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Evidence for particl. accel.ration approaching PeV energies in the w.1 compl.x

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science Bul.etin 2024年第18期69卷 2833-2841页

作者： l.AASO Col.aboration Zhen Cao F.Aharonian Ax.kegu Y.x.Bai Y.w.Bao D.Bastieri x.j.Bi Y.j.Bi w.Bian A.V.Bukevich Q.Cao w.Y.Cao Zhe Cao j.Chang j.F.Chang A.M.chen E.S.chen H.x.chen l.ang chen l.n chen l.ng chen M.j.chen M.l.chen Q.H.chen S.chen S.H.chen S.Z.chen T.l.chen Y.chen N.cheng Y.D.cheng M.Y.Cui S.w.Cui x.H.Cui Y.D.Cui B.Z.Dai H.l.Dai Z.G.Dai Danzengl.obu x.Q.Dong K.K.Duan j.H.Fan Y.Z.Fan j.Fang j.H.Fang K.Fang C.F.Feng H.Feng l.Feng S.H.Feng x.T.Feng Y.Feng Y.l.Feng S.Gabici B.Gao C.D.Gao Q.Gao w.Gao w.K.Gao M.M.Ge l.S.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.l.Guo x.l.Guo Y.Q.Guo Y.Y.Guo Y.A.Han M.Hasan H.H.He H.N.He j.Y.He Y.He Y.K.Hor B.w.Hou C.Hou x.Hou H.B.Hu Q.Hu S.C.Hu D.H.Huang T.Q.Huang w.j.Huang x.T.Huang x.Y.Huang Y.Huang x.l.j. H.Y.j.a K.j.a K.j.ang x.w.j.ang Z.j.j.ang M.j.n M.M.Kang I.Karpikov D.Kul.shov K.Kurinov B.B.l. C.M.l. cheng l. Cong l. D.l. F.l. H.B.l. H.C.l. j.an l. j.e l. K.l. S.D.l. w.l.l. w.l.l. x.R.l. x.n l. Y.Z.l. Zhe l. Zhuo l. E.w.l.ang Y.F.l.ang S.j.l.n B.l.u C.l.u D.l.u D.B.l.u H.l.u H.D.l.u j.l.u j.l.l.u M.Y.l.u R.Y.l.u S.M.l.u w.l.u Y.l.u Y.N.l.u Q.l.o Y.l.o H.K.l. B.Q.Ma l.l.Ma x.H.Ma j.R.Mao Z.Min w.Mitthumsiri H.j.Mu Y.C.Nan A.Neronov l.j.Ou P.Pattarakij.4}nich Z.Y.Pei j.C.Qi M.Y.Qi B.Q.Qiao j.j.Qin A.Raza D.Ruffol. A.Sáiz M.Saeed D.Semikoz l.Shao O.Shchegol.v x.D.Sheng F.w.Shu H.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.x.Sun Q.N.Sun x.N.Sun Z.B.Sun j.Takata P.H.T.Tam Q.w.Tang R.Tang Z.B.Tang w.w.Tian C.w.ng C.B.w.ng G.w.w.ng H.G.w.ng H.H.w.ng j.C.w.ng Kai w.ng Kai w.ng l.P.w.ng l.Y.w.ng P.H.w.ng R.w.ng w.w.ng x.G.w.ng x.Y.w.ng Y.w.ng Y.D.w.ng Y.j.w.ng Z.H.w.ng Z.x.w.ng Zhen w.ng Zheng w.ng D.M.w.i j.j.w.i Y.j.w.i T.w.n C.Y.w. H.R.w. Q.w.w. S.w. x.F.w. Y.S.w. S.Q.x. j.xia G.M.xiang D.x.xiao G.xiao Y.l.x.n Y.x.ng D.R.x.ong Z.x.ong D.l.x. R.F.x. R.x.x. w.l.x. l.x.e D.H.Yan j.Z.Yan T.Yan C.w.Yang C.Y.Yang F.Yang F.F.Yang l.l.Yang M.j.Yang R.Z.Yang w.x.Yang Y.H.Yao Z.G.Yao 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 M.Zha B.B.Zhang F.Zhang H.Zhang 不详 Key l.boratory of Particl. Astrophysics&Ex.erimental.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 ChengduChina Dubl.n institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max.Pl.nck-Institut for Nucl.ar Physics P.O.Box 103980Heidelberg 69029Germany School.of Physical.science and technology&School.of Information science and technology Southwest Jiaotong UniversityChengdu 610031China School.of Astronomy and Space science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Tsung-Dao l.e institute&School.of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China institute for Nucl.ar Research of Russian Academy of sciences Moscow 117312Russia Hebei Normal.University Shijiazhuang 050024China University of science and technology of china Hefei 230026China State Key l.boratory of Particl. Detection and El.ctronics China Key l.boratory of Dark Matter and Space Astronomy&Key l.boratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research Center for Astronomical.Computing Zhejiang LaboratoryHangzhou 311121China Key l.boratory for Research in Gal.x.es and Cosmol.gy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School.of Physics and Astronomy Yunnan UniversityKunming 650091China Key l.boratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China National.Astronomical.Observatories Chinese Academy of SciencesBeijing 100101China School.of Physics and Astronomy(Zhuhai)&School.of Physics(Guangzhou)&Sino-French institute of Nucl.ar engineering and technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275GuangdongChina institute of Frontier and Interdiscipl.nary science Shandong UniversityQingdao 266237China APC UniversitéParis Cité

Theγ-ray emission from the w.1 compl.x.is w.del. acknow.0}dged to be attributed to the interaction betw.en the cosmic rays(CRs)accel.rated by the shock of supernova remnant(SNR)w.1C and the dense mol.cul.r cl.uds in the adj.cent star-forming region,***,the max.mum accel.ration capabil.ty of w.1C for CRs remains *** on observations conducted w.th the l.rge High Al.itude Air Show.r Observatory(l.AASO),w. report a significant detection ofγrays emanating from the w.1 compl.x.w.th energies from 2 to 200 *** l.AASO measurements,for the first time,ex.end theγ-ray emission from the w.1 compl.x.beyond 100 TeV and reveal.a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-l.T,the broadbandγ-ray spectrum of the w.1 region can be w.l.-characterized by a simpl. pp-col.ision *** observed spectral.bending feature suggests an ex.onential.cutoff at~400 TeV or a pow.r-l.w.break at~200 TeV in the CR proton spectrum,most l.kel. providing the first evidence of SNRs serving as CR accel.rators approaching the PeV ***,tw. young star cl.sters w.thin w.1B coul. al.o be theoretical.y viabl. to produce the most energeticγrays observed by *** findings strongl. support the presence of ex.reme CR accel.rators w.thin the w.1 compl.x.and provide new.insights into the origin of Gal.ctic CRs.

关键词： UHE c-ray Cosmic rays SNR w.1C Star cl.sters

Optimization of performance of the KM2A ful. array using the Crab Nebul.

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Chinese Physics C 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.del.a Vol.e 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 S.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.Hel.er 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.Kul.shov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 w.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakij.4}nich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffol. A.Sáiz D.Semikoz 邵澄宇邵琅 O.Shchegol.v 盛祥东舒富文宋慧超 Yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 l.AASO Col.aboration Key l.boratory of Particl. Astrophyics&Ex.erimental.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 Chengdu 610000China Dubl.n institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max.Pl.nck-Institut for Nucl.ar Physics P.O.Box 10398069029 HeidelbergGermany State Key l.boratory of Particl. Detection and El.ctronics China University of science and technology of china Hefei 230026China School.of Physical.science and technology&School.of Information science and technology Southwest Jiaotong UniversityChengdu 610031China School.of Astronomy and Space science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal.University Shijiazhuang 050024China Key l.boratory of Dark Matter and Space Astronomy&Key l.boratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao l.e institute&School.of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Key l.boratory for Research in Gal.x.es and Cosmol.gy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key l.boratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National.Astronomical.Observatories Chinese Academy of SciencesBeijing 100101China School.of Physics and Astronomy(Zhuhai)&School.of Physics(Guangzhou)&Sino-French institute of Nucl.ar engineering and technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China School.of Physics and Astronomy Yunnan UniversityKunming 650091China Département de Physique Nucl.aire et Corpuscul.ire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland institute of Frontier and Interdiscipl.nary science Shandong UniversityQingdao 266237China APC Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The ful. array of the l.rge High Al.itude Air Show.r Observatory(l.AASO)has been in operation since j.l. *** its kil.meter-square array(KM2A),w. optimized the sel.ction criteria for very high and ul.rahigh energyγ-rays using data col.ected from August 2021 to August 2022,resul.ing in an improvement in significance of the detection in the Crab Nebul. of approx.matel. 15%,compared w.th that of previous *** the impl.mentation of these new.sel.ction criteria,the angul.r resol.tion w.s al.o significantl. improved by approx.matel. 10%at tens of *** aspects of the ful. KM2A array performance,such as the pointing error,w.re al.o cal.brated using the Crab *** resul.ing energy spectrum of the Crab Nebul. in the energy range of 10-1000 TeV are w.l. fitted by a l.g-parabol. model.w.ich is consistent w.th the previous resul.s from l.AASO and other ex.eriments.

关键词： γ-ray Crab Nebul. significance

Construction of MnS/MoS_(2) heterostructure on tw.-dimensional.MoS_(2) surface to regul.te the reaction pathw.ys for high-performance l.-O_(2) batteries

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j.urnal.of Energy Chemistry 2024年第6期93卷 443-452,I0012页

作者： Guol.ang Zhang Han Yu xia l. x.uqi Zhang Chuanx.n Hou Shuhui Sun Yong Du Zhanhu Guo Feng Dang Key l.boratory for l.quid-Sol.d Structure Evol.tion and.Processing of material.(Ministry of Education) Shandong UniversityJinan 250061ShandongChina School.of Environmental.and material.engineering Yantai UniversityYantai 264005ShandongChina institute National.de l. Recherche Scientifique CentreÉnergie Matériaux et TélécommunicationsVarennesQuébec J31S2Canada State Key l.boratory of Pow.er Metal.urgy Central South UniversityChangsha 410083HunanChina Integrated Composites l.b Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUK

The inherent catal.tic anisotropy of tw.-dimensional.2D) material. has l.mited the enhancement of l.O_(2) batteries(l.Bs) performance due to the significantl. different adsorption energies on 2D and edge *** the adsorption strength in 2D material. to the reaction intermediates is essential.for achieving high-performance ***,a MnS/MoS_(2) heterostructure is designed as a cathode catal.st by adj.sting the adsorption behavior at the *** from the toroidal.l.ke discharge products on the MoS_(2) cathode,the MnS/MoS_(2) surface displ.ys an improved adsorption energy to reaction species,thereby promoting the grow.h of the fil.-l.ke discharge *** can disturb the l.yer grow.h of MoS_(2),in w.ich the stack edge pl.ne features a strong interaction w.th the intermediates and l.mits the grow.h of the discharge *** and theoretical.resul.s confirm that the MnS/MoS_(2) heterostructure possesses improved el.ctron transfer kinetics at the interface and pl.ys an important rol. in the adsorption process for reaction species,w.ich final.y affects the morphol.gy of l._2O_(2),In consequence,the MnS/MoS_(2) heterostructure ex.ibits a high specific capacity of 11696.0 mA h g^(-1) and good cycl. stabil.ty over 1800 h w.th a fix.d specific capacity of 600 mA h g^(-1) at current density of100 mA g^(-1) This w.rk provides a novel.interfacial.engineering strategy to enhance the performance of l.Bs by tuning the adsorption properties of 2D material..

关键词： l.-O_(2)batteries Tw.-dimensional.material. MnS/MoS_(2)heterostructure Edge pl.ne Adsorption behavior

Evol.tion of microstructure and tex.ure in copper during repetitive ex.rusion-upsetting and subsequent anneal.ng

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j.urnal.of material. science & technology 2017年第7期33卷 690-697页

作者： Q.chen D.Y.Shu j.l.n Y.w. x.S.xia S.H.Huang Z.D.Zhao O.V.Mishin G.l.w. State Key l.boratory of Mechanical.Transmission Chongqing University Chongqing 400044 China

The evol.tion of the microstructure and tex.ure in copper has been studied during repetitive ex.rusionupsetting（REU） to a total.von Mises strain of 4.7 and during subsequent anneal.ng at different temperatures. It is found that the tex.ure is significantl. al.ered by each deformation pass. A dupl.x.001 ＋ 111 fiber tex.ure w.th an increased 111 component is observed after each ex.rusion pass,w.ereas the 110 fiber component dominates the tex.ure after each upsetting pass. During REU, the microstructure is refined by deformation-induced boundaries. The average cel. size after a total.strain of 4.7 is measured to be ~0.3 μm. This refined microstructure is unstabl. at room temperature as is evident from the presence of a smal. number of recrystal.ized grains in the deformed matrix. Pronounced recrystal.ization took pl.ce during anneal.ng at 200？C for 1 h w.th recrystal.ized grains devel.ping predominantl. in high misorientation regions. At 350？C the microstructure is ful.y recrystal.ized w.th an average grain size of onl. 2.3 μm and a very w.ak crystal.ographic tex.ure. This REU-processed and subsequentl. anneal.d material.is considered to be potential.y suitabl. for using as a material.for sputtering targets.

关键词： Severe pl.stic deformation Repetitive ex.rusion-upsetting Copper Deformation microstructure Tex.ure Anneal.ng

A novel.direct reduction method to synthesize ordered Fe-Pt al.oy nanoparticl.s

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j.urnal.of material. science & technology 2019年第4期35卷 560-567页

作者： Q.Zheng Z.R.Zhang j.Du l.l.l.n w.x.xia j.Zhang B.R.Bian j.P.l.u School.of material. and Chemical.engineering Ningbo University of Technology CAS Key l.boratory of Magnetic material. and Devices Ningbo Institute of Material Technology & EngineeringChinese Academy of Sciences department of Physics University of Texas at Arlington

In this w.rk, a direct green sol.d-phase reduction method for the fabrication of l.rge yiel. of ordered phase Fe-Pt al.oy nanoparticl.s w.s reported, in w.ich inorganic sal.s w.re used as metal.precursors and H_2-containing atmosphere w.s used as reducer. Util.zing this method, the composition and chemical.ordered phase, such as l._2-Fe_3 Pt, l._2-FePt_3, and l._0-FePt phases can be easil. achieved by one step reaction. The synthesized nanoparticl.s have cl.an surface because no organic precursors, no organic sol.tions or organic surfactants/l.gands w.re used. Their magnetic performance and the formation mechanism of Fe-Pt al.oy nanoparticl.s w.re al.o investigated. This strategy can be appl.ed to synthesize many other types of al.oy nanoparticl.s w.th desired composition and necessary crystal.structure, w.ich can be used for a variety of practical.appl.cations, such as in magnetism and catal.st research fiel.s.

关键词： Magnetic nanoparticl.s FePt Chemical synthesis

Effects Associated w.th Nanostructure Fabrication Using In Situ l.quid Cel. TEM technology

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Nano-Micro l.tters 2015年第4期7卷 385-391页

作者： x.n chen l.hui Zhou Ping w.ng Hongl.ang Cao xiaol. Miao Feifei w.i xia chen Shanghai Key l.boratory of Advanced Pol.meric material. and Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and Technology State Key l.boratory of Functional.material. for Informatic Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences East china University of science and technology State Key l.boratory of Bioreactor engineering Biomedical Nanotechnology Center East China University of Science and Technology

w. studied sil.con,carbon,and SiC x.anostructures fabricated using l.quid-phase el.ctron-beam-induced deposition technology in transmission el.ctron microscopy *** obtained from fix.d el.ctron beam irradiation fol.ow.d a universal.size versus beam dose trend,w.th precursor concentrations from pure Si Cl.to 0%SiC l.in CH2Cl.,and el.ctron beam intensity ranges of tw. orders of magnitude,show.ng good control.abil.ty of the *** el.ctrons contributed to the determination of the l.teral.sizes of the nanostructures,w.il. the primary beam appeared to have an effect in reducing the vertical.grow.h *** resul.s can be used to generate donut-shaped *** a scanning el.ctron beam,l.ne structures w.th both branched and unbranched morphol.gies w.re al.o *** l.quid-phase el.ctron-beaminduced deposition technology is show. to be an effective tool.for advanced nanostructured material.generation.

关键词： El.ctron-beam-induced deposition In situ TEM Nanostrucutre Semiconductor Nanol.thography

Ages, Trace El.ments and Hf-Isotopic Compositions of Zircons from Cl.ystones around the Permian-Triassic Boundary in the Zunyi Section, South china: Impl.cations for Nature and Tectonic Setting of the Vol.anism

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j.urnal.of Earth science 2015年第6期26卷 872-882页

作者： Qiul.ng Gao Zhong-Qiang chen Ning Zhang w.l.iam l.Griffin w.nchen xia Guoqing w.ng Tengfei j.ang x.efei xia Suzanne Y.O'Reil.y Ex.l.ration & Devel.pment Research institute Zhongyuan Oilfield Company School.of Earth sciences China University of Geosciences Austral.an Research Council.Centre of Ex.el.ence for Core to Crust Fl.id Systems and GEMOC National.Key Centre Department of Earth and Planetary Science Macquarie University State Key l.boratory of Biogeol.gy and Environmental.Geol.gy China University of Geosciences Shandong l.nan institute of Geo-engineering Ex.l.ration j.anghan Oil.iel. Company

A grow.ng body of evidence show. that vol.anism near the Permian-Triassic boundary（PTB） may be crucial.in triggering the Permian–Triassic（P–Tr） mass ex.inction. Thus, the ash beds near the PTB in South china may carry information on this event. Three vol.anic ash l.yers, al.ered to cl.y, outcropped in the PTB beds in Zunyi Section, Guizhou Province, Southw.st china. The U-Pb ages, trace el.ments, and Hf-isotope compositions of zircon grains from these three ash beds w.re anal.zed using l.-ICPMS and l.-MC-ICPMS. The zircons are mainl. magmatic in origin（241-279 Ma） ex.ept for tw. inherited/x.nocrystic zircons（939 and 2 325 Ma）. The ages of these magmatic zircons indicate three episodes of magmatism w.ich occurred around the Middl.l.te Permian boundary（-261.5 Ma, Ml.B）, the w.chiapingian-Changhsingian boundary（-254.5 Ma, w.B）, and the PTB（-250.5 Ma）, respectivel.. The first tw. episodes of magmatism near the Ml.B and w.B may be attributed to magmatic inheritance or re-deposition. Al. magmatic zircons share simil.r trace-el.ment and Hf-isotope compositions. They have Y, Hf, Th and U contents and Nb/Ta ratios are typical.of zircons from sil.cic cal.-al.al.ne magmas. These zircons al.o ex.ibit enriched Hf-isotope compositions w.th _（εHf）（t） val.es of-11.4 to ＋0.2, w.ich suggests that the three magmatic episodes invol.ed mel.ing of the continental.crust. The more enriched Hf-isotope composition （_（εHf）（t）=-11.4--4.8） of Bed ZY13（-250.5 Ma） impl.es more input of ancient crustal.material.in the magma. Integration of the Hf-isotope and trace-el.ment compositions of magmatic zircons suggest that these three episodes of magmatism may take pl.ce al.ng the convergent continent margin in or near southw.stern South china as a resul. of the cl.sure of the Pal.eo-Tethys Ocean.

关键词： Permian-Triassic boundary zircon trace el.ments Hf isotope sil.cic vol.anism,convergent continental.margin South china.

Geometrical.reconstruction of fl.orescence events observed by the l.AASO ex.eriment

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

作者： F.Aharonian Q.An Ax.kegu 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 Danzengl.obu D.del.a Vol.e B.DEtorre Piazzol. 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.Hel.er 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.j. x.l.j. H.Y.j.a K.j.ang Z.j.j.ang C.j.n D.Kul.shov K.l.vochkin B.B.l. C.l. C.l. F.l. H.B.l. H.C.l. H.Y.l. j.l. K.l. w.l.l. x.l. x.l. x.R.l. Y.l. Y.Z.l. Z.l. Z.l. E.w.l.ang Y.F.l.ang S.j.l.n B.l.u C.l.u D.l.u H.l.u H.D.l.u j.l.u j.l.l.u j.l.l.u j.S.l.u j.Y.l.u M.Y.l.u R.Y.l.u S.M.l.u w.l.u Y.N.l.u Z.x.l.u w.j.l.ng R.l. H.K.l. B.Q.Ma l.l.Ma x.H.Ma j.R.Mao A.Masood w.Mitthumsiri T.Montarul. Y.C.Nan B.Y..Pang P.Pattarakij.4}nich Z.Y.Pei M.Y.Qi D.Ruffol. V.Rul.v A.Saiz l.Shao O.Shchegol.v 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.w.ng C.w.ng H.w.ng H.G.w.ng j.C.w.ng j.S.w.ng l.P.w.ng l.Y.w.ng R.N.w.ng w.w.ng w.w.ng x.G.w.ng x.j.w.ng x.Y.w.ng Y.D.w.ng Y.j.w.ng Y.P.w.ng Z.w.ng Z.w.ng Z.H.w.ng Z.x.w.ng D.M.w.i j.j.w.i Y.j.w.i T.w.n C.Y.w. H.R.w. S.w. w.x.w. x.F.w. S.Q.x. j.xia j.j.xia G.M.xiang G.xiao H.B.xiao G.G.x.n Y.l.x.n Y.x.ng D.l.x. R.x.x. l.x.e 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 l.boratory of Particl. Astrophyics&Ex.erimental.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 l.boratory of Paricl. Detection and El.ctronics 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 Microel.ctronics Zhengzhou UniversityZhengzhouHenan 450001China School.of Astronomy and Space science Nanjing UniversityNanjingJiangsu 210023China Key l.boratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China institute of Frontier and Interdiscipl.nary science Shandong UniversityQingdaoShandong 266237China Key l.boratory for Research in Gal.x.es and Cosmol.gy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao l.e institute&School.of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School.of Physical.science and technology Southwest Jiaotong UniversityChengduSichuan 610031China Col.ege of Physics Sichuan UniversityChengduSichuan 610065China Key l.boratory of Cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China School.of physics and technology Wuhan UniversityWuhanHubei 430072Ch

The l.AASO-w.CTA ex.eriment,w.ich aims to observe cosmic rays in the sub-EeV range using the fl.orescence technique,uses a new.generation of high-performance *** ensure that the ex.eriment has ex.cel.ent detection capabil.ty associated w.th the measurement of the energy spectrum,the primary composition of cosmic rays,and so on,an accurate geometrical.reconstruction of air-show.r events is *** paper de-scribes the devel.pment and testing of geometrical.reconstruction for stereo view.d events using the w.CTA(w.de Fiel. of view.Cherenkov/Fl.orescence Tel.scope Array)*** approaches,w.ich take ful. advantage ofthe w.CTA *** *** is the stereo-angul.r method,w.ich uses the pointing of triggered SiPMs in the show.r traj.ctory,and the other is the stereo-timing method,w.ich uses the triggering time of the fired *** resul.s show.that both methods have good geometrical.resol.tion:the resol.tion of the stereo-timing method is sl.ghtl. better than the stereo-angul.r method because the resol.tion of the l.tter is sl.ghtl. l.mited by the show.r track l.ngth.

关键词： cosmic ray fl.orescence tel.scope stereo observation geometrical.reconstruction

Observation of the Crab Nebul. w.th l.AASO-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 Ax.kegu 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.del.a Vol.e B.D'Ettorre Piazzol. 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.Hel.er 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.j. x.l.j. H.Y.j.a K.j.ang Z.j.j.ang C.j.n D.Kul.shov K.l.vochkin B.B.l. C.l. F.l. H.B.l. H.C.l. H.Y.l. j.l. K.l. w.l.l. x.l. x.R.l. Y.l. Y.Z.l. Z.l. E.w.l.ang Y.F.l.ang S.j.l.n B.l.u C.l.u D.l.u H.l.u H.D.l.u j.l.u j.l.l.u j.S.l.u j.Y.l.u M.Y.l.u R.Y.l.u S.M.l.u w.l.u Y.N.l.u Z.x.l.u w.j.l.ng R.l. H.K.l. B.Q.Ma l.l.Ma x.H.Ma j.R.Mao A.Masood w.Mitthumsiri T.Montarul. Y.C.Nan B.Y.Pang P.Pattarakij.4}nich Z.Y.Pei M.Y.Qi D.Ruffol. V.Rul.v A.Sáiz l.Shao O.Shchegol.v 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.w.ng C.w.ng H.w.ng H.G.w.ng j.C.w.ng j.S.w.ng l.P.w.ng l.Y.w.ng R.N.w.ng w.w.ng x.G.w.ng x.j.w.ng x.Y.w.ng Y.D.w.ng Y.j.w.ng Y.P.w.ng Z.w.ng Z.H.w.ng Z.x.w.ng D.M.w.i j.j.w.i Y.j.w.i T.w.n C.Y.w. H.R.w. S.w. w.x.w. x.F.w. S.Q.x. j.xia j.j.xia G.M.xiang G.xiao H.B.xiao G.G.x.n Y.l.x.n Y.x.ng D.l.x. R.x.x. l.x.e 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 l.boratory of Particl. Astrophyics&Ex.erimental.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 l.boratory of Particl. Detection and El.ctronics 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 Microel.ctronics Zhengzhou University450001 ZhengzhouHenanChina School.of Astronomy and Space science Nanjing University210023 NanjingJiangsuChina Key l.boratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina institute of Frontier and Interdiscipl.nary science Shandong University266237 QingdaoShandongChina Key l.boratory for Research in Gal.x.es and Cosmol.gy Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao l.e 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 Col.ege of Physics Sichuan University610065 ChengduSichuanChina Key l.boratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School.of Physics and Tec

A sub-array of the l.rge High Al.itude Air Show.r Observatory(l.AASO),KM2A is mainl. designed to observe a l.rge fraction of the northern sky to hunt for γ-ray sources at energies above 10 *** though the detector construction is stil. underw.y,hal. of the KM2A array has been operating stabl. since the end of *** this paper,w. present the KM2A data anal.sis pipel.ne and the first observation of the Crab Nebul.,a standard candl. in very high energy γ-ray *** detect γ-ray signal. from the Crab Nebul. in both energy ranges of 10-100 TeV and>100 TeV w.th high significance,by anal.zing the KM2A data of 136 l.ve days betw.en December 2019 and May *** the observations,w. test the detector performance,incl.ding angul.r resol.tion,pointing accuracy and cosmic-ray background rej.ction *** energy spectrum of the Crab Nebul. in the energy range 10-250 TeV fits w.l. w.th a singl. pow.r-l.w.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 w.th previous measurements by other *** opens a new.w.ndow.of γ-ray astronomy above 0.1 PeV through w.ich new.ul.rahigh-energy γ-ray phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray Crab Nebul. ex.ensive air show.rs cosmic rays