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Magnetic and Transport Properties of Mn_(0.98)Cr_(0.02)Te Epitaxial Films Grown on Al_2O_3 Substrates

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Journal of Materials Science & Technology 2014年第2期30卷 103-106页

作者： z.h.wang D.Y.Geng J.Li Y.B.Li z.D.zhang Shenyang National Laboratory for Materials Science Institute of Metal Researchand International Centre for Materials PhysicsChinese Academy of Sciences Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of Sciences

The epitaxial Mno0.98Cr0.02Te films on single crystal Al2O3 （0001） substrates were prepared by pulsed laser deposition. The X-ray diffraction and scanning electron microscopy results showed that the good continuous epitaxial film was obtained with substrate temperature of 500 ℃. When the substrate temperature reached 700 ℃, the film was island growth and the manganese oxides phase appeared. The temperature dependence of both the magnetization and electrical resistance showed a sharp rise at around 60 K due to the magnetoelastic coupling. The temperature dependence of the electrical resistance of Mno0.98Cr0.02Te provided evidence for a transition from the metallic to semiconducting state at 305 K due to the spin disorder scattering with a large contribution from the influence of magnon drag.

关键词： Magnetic properties Mno0.98Cr0.02Te films X-ray diffraction Epitaxial film

Designing ultrastrong maraging stainless steels with improved uniform plastic strain via controlled precipitation of coherent nanoparticles

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Journal of Materials Science & Technology 2021年第34期93卷 60-70页

作者： z.h.wang B.Niu Q.wang C.Dong J.C.Jie T.M.wang T.G.Nieh Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Department of Materials Science and Engineering The University of TennesseeKnoxville37996TennesseeUSA

The development of ultrastrong maraging stainless steels(MSSs)is always in high ***,traditional high-strength MSSs generally exhibit early plastic instability with a low uniform strain since the precipitated nanoparticles are non-coherent with the body-centered-cubic(BCC)lath martensitic ***,we design a novel ultrahigh strength MSS(Fe-5.30 Cr-13.47 Ni-3.10 Al-1.22 Mo-0.50 W-0.23 Nb-0.03 C-0.005 B,wt.%)using a cluster formula approach.A fabulous microstructure consisting of a uniform distribution of high-density coherent B2-Ni Al nanoprecipitates(3-5 nm)in BCC martensitic matrix was successfully *** alloy has not only an exceedingly high ultimate tensile strength of 2.0 GPa,but also a decent uniform elongation of 4.2%-5.1%,which is almost triple of the value observed in existing *** present an in-depth discussion on the origins of ultrahigh strength and uniform plastic strain in the new alloy to validate our design strategy and further offer a new pathway to exploit highperformance MSSs.

关键词： Maraging stainless steel Ultrahigh strength Coherent precipitation Strengthening mechanisms Uniform deformation

Construction and expression of a heterologous protein in Lactococcus lactis by using the Nisin-controlled gene expression system:The case of the PRRSV ORF6 gene

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Construction and expression of a heterologous protein in Lac...

中国畜牧兽医学会动物微生态学分会第十一次全国学术研讨会暨第五届会员代表大会

作者： Y.L.wang z.h.wang X.Y.zeng Isotope Research Laboratory College of Life and Basic SciencesSichuan Agricultural University Department of Animal and Veterinary Science Chengdu Vocational College of Agricultural Science and Technology

The porcine reproductive and respiratory syndrome virus(PRRSV) continues to be a threat,exerting significant economic effects on the swine industry ***,none of the current commercially available vaccines can completely prevent respiratory infection,trans-placental transmission,pig-to-pig transmission of the virus,or maintain immune protection in *** study provides information on PRRSV and a review of available options for PRRS control strategies based on its pathogenic characteristics,immune properties,and biological *** this study,the nisin-controlled expression(NICE) system of Lactococcus lactis was selected as a vector to express the ORF6 gene of ***-grade recombinant,*** PNz8149/Nz3900-M/PRRS,which contained the lactose operon,was successfully *** molecular weight of the expressed recombinant protein was approximately 19 ***,the recombinant protein was located on the surface of *** and showed reactogenicity with the antibody against *** of this study are expected to lay a theoretical foundation for development of genetically engineered *** mucosal vaccines and to provide information related to its immune activity and adjuvant effects.

关键词： Lactococcus lactis Nisin controlled expression system Porcine reproductive and respiratory syndrome virus(PRRSV) ORF6

Controllable single-photon frequency converter via a one-dimensional waveguide

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Controllable single-photon frequency converter via a one-dim...

第十六届全国量子光学学术报告会

作者： z.h.wang Lan zhou Yong Li C.P.Sun Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

＜正＞We propose a single-photon frequency converter via a one-dimensional waveguide coupled to a three-level V-type *** on-demand classical driving field is used to couple to the atom,allowing it to absorb a photon with a given frequency and then emit a photon with a different carried *** study such a single-photon frequency conversion mechanism in two kinds of realistic physical systems:the system of coupled-resonator waveguide with cosine dispersion relation and the one of

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Assessment of allelopathic potential of aqueous extracts of Praxelis (Praxelis clematidea) under laboratory conditions

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Assessment of allelopathic potential of aqueous extracts of ...

中国第二届植物化感作用学术研讨会暨中国植物保护学会植物化感作用专业委员会成立大会

作者： z.h.wang P.ChRISTIE Q.B.ChEN G.Y.LAN F.AN X.L.LI Department of Plant Nutrition China Agricultural University Agricultural and Environmental Science Department Queen's University BelfastNewforge LaneBelfast BT9 5PXUK

Allelopathic effects of aqueous extracts of fresh Praxelis (Praxelis clematidea) material on germination and of extracts from fresh and dry Praxelis material and soil on initial seedling growth were studied in four crops: Chinese cabbage (Brassica campestris L. ssp. Pekinensis (Lour.) Olsson), radish (Raphanus sativus L.), rice (Oryza sativa L.) and Stylosanthes CIAT184 (Stylosanthes guianensis cv. ’Reyan No. 2’). Allelopathic effects of Praxelis extracts on initial seedling growth of radish were also studied at two different developmental stages and in various habitats. All fresh Praxelis aqueous extracts inhibited seed germination of all four test species. Leaf, flower and whole plant extracts exhibited greater phytotoxicity than those from other plant parts. The allelochemicals may be released mainly by leaves and flowers. Dry matter Praxelis extracts severely inhibited root growth of the crop species with a similar trend with extracts of fresh material at lower concentrations. Soil extracts had no discernible adverse effect on the test species and actually showed stimulatory effects on some parameters of some species. Allelopathic effects of extracts from immature and flowering Praxelis showed no substantially different effects on radish. Allelopathic activity of P. clematidea increased under adverse (arid) conditions under which more allelochemicals may have been released.

关键词： aqueous extracts invasive weed seed germination seedling growth Praxelis clematidea.

Consolidation Test with Continuous Loading

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Consolidation Test with Continuous Loading

作者： z.h.wang Associate Professor F.S.zhang Lecturer Beijing Postgraduate School,North China Institute of Water Conservancy and hydro-electric Power,Beijing

＜正＞Five kinds of soils with medium to high plasticity were used to perform controlled gradient（CGC）and routine（Std）consolidation *** comparisons show that the testing duration of the former method is much shorter than that of the later,yet their results are very *** feasibility of CGC is discussed and recommendations are made for testing procedures.

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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

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