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Chinese Physics C 2021年第5期45卷 190-201页

作者： f.P.An A.B.Balantekin H.R.Band M.Bishai S.Blyth G.f.Cao j.Cao j.f.chang Y.chang H.S.Chen S.M.Chen Y.Chen Y.X.Chen j.Cheng Z.K.Cheng j.j.Cherwinka M.C.Chu j.P.Cummings O.Dalager f.S.Deng Y.Y.Ding M.V.Diwan T.Dohnal j.Dove M.Dvorak D.A.Dwyer j.P.Gallo M.Gonchar G.H.Gong H.Gong W.Q.Gu j.Y.Guo L.Guo X.H.Guo Y.H.Guo Z.Guo R.W.Hackenburg S.Hans M.He K.M.Heeger Y.K.Heng A.Higuera Y.K.Hor Y.B.Hsiung B.Z.Hu j.R.Hu T.Hu Z.j.Hu H.X.Huang X.T.Huang Y.B.Huang P.Huber D.E.jaffe K.L.jen X.L.ji X.P.ji R.A.johnson D.jones L.Kang S.H.Kettell S.Kohn M.Kramer T.j.Langford j.Lee j.H.C.Lee R.T.Lei R.Leitner j.K.C.Leung f.Li j.j.Li Q.j.Li S.Li S.C.Li W.D.Li X.N.Li X.Q.Li Y.f.Li Z.B.Li H.Liang C.j.Lin G.L.Lin S.Lin j.j.Ling j.M.Link L.Littenberg B.R.Littlejohn j.C.Liu j.L.Liu C.Lu H.Q.Lu j.S.Lu K.B.Luk X.B.Ma X.Y.Ma Y.Q.Ma C.Marshall D.A.Martinez Caicedo K.T.MeDonald R.D.McKeown Y.Meng j.Napolitano D.Naumov E.Naumova j.P.Ochoa-Ricoux A.OIshevskiy H.-R.Pan j.Park S.Patton j.C.Peng C.S.j.Pun f.Z.Qi M.Qi X.Qian N.Raper j.Ren C.Morales Reveco R.Rosero B.Roskovec X.C.Ruan H.Steiner j.L.Sun T.Tmej K.Treskov W.-H.Tse C.E.Tull B.Viren V.Vorobel C.H.Wang j.Wang M.Wang N.Y.Wang R.G.Wang W.Wang W.Wang X.Wang Y.Wang Y.f.Wang Z.Wang Z.Wang Z.M.Wang H.Y.Wei L.H.Wei L.j.Wen K.Whisnant C.G.White H.L.H.Wong E.Worcester D.R.Wu f.L.Wu Q.Wu W.j.Wu D.M.Xia Z.Q.Xie Z.Z.Xing j.L.Xu T.Xu T.Xue C.G.Yang L.Yang Y.Z.Yang H.f.Yao M.Ye M.Yeh B.L.Young H.Z.Yu Z.Y.Yu B.B.Yue S.Zeng Y.Zeng L.Zhan C.Zhang f.Y.Zhang H.H.Zhang j.W.Zhang Q.M.Zhang X.T.Zhang Y.M.Zhang Y.X.Zhang Y.Y.Zhang Z.j.Zhang Z.P.Zhang Z.Y.Zhang j.Zhao L.Zhou H.L.Zhuang j.H.Zou Instiute of Modern Physics East China University of Science and TechnologyShanghai 200237 University of Wisconsin MadisonWisconsin 53706 Wright Laboratory and Department of Physics Yale UniversityNew HavenConnecticut 06520 Brookhaven National Laboratory UptonNew York 11973 Department of Physics National Taiwan UniversityTaipei Institute of High Energy Physics Beijing 100049 National United University Miao-Li Department of Engineering Physics Tsinghua UniversityBejing 100084 Shenzhen University Shenzhen 518060 Sun Yat-Sen(Zhongshan)University Guangzhou North China Electric Power University Bejjing 102206 Chinese University of Hong Kong Hong Kong 999077 Siena College LoudonvilleNew York 12211 Department of Physics and Astronomy University of CaliforniaIrvineCaliformia 92697 University of Science and Technology of China Hefei 230026 Charles University Faculty of Mathematics and PhysicsPrague Department of Physics University of llinois at Urbana-ChampaignUrbanaIlinois 61801 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Department of Physics Illinois Institute of TechnologyChicagoIllinois 60616 joint Institute for Nuclear Research DubnaMoscow Region Beijing Normal University Beijing 100875 Department of Nuclear Science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 Department of Physics University of HoustonHoustonTexas 77204 China Institute of Atomic Energy Beijing 102413 Shandong University Jinan 250100 Guangxi University Nanning 530004 Center for Neutrino Physics Virginia TechBlacksburgVirginia 24061 Institute of Physics National Chiao-Tung UniversityHsinchu Department of Physics University of CincinnatiCincinnatiOhio 45221 Department of Physies Collge of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 Dongguan University of Technology Dongguan 523808 Department of Physics University of CaliforniaBerkeleyCalifornia 94720 Department of Physics The University of Hong KongPokfulamHong Kong 999077 School

The establishment of a possible connection between neutrino emission and gravitational-wave(GW)bursts is important to our understanding of the physical processes that occur when black holes or neutron stars *** the Daya Bay experiment,using the data collected from December 2011 to August 2017,a search was per-formed for electron-antineutrino signals that coincided with detected GW events,including GW150914,GW151012,GW151226,GW170104,GW170608,GW 170814,and GW *** used three time windows of±10,±500,and±1000 s relative to the occurrence of the GW events and a neutrino energy range of 1.8 to 100 MeV to search for correlated neutrino *** detected electron-antineutrino candidates were consistent with the expected background rates for all the three time *** monochromatic spectra,we found upper limits(90%confidence level)of the electron-antineutrino fluence of(1.13-2.44)×10^(11)cm^(-2)at 5 MeV to 8.0×10^(7)cm^(-2)at 100 MeV for the three time w *** the assumption of a fermi-Dirac spectrum,the upper limits were found to be(5.4-7.0)×10^(9)cm^(2)for the three time windows.

关键词： grav itational waves electron-antineutrinos fluence upper limit

Geometrical reconstruction of fluorescence 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.fan Y.Z.fan Z.X.fan j.fang j.fang C.f.feng L.feng S.H.feng Y.L.feng 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.Ruffolo 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 TIANfU 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 for 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 frontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory for 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-WfCTA experiment,which aims to observe cosmic rays in the sub-EeV range using the fluorescence technique,uses a new generation of high-performance *** 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 for stereo viewed events using the WfCTA(Wide field of view Cherenkov/fluorescence Telescope Array)*** approaches,which take full advantage ofthe WfCTA *** *** 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 fired *** results show that both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly better than the stereo-angular method because the resolution of the latter is slightly limited by the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

Observation of the Crab Nebula with LHAASO-KM2A−a performance 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.fan Y.Z.fan Z.X.fan j.fang K.fang C.f.feng L.feng S.H.feng Y.L.feng 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.Ruffolo 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.Zhu 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 TIANfU 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 for 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 frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key Laboratory for 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 Information 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 fraction of the northern sky to hunt for 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 first observation of the Crab Nebula,a standard candle in very high energy γ-ray *** detect γ-ray signals from the Crab Nebula in both energy ranges of 10-100 TeV and>100 TeV with high significance,by analyzing the KM2A data of 136 live days between December 2019 and May *** the observations,we test the detector performance,including angular resolution,pointing accuracy and cosmic-ray background rejection *** energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function 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

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由恒河猴腎上皮細胞分离的隐性病毒

微生物学报 1965年第1期 114-118页

作者：苏誠欽張鏡芳朱南英李質怀中国医学科学院医学生物学研究所

1.两年来,我們从未曾接种过病毒的正常恆河腎上皮細胞培养物分离到6株自发性隐性病毒,并对其中的Ⅲ-32毒株比較系統地进行了細胞病变特征,繁殖特性,理化性貭,細胞敏感性和动物致病性等方面的研究和观察。 2.所有6株病毒在猴腎上皮細胞... 详细信息

1.两年来,我們从未曾接种过病毒的正常恆河腎上皮細胞培养物分离到6株自发性隐性病毒,并对其中的Ⅲ-32毒株比較系統地进行了細胞病变特征,繁殖特性,理化性貭,細胞敏感性和动物致病性等方面的研究和观察。 2.所有6株病毒在猴腎上皮細胞培养物上都产生相同的特异性病变,即产生胞浆內泡沫样空泡和多核融合細胞。未見有核內或胞浆內包涵体。 3.Ⅲ-32毒株对恆河、平頂、紅面、藏酋及熊猴的腎上皮細胞培养物都有敏感性,对兔腎,人胚腎,皮肤,肌肉,人羊膜,恆河猴睾丸的細胞培养物以及乳鼠和家兔都不敏感。在猴腎細胞培养物的繁殖滴度都很低,接种14天以后,最高滴度只有103.0TCD50/毫升。在猴腎細胞培养物上經过十多次传代,滴度仍未見提高。 4.Ⅲ-32毒株未能被脊髓灰貭炎1、2、3型,Coxsackie A9、B1-B5型,ECHO 1-9型特异免疫血清以及典型麻疹患者恢复期血清所中和。 5.Ⅲ-32毒株对乙醚有抵抗性。該病毒在22℃保存不超过1周,4℃不超过1个月,-20℃不超过半年。用37℃連續传代培养的病毒液,接种猴腎細胞培养物时,細胞病变出現时間比4℃或-20℃保存者为早。

关键词：培养物核融合空泡敏感性泡沫样病毒液病毒株病变特征隐性病毒恒河猴猕猴

future 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.Bai O.Bakina R.Baldini ferroli Y.Ban 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.Destefanis 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.fan j.fang S.S.fang Y.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng M.fritsch C.D.fu Y.fu 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.Huang 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.Leithoff 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 fang Liu feng 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 fudan University Shanghai 200443China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for 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 INfN Laboratori Nazionali di frascati I-00044FrascatiItaly INfN Sezione di ferrara 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 for 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 been 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 factories, 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 further 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 for the possible upgrade of BEPCⅡ to higher luminosity.

关键词： meson hadron optimization

Study of BESIII trigger efficiencies 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.Bai O.Bakina R.Baldini ferroli I.Balossino Y.Ban 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.Destefanis f.De Mori Y.Ding C.Dong j.Dong L.Y.Dong M.Y.Dong X.Dong S.X.Du Y.L.fan j.fang S.S.fang Y.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng j.H.feng M.fritsch C.D.fu 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.Huang 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.Leithoff 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 fang Liu feng 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 fudan University Shanghai 200443China GIBudker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for 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)INfN Laboratori Nazionali di frascati I-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly (A)INfN Sezione di ferrara 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 for 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 perform a detailed study of the trigger efficiencies of the BESIII *** efficiencies are determined from three representative physics processes,namely Bhabha scattering,dimuon production and generic hadronic events with charged *** combined efficiency of all active triggers approaches 100%in most cases,with uncertainties small enough not to affect most physics analyses.

关键词： BESIII trigger efficiency 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.Bai O.Bakina R.Baldini ferroli I.Balossino Y.Ban 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.Destefanis f.De Mori Y.Ding C.Dong j.Dong L.Y.Dong M.Y.Dong X.Dong S.X.Du Y.L.fan j.fang S.S.fang Y.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng j.H.feng M.fritsch C.D.fu 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.Huang 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.Leithoff 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 fang Liu feng 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 fudan University Shanghai 200443China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for 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 INfN Laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN Laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN Laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN Sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN Sezione di ferrara 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 for 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 fb of e^(+)e^(-)collision data at center-of-mass energies ranging from 4.13 to 4.44 *** data samples are primarily used for the study of excited charmonium and charmoniumlike *** analyzing the di-muon process e^(+)e^(-)→(γISR=fSR)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 find 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

Antineutrino energy spectrum unfolding based on the Daya Bay measurement and its applications

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Chinese Physics C 2021年第7期45卷 1-19页

作者： f.P.An A.B.Balantekin M.Bishai S.Blyth G.f.Cao j.Cao j.f.chang Y.chang H.S.Chen S.M.Chen Y.Chen Y.X.Chen j.Cheng Z.K.Cheng j.j.Cherwinka M.C.Chu j.P.Cummings O.Dalager f.S.Deng Y.Y.Ding M.V.Diwan T.Dohnal D.Dolzhikov j.Dove M.Dvorak D.A.Dwyer j.P.Gallo M.Gonchar G.H.Gong H.Gong M.Grassi W.Q.Gu j.Y.Guo L.Guo X.H.Guo Y.H.Guo Z.Guo R.W.Hackenburg S.Hans a M.He K.M.Heeger Y.K.Heng Y.K.Hor Y.B.Hsiung B.Z.Hu j.R.Hu T.Hu Z.j.Hu H.X.Huang j.H.Huang X.T.Huang Y.B.Huang P.Huber D.E.jaffe K.L.jen X.L.ji X.P.ji R.A.johnson D.jones L.Kang S.H.Kettel S.Kohn M.Kramer T.j.Langford j.Lee j.H.C.Lee R.T.Lei R.Leitner j.K.C.Leung f.Li H.L.Li j.j.Li Q.j.Li R.H.Li S.Li S.C.Li W.D.Li X.N.Li X.Q.Li Y.f.Li Z.B.Li H.Liang C.j.Lin G.L.Lin S.Lin j.j.Ling j.M.Link26 L.Littenberg B.R.Littlejohn j.C.Liu j.L.Liu j.X.Liu C.Lu H.Q.Lu K.B.Luk B.Z.Ma X.B.Ma X.Y.Ma Y.Q.Ma R.C.Mandujano C.Marshall K.T.McDonald R.D.McKeown Y.Meng j.Napolitano D.Naumov E.Naumova T.M.T.Nguyen j.P.Ochoa-Ricoux A.Olshevskiy H.-R.Pan j.Park S.Patton j.C.Peng C.S.j.Pun f.Z.Qi M.Qi X.Qian N.Raper j.Ren C.Morales Reveco R.Rosero B.Roskovec X.C.Ruan H.Steiner j.L.Sun T.Tmej1 K.Treskov W.-H.Tse C.E.Tull B.Viren V.Vorobel C.H.Wang j.Wang M.Wang N.Y.Wang R.G.Wang W.Wang W.Wang X.Wang Y.Wang Y.f.Wang Z.Wang Z.Wang Z.M.Wang H.Y.Wei L.H.Wei L.j.Wen K.Whisnant C.G.White H.L.H.Wong E.Worcester D.R.Wu f.L.Wu Q.Wu W.j.Wu D.M.Xia Z.Q.Xie Z.Z.Xing H.K.Xu j.L.Xu T.Xu T.Xue C.G.Yang L.Yang Y.Z.Yang H.f.Yao M.Ye M.Yeh B.L.Young H.Z.Yu Z.Y.Yu B.B.Yue V.Zavadskyi S.Zeng Y.Zeng L.Zhan C.Zhang f.Y.Zhang H.H.Zhang j.W.Zhang Q.M.Zhang S.Q.Zhang X.T.Zhang Y.M.Zhang Y.X.Zhang Y.Y.Zhang Z.j.Zhang Z.P.Zhang Z.Y.Zhang j.Zhao R.Z.Zhao L.Zhou H.L.Zhuang j.H.Zou Institute of Modern Physics East China University of Science and TechnologyShanghai 200337 University of Wisconsin MadisonWisconsin 53706 Brookhaven National Laboratory UptonNew York 11973 Department of Physics Nnational Taiwan UniversityTaipei Institute of High Energy Physics Beijing 100049 National United University Miao-Li Department of Engineering Physics Tsinghua UniversityBeijing 100048 Shenzhen University Shenzhen 518061 Sun Yat-Sen(Zhongshan)University Guangzhou 510275 North China Electric Power University Beijing 102206 Chinese University of Hong Kong Hongkong 999077 Siena College LoudonvilleNew York 12211 Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697 University of Science and Technology of China Hefei 230022 Charles University Faculty of Mathematics and PhysicsPrague joint Institute for Nuclear Research DubnaMoscow Region Department of Physics University of Illinois at Urbana-ChampaignUrbanaIllinois 61801 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Department of Physics Illinois Institute of TechnologyChicagoIllinois 60616 Beijing Normal University Beijing 100875 Department of Nuclear Science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 Wright Laboratory and Department of Physics Yale UniversityNew HavenConnecticut 06520 China Institute of Atomic Energy Beijing 102413 Shandong University Jinan 250002 Guangxi University No.100 Daxue East RoadNanning 530004 Center for Neutrino Physics Virginia TechBlacksburgVirginia 24061 Institute of Physics NCTUHsinchu Department of Physics University of CincinnatiCincinnatiOhio 45221 Department of Physics College of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 Dongguan University of Technology Dongguan 523808 Department of Physics University of CaliforniaBerkeleyCalifornia 94720 Department of Physics The University of Hong KongPokfulamHongkong 999077 School of Physics Nankai UniversityTianjin 300071 Department o

The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision *** positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay experiment,in combination with the fission rates of fissile isotopes in the reactor,is used to extract the positron energy spectra resulting from the fission of specific *** information can be used to produce a precise,data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya *** positron energy spectra are unfolded to obtain the antineutrino energy spectra by removing the contribution from detector response with the Wiener-SVD unfolding *** results are obtained with other unfolding methods.A technique to construct a data-based prediction of the reactor antineutrino energy spectrum is proposed and *** the reactor fission fractions,the technique can predict the energy spectrum to a 2%*** addition,we illustrate how to perform a rigorous comparison between the unfolded antineutrino spectrum and a theoretical model prediction that avoids the input model bias of the unfolding method.

关键词： reactor antineutrino energy spectrum Daya Bay application

A dynamic range extension system for LHAASOWCDA-1

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Radiation Detection Technology and Methods 2021年第4期5卷 520-530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 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.D’Ettorre Piazzoli X.j.Dong j.H.fan Y.Z.fan Z.X.fan j.fang K.fang C.f.feng L.feng S.H.feng Y.L.feng 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 Y.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.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.Ruffolo 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 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.P.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 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 TIANfU Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics BeijingChina University of Science and Technology of China Hefei 230026AnhuiChina 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 for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen UniversityZhuhai 519000GuangdongChina School of Physical Science and Technology Guangxi UniversityNanning 530004GuangxiChina Hebei Normal University Shijiazhuang 050024HebeiChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001HenanChina School of Astronomy and Space Science Nanjing UniversityNanjing 210023JiangsuChina Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Institute of frontier and Interdisciplinary Science Shandong UniversityQingdao 266237ShandongChina Key Laboratory for 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&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina College of Physics Sichuan UniversityChengdu 610065SichuanChina Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina School of Physics

Purpose The main scientific goal of LHAASO-WCDA is to survey gamma-ray sources with energy from 100 GeV to 30 *** observe high-energy shower events,especially to measure the energy spectrum of cosmic rays from 100 TeV to 10 PeV,a dynamic range extension system(WCDA++)is designed to use a 1.5-inch PMT with a dynamic range of four orders of magnitude for each cell in *** The dynamic range is extended by using these PMTs to measure the effective charge density in the core region of air shower events,which is an important parameter for identifying the composition of primary *** and Conclusion The system has been running for more than one *** this paper,the details of the design and performance of WCDA++are presented.

关键词： LHAASO-WCDA WCDA++ Water Cherenkov detector Performance