzhou 730000China Institute of.Physics and Technology Peace Ave54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of.Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute f.r Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen IIPhysikalisches InstitutHeinrich-Buff-Ring 16D-35392GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning Normal Unive

Using a dedicated data sample taken in 2018 on the j/ψpeak,we perf.rm a detailed study of.the trigger ef.iciencies of.the bESIII *** ef.iciencies are determined f.om three representative physics processes,namely.b.abha scattering,dimuon production and generic hadronic events with charged *** combined ef.iciency of.all active triggers approaches 100%in most cases,with uncertainties small enough not to af.ect most physics analyses.

关键词： bESIII trigger ef.iciency bhabha dimuon hadronic events

Measurements of.the center-of.mass energies of.e^(+)e^(-)collisions at bESIII

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Chinese Physics C 2021年第10期45卷 7-15页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An q.An X.h.bai y.b.i O.bakina R.baldini f.rroli I.balossino y.b.n K.begzsuren N.berger M.bertani D.bettoni f.bianchi j.bloms A.bortone I.boyko R.A.briere h.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.f.Chang W.L.Chang G.Chelkov D.y.Chen G.Chen h.S.Chen M.L.Chen S.j.Chen X.R.Chen y.b.Chen z.j.Chen W.S.Cheng G.Cibinetto f.Cossio X.f.cui h.L.Dai X.C.Dai A.Dbeyssi R.E.de boer D.Dedovich z.y.Deng A.Denig I.Denysenko M.Destef.nis f.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong S.X.Du y.L.f.n j.f.ng S.S.f.ng y.f.ng R.f.rinelli L.f.va f.f.ldbauer G.f.lici C.q.f.ng j.h.f.ng M.f.itsch C.D.f. y.Gao y.Gao y.Gao y.G.Gao I.Garzia P.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.h.Gu y.T.Gu C.y Guan A.q.Guo L.b.Guo R.P.Guo y.P.Guo A.Guskov T.T.han W.y.han X.q.hao f.A.harris K.L.he f.h.heinsius C.h.heinz T.held y.K.heng C.herold M.himmelreich T.holtmann G.y.hou y.R.hou z.L.hou h.M.hu j.f.hu T.hu y.hu G.S.huang L.q.huang X.T.huang y.P.huang z.h.ang T.hussain N husken W.Ikegami Andersson W.Imoehl M.Irshad S.jaeger S.janchiv q.ji q.P.ji X.b.ji X.L.ji y.y.ji h.b.jiang X.S.jiang j.b.jiao z.jiao S.jin y.jin M.q.jing T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk b.C.Ke I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.b.Kolcu b.Kopf.M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kuhn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi z.h.Lei h.Leithof. M.Lellmann T.Lenz C.Li C.h.Li Cheng Li D.M.Li f.Li G.Li h.Li h.Li h.b.Li h.j.Li j.L.Li j.q.Li j.S.Li Ke Li L.K.Li Lei Li P.R.Li S.y.Li W.D.Li W.G.Li X.h.Li X.L.Li Xiaoyu Li z.y.Li h.Liang h.Liang h.Liang y.f.Liang y.T.Liang G.R.Liao L. z. Liao j.Libby C.X.Lin b.j.Liu C.X.Liu D.Liu f.h.Liu f.ng Liu f.ng Liu h.b.Liu h.M.Liu huanhuan Liu huihui Liu j.b.Liu j.L.Liu j.y.Liu K.Liu K.y.Liu L.Liu M.h.Liu P.L.Liu q.Liu q.Liu S.b.Liu Shuai Liu T.Liu W.M.Liu X.Liu y.Liu y.b.Liu z.A.Liu z.q.Liu X.C.Lou f.X.Lu h.j.Lu j.D.Lu j.G.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo Institute of.high Energy Physics Beijing 100049China beihang University Beijing 100191China beijing Institute of.Petrochemical Technology Beijing 102617China bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of.Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan f.dan University Shanghai 200443China G.I.budker Institute of.Nuclear Physics Sb RAS(bINP) Novosibirsk 630090Russia GSI helmholtzcentre f.r heavy Ion Research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University of.Science and Technology Luoyang 471003China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of.Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INf. Laboratori Nazionali di f.ascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INf. Laboratori Nazionali di f.ascati INFN Sezione di PerugiaI-06100PerugiaItaly INf. Laboratori Nazionali di f.ascati University of PerugiaI-06100PerugiaItaly INf. Sezione di f.rrara INFN Sezione di FerraraI-44122FerraraItaly INf. Sezione di f.rrara University of FerraraI-44122FerraraItaly 25Institute of Modern PhysicsLanzhou 730000China Institute of.Modern Physics Lanzhou 730000China Institute of.Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of.Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute f.r Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikali

During the 2016-17 and 2018-19 running periods,the bESIII experiment collected 7.5 f. of.e^(+)e^(-)collision data at center-of.mass energies ranging f.om 4.13 to 4.44 *** data samples are primarily used f.r the study of.excited charmonium and charmoniumlike *** analyzing the di-muon process e^(+)e^(-)→(γISR=f.R)μ^(+)μ^(-),we measure the center-of.mass energies of.the data samples with a precision of.0.6 *** a run-by-run study,we f.nd that the center-of.mass energies were stable throughout most of.the data-collection period.

关键词： center-of.mass energy e^(+)e^(-) annihilation bESIII

Reconstruction of.Cherenkov image bymultiple telescopes of.LhAASO-Wf.TA

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Radiation Detection Technology and Methods 2022年第4期6卷 544-557页

作者： f.Aharonian q.An Axikegu L.X.bai y.X.bai y.W.bao D.bastieri X.j.bi y.j.bi j.T.Cai zhe Cao zhen Cao j.Chang j.f.Chang E.S.Chen Liang Chen Liang Chen Long Chen M.j.Chen M.L.Chen q.h.Chen S.h.Chen S.z.Chen T.L.Chen y.Chen h.L.Cheng N.Cheng y.D.Cheng S.W.cui X.h.cui y.D.cui b.D’Ettorre Piazzoli b.z.Dai h.L.Dai z.G.Dai Danzengluobu Ddella Volpe K.K.Duan j.h.f.n y.z.f.n z.X.f.n j.f.ng K.f.ng C.f.f.ng L.f.ng S.h.f.ng X.T.f.ng y.L.f.ng b.Gao C.D.Gao L.q.Gao q.Gao W.Gao W.K.Gao M.M.Ge L.S.Geng G.h.Gong q.b.Gou M.h.Gu f.L.Guo j.G.Guo X.L.Guo y.q.Guo y.y.Guo y.A.han h.h.he h.N.he S.L.he X.b.he y.he M.heller y.K.hor C.hou X.hou h.b.hu q.hu S.hu S.C.hu X.j.hu D.h.huang W.h.huang X.T.huang X.y.huang y.huang z.C.huang X.L.ji h.y.jia K.jia K.jiang z.j.jiang M.jin M.M.Kang T.Ke D.Kuleshov K.Levochkin b.b.Li Cheng Li Cong Li f.Li h.b.Li h.C.Li h.y.Li j.Li jian Li jie Li K.Li WLLi XRLi Xin Li Xin Li yzLi zhe Li zhuo Li E.W.Liang y.f.Liang S.j.Lin b.Liu C.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.S.Liu j.y.Liu M.y.Liu R.y.Liu S.M.Liu W.Liu y.Liu y.N.Liu W.j.Long R.Lu q.Luo h.K.Lv b.q.Ma L.L.Ma X.h.Ma j.R.Mao A.Masood z.Min W.Mitthumsiri y.C.Nan z.W.Ou b.y.Pang P.Pattarakijwanich z.y.Pei M.y.qi y.q.qi b.q.qiao j.j.qin D.Ruf.olo A.Sáiz C.y.Shao L.Shao O.Shchegolev X.D.Sheng j.y.Shi h.C.Song yu.V.Stenkin V.Stepanov y.Su q.N.Sun X.N.Sun z.b.Sun P.h.T.Tam z.b.Tang W.W.Tian b.D.Wang C.Wang h.Wang h.G.Wang j.C.Wang j.S.Wang L.P.Wang L.y.Wang R.Wang R.N.Wang W.Wang X.G.Wang X.y.Wang y.Wang y.D.Wang y.j.Wang y.P.Wang z.h.Wang z.X.Wang zhen Wang zheng Wang D.M.Wei j.j.Wei y.j.Wei T.Wen C.y.Wu h.R.Wu S.Wu X.f.Wu y.S.Wu S.q.Xi j.Xia j.j.Xia G.M.Xiang D.X.Xiao G.Xiao G.G.Xin y.L.Xin y.Xing z.Xiong D.L.Xu R.X.Xu L.Xue D.h.yan j.z.yan C.W.yang f.f.yang h.W.yang j.y.yang L.L.yang M.j.yang R.z.yang S.b.yang y.h.yao z.G.yao y.M.ye L.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.yue h.D.zeng T.X.zeng W.zeng z.K.zeng M.zha X.X.zhai b.b.zhang f.zhang h.M.zhang h.y.zhang j.L.zhang L.X.zhang Li zhang Lu zhang P.f.zhang P.P.zhang R.zhang S.b.zhang S.R.zhang S. Key Laboratory of.Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of.Chinese Academy of.Sciences Beijing 100049China TIANf. Cosmic Ray Research Center ChengduSichuanChina Dublin Institute f.r Advanced Studies 31 Fitzwilliam Place2DublinIreland Max-Planck-Institut f.r Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of.Particle Detection and Electronics BeijingChina University of.Science and Technology of.China Hefei 230026AnhuiChina School of.Physical Science and Technology&School of.Inf.rmation Science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina College of.Physics Sichuan UniversityChengdu 610065SichuanChina School of.Astronomy and Space Science Nanjing UniversityNanjing 210023JiangsuChina Center f.r Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina Key Laboratory of.Dark Matter and Space Astronomy&Key Laboratory of.Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Key Laboratory f.r Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of.Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China hebei Normal University Shijiazhuang 050024HebeiChina School of.Physics and Astronomy(zhuhai)&Sino-f.ench Institute of.Nuclear Engineering and Technology(zhuhai) Sun Yat-sen UniversityZhuhai 519000China School of.Physics(Guangzhou) Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Dipartimento di f.sica dell’Universitàdi Napoli“f.derico II” Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly School of.Physics and Astronomy Yunnan UniversityKunming 650091YunnanChina Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève

Introduction One of.main scientiﬁc goals of.the Large high Altitude Air Shower Observatory(LhAASO)is to accurately measure the energy spectra of.dif.erent cosmic ray compositions around the‘knee’*** Wide f.eld-of.View(f.V)Cherenkov Telescope Array(Wf.TA),which is one of.the main detectors of.LhAASO and has 18 telescopes,is built to achieve this *** telescopes are put together and point to connected directions f.r a larger *** Telescopes are deployed spatially as close as possible,but due to their own size,the distance between two adjacent telescopes is about 10 ***,the Cherenkov lateral distribution and the parallax between the two telescopes should be considered in the event building process f.r images crossing over the boundaries of.f.Vs of.the *** event building method f.r Cherenkov images measured by multiple telescopes of.Wf.TA is *** perf.rmance of.the shower measurements using the combined images is evaluated by comparing with showers that are f.lly contained by a virtual telescope in *** and conclusion It is proved that the developed event building process can help to increase the f.V of.Wf.TA by 30%while maintaining the same reconstruction quality,compared to the separate telescope reconstruction method.

关键词： method directions conclusion