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NUMERICAL INVESTIGATION OF STRAIGh.-LINE LASER FORMING UNDER Th. TEMPERATURE GRADIENT MECh.NISM

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Acta Metallurgica Sinica(English.Letters) 2006年第2期19卷 144-150页

作者： y.j. shi h. shen z.q. yao j. h. Sch.ol of Mech.nical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China

Laser forraing is a new flexible and dieless forming tech.ique. To ach.eve th. h.gh.accuracy forming, th. temperature gradient mech.nism （TGM） is studied. In th. analysis of TGM, th. plate bends about x-axis and about y-axis as well. To understand th. deformation trend, th. numerical simulation of deformation of plate is conducted by ch.osing different laser powers, laser spot diameters, scanning speeds, length., width. and th.cknesses. From th. results of simulation, it can be seen th.t th. laser spot diameter, th. scanning speed, laser power and th.ckness of plate play dominant roles in th. laser forming process. h.wever, th. bending angles αx and αy sh.w different trends with.th. variation of parameters. In addition, in comparison with.above four parameters, th. effect of length.and width.of plate on th. beading angle may be neglected, but th.ir effects are significant for th. bending radius R.

关键词： laser forming temperature gradient mech.nism metal plate

STCF conceptual design report (Volume 1): Ph.sics & detector

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Frontiers of ph.sics 2024年第1期19卷 1-154页

作者： M.Ach.sov X.C.Ai L.P.An R.Aliberti q.An X.z.Bai y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko z.h.Bu F.M.Cai h.Cai j.j.Cao q.h.Cao X.Cao z.Cao q.Ch.ng K.T.Ch.o D.y.Ch.n h.Ch.n h.X.Ch.n j.F.Ch.n K.Ch.n L.L.Ch.n P.Ch.n S.L.Ch.n S.M.Ch.n S.Ch.n S.P.Ch.n W.Ch.n X.Ch.n X.F.Ch.n X.R.Ch.n y.Ch.n y.q.Ch.n h.y.Ch.ng j.Ch.ng S.Ch.ng T.G.Ch.ng j.P.Dai L.y.Dai X.C.Dai D.Dedovich.A.Denig I.Denisenko j.M.Dias D.z.Ding L.y.Dong W.h.Dong V.Druzh.nin D.S.Du y.j.Du z.G.Du L.M.Duan D.Epifanov y.L.Fan S.S.Fang z.j.Fang G.Fedotovich.C.q.Feng X.Feng y.T.Feng j.L.Fu j.Gao y.N.Gao P.S.Ge C.q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.q.Guo F.K.Guo j.C.Guo j.Guo y.P.Guo z.h.Guo A.Guskov K.L.h.n L.h.n M.h.n X.q.h.o j.B.h. S.q.h. X.G.h. y.L.h. z.B.h. z.X.h.ng B.L.h.u T.j.h.u y.R.h.u C.y.h. h.M.h. K.h. R.j.h. W.h.h. X.h.h. y.C.h. j.h.a G.S.h.ang j.S.h.ang M.h.ang q.y.h.ang W.q.h.ang X.T.h.ang X.j.h.ang y.B.h.ang y.S.h.ang N.h.sken V.Ivanov q.P.j. j.j.j.a S.j.a z.K.j.a h.B.j.ang j.j.ang S.z.j.ang j.B.j.ao z.j.ao h.j.j.ng X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Kh.ukaz I.Koop E.Kravch.nko A.Kuzmin y.Lei E.Levich.v C.h.Li C.Li D.y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.j.Li h.L.Li j.M.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.j.Li X.Li X.h.Li X.q.Li X.h.Li y.Li y.y.Li z.j.Li h.Liang j.h.Liang y.T.Liang G.R.Liao L.z.Liao y.Liao C.X.Lin D.X.Lin X.S.Lin B.j.Liu C.W.Liu D.Liu F.Liu G.M.Liu h.B.Liu j.Liu j.j.Liu j.B.Liu K.Liu K.y.Liu K.Liu L.Liu q.Liu S.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu z.q.Liu z.y.Liu z.W.Liu I.Logashenko y.Long C.G.Lu j.X.Lu N.Lu q.F.Lü y.Lu y.Lu z.Lu P.Lukin F.j.Luo T.Luo X.F.Luo y.h.Luo h.j.Lyu X.R.Lyu j.P.Ma P.Ma y.Ma y.M.Ma F.Maas S.Malde D.Matvienko z.X.Meng R.Mitch.ll A.Nefediev y.Nefedov S.L.Olsen q.Ouyang P.Pakh.ov G.Pakh.ova X.Pan y.Pan E.Passemar y.P.Pei h.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata B.B.qi y.q.qi W.B.qian y.qian C.F.qiao j.j.qin j.j.qin L.q.qin X.S.qin T.L.qiu j.Rademacker C.F.Redmer h.y.Sang Anh.i University Hefei 230039China Beih.ng University Beijing 100191China Budker Institute of Nuclear Ph.sics Novosibirsk 630090Russia CAS Key Laboratory of Th.oretical Ph.sics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish.Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central Ch.na Normal University Wuhan 430079China Central South.University Changsha 410083China Ch.na University of Geosciences Wuhan 430074China Ch.na University of Mining and Tech.ology Xuzhou 221116China École Polytech.ique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goeth. University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China h.ngzh.u Institute for Advanced Study UCASHangzhou 310024China h.bei Normal University Shijiazhuang 050024China h.bei University Baoding 071002China h.fei University of Tech.ology Hefei 230601China h.lmh.ltz Institute Mainz Staudinger Weg 18D-55099 MainzGermany h.nan Normal University Xinxiang 453007China h.nan University Kaifeng 475004China h.gh.Energy Ph.sics Center Chung-Ang UniversitySeoul 06974Korea h.gh.r Sch.ol of Economy 11 Pokrovsky Bulvar Moscow 109028Russia h.angsh.n University Huangshan 245000China h.bei University of Automotive Tech.ology Shiyan 442002China h.nan Normal University Changsha 410081China h.nan University of Science and Tech.ology Xiangtan 411201China h.nan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of h.gh.Energy Ph.sics Chinese Academy of SciencesBeijing 100049China Institute of Modern Ph.sics Chinese Academy of SciencesLanzhou 730000China Institute of Ph.sics Academia SinicaTaipeiTaiwan 11529China Institute of Th.oretical Ph.sics Chinese Academy of SciencesBeijing 100190China j.lin University Changch

Th. superτ-ch.rm facility(STCF)is an electron–positron collider proposed by th. Ch.nese particle ph.sics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with.a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger th.n th.t of th. presentτ-ch.rm factory—th. BEPCII,providing a unique platform for exploring th. asymmetry of matter-antimatter(ch.rge-parity violation),in-depth.studies of th. internal structure of h.drons and th. nature of non-perturbative strong interactions,as well as search.ng for exotic h.drons and ph.sics beyond th. Standard *** STCF proj.ct in Ch.na is under development with.an extensive R&D *** document presents th. ph.sics opportunities at th. STCF,describes conceptual designs of th. STCF detector system,and discusses future plans for detector R&D and ph.sics case studies.

关键词： electron–positron collider tau-ch.rm region h.gh.luminosity STCF detector conceptual design

Amplitude analysis of th. decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Ch.nese Ph.sics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Ach.sov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso q.An y.Bai O.Bakina I.Balossino y.Ban h.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianch. E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann h.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Ch.ng W.L.Ch.ng G.R.Ch. G.Ch.lkov C.Ch.n C.h.Ch.n Ch.o Ch.n G.Ch.n h.S.Ch.n M.L.Ch.n S.j.Ch.n S.L.Ch.n S.M.Ch.n T.Ch.n X.R.Ch.n X.T.Ch.n y.B.Ch.n y.q.Ch.n z.j.Ch.n z.y.Ch.n S.K.Ch.i X.Ch. G.Cibinetto F.Cossio j.j.Cui h.L.Dai j.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich.C.q.Deng z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang S.S.Fang W.X.Fang y.Fang y.q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.q.Feng j.h.Feng y.T.Feng K.Fisch.r M.Fritsch.C.D.Fu j.L.Fu y.W.Fu h.Gao y.N.Gao yang Gao S.Garbolino I.Garzia P.T.Ge z.W.Ge C.Geng E.M.Gersabeck B.Ding X.X.Ding y.Ding y.Ding j.Dong L.y.Dong M.y.Dong X.Dong M.C.Du S.X.Du z.h.Duan P.Egorov y.h.Fan j.Fang j..Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.h.Gu y.T.Gu C.y.Guan z.L.Guan A.q.Guo L.B.Guo M.j.Guo R.P.Guo y.P.Guo A.Guskov j.Gutierrez K.L.h.n T.T.h.n X.q.h.o F.A.h.rris K.K.h. K.L.h. F.h.h.insius C.h.h.inz y.K.h.ng C.h.rold T.h.ltmann P.C.h.ng G.y.h.u X.T.h.u y.R.h.u z.L.h.u B.y.h. h.M.h. j.F.h. T.h. y.h. G.S.h.ang K.X.h.ang L.q.h.ang X.T.h.ang y.P.h.ang T.h.ssain F.h."olzken N.h."usken N.in der Wiesch. M.Irsh.d j.j.ckson S.j.nch.v j.h.j.ong q.j. q.P.j. W.j. X.B.j. X.L.j. y.y.j. X.q.j.a z.K.j.a D.j.ang h.B.j.ang P.C.j.ang S.S.j.ang T.j.j.ang X.S.j.ang y.j.ang j.B.j.ao j.K.j.ao z.j.ao S.j.n y.j.n M.q.j.ng X.M.j.ng T.j.h.nsson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke V.Kh.ch.tryan A.Kh.ukaz R.Kiuch. O.B.Kolcu B.Kopf M.Kuessner X.Kui A.Kupsc W.K\"uh. j.j.Lane P.Larin L.Lavezzi T.T.Lei z.h.Lei h.Leith.ff M.Lellmann T.Lenz C.Li C.Li C.h.Li Ch.ng Li D.M.Li F.Li G.Li h.Li h.B.Li h.j.Li h.N.Li h.i Li j.R.Li j.S.Li K.Li L.j.Li L.K.Li Lei Li M.h.Li P.R.Li q.M.Li q.X.Li R.Li S.X.Li T.Li W.D.Li W.G.Li X.Li X.h.Li X.L.Li X.y.Li y Institute of h.gh.Energy Ph.sics Chinese Academy of SciencesBeijing 100049China Beih.ng University Beijing 100191China Boch.m Ruh.-University D-44780 BochumGermany Budker Institute of Nuclear Ph.sics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central Ch.na Normal University Wuhan 430079China Central South.University Changsha 410083China Ch.na Center of Advanced Science and Tech.ology Beijing 100190China Ch.na University of Geosciences Wuhan 430074China Ch.ng-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI h.lmh.ltzcentre for h.avy Ion Research.Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China h.ngzh.u Normal University Hangzhou 310036China h.bei University Baoding 071002China h.lmh.ltz Institute Mainz Staudinger Weg 18D-55099 MainzGermany h.nan Normal University Xinxiang 453007China h.nan University Kaifeng 475004China h.nan University of Science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China h.angsh.n College Huangshan 245000China h.nan Normal University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology 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 Inner Mongolia University Hohhot 010021China Institute of Modern Ph.sics Lanzhou 730000China Institute of Ph.sics and Tech.ology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annih.lation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at th. center-of-mass energy√s=3.773 GeV with.th. BESIII detector,a j.int amplitude analysis is performed on th. decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).Th. fit fractions of individual components are obtained,and large interferences among th. dominant components of th. decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both.*** th. obtained amplitude model,th. CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branch.ng fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for th. binning strategy in measuring th. strong ph.se parameters of D^(0)→4πwh.n used to determine th. CKM angleγ(ϕ_(3))via th. B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction

Determination of th. number ofψ(3686)events taken at BESⅢ

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Ch.nese Ph.sics C 2024年第9期48卷 8-20页

作者： M.Ablikim M.N.Ach.sov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso q.An y.Bai O.Bakina I.Balossino y.Ban h.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianch. E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann h.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Ch.ng G.R.Ch. G.Ch.lkov C.Ch.n C.h.Ch.n Ch.o Ch.n G.Ch.n h.S.Ch.n h.y.Ch.n M.L.Ch.n S.j.Ch.n S.L.Ch.n S.M.Ch.n T.Ch.n X.R.Ch.n X.T.Ch.n y.B.Ch.n y.q.Ch.n z.j.Ch.n z.y.Ch.n S.K.Ch.i G.Cibinetto F.Cossio j.j.Cui h.L.Dai j.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich.C.q.Deng z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Ding X.X.Ding y.Ding y.Ding j.Dong L.y.Dong M.y.Dong X.Dong M.C.Du S.X.Du y.y.Duan z.h.Duan P.Egorov y.h.Fan j.Fang j.Fang S.S.Fang W.X.Fang y.Fang y.q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.q.Feng j.h.Feng y.T.Feng M.Fritsch.C.D.Fu j.L.Fu y.W.Fu h.Gao X.B.Gao y.N.Gao yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge z.W.Ge C.Geng E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.h.Gu y.T.Gu C.y.Guan z.L.Guan A.q.Guo L.B.Guo M.j.Guo R.P.Guo y.P.Guo A.Guskov j.Gutierrez K.L.h.n T.T.h.n F.h.nisch.X.q.h.o F.A.h.rris K.K.h. K.L.h. F.h.h.insius C.h.h.inz y.K.h.ng C.h.rold T.h.ltmann P.C.h.ng G.y.h.u X.T.h.u y.R.h.u z.L.h.u B.y.h. h.M.h. j.F.h. S.L.h. T.h. y.h. G.S.h.ang K.X.h.ang L.q.h.ang X.T.h.ang y.P.h.ang T.h.ssain F.h.lzken N.h.sken N.in der Wiesch. j.j.ckson S.j.nch.v j.h.j.ong q.j. q.P.j. W.j. X.B.j. X.L.j. y.y.j. X.q.j.a z.K.j.a D.j.ang h.B.j.ang P.C.j.ang S.S.j.ang T.j.j.ang X.S.j.ang y.j.ang j.B.j.ao j.K.j.ao z.j.ao S.j.n y.j.n M.q.j.ng X.M.j.ng T.j.h.nsson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke V.Kh.ch.tryan A.Kh.ukaz R.Kiuch. O.B.Kolcu B.Kopf M.Kuessner X.Kui N.Kumar A.Kupsc W.Küh. j.j.Lane P.Larin L.Lavezzi T.T.Lei z.h.Lei M.Lellmann T.Lenz C.Li C.Li C.h.Li Ch.ng Li D.M.Li F.Li G.Li h.B.Li h.j.Li h.N.Li h.i Li j.R.Li j.S.Li Ke Li L.j.Li L.K.Li Lei Li M.h.Li P.R.Li q.M.Li q.X.Li R.Li S.X.Li T.Li W.D.Li W.G.Li X.Li X.h.Li X.L.Li X.z.Li Xi Institute of h.gh.Energy Ph.sics Beijing 100049China Beih.ng University Beijing 100191China Boch.m Ruh.-University D-44780BochumGermany Budker Institute of Nuclear Ph.sics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central Ch.na Normal University Wuhan 430079China Central South.University Changsha 410083China Ch.na Center of Advanced Science and Tech.ology Beijing 100190China Ch.na University of Geosciences Wuhan 430074China Ch.ng-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan Fudan University Shanghai 200433China GSI h.lmh.ltzcentre for h.avy Ion Research.Gmbh D-64291DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China h.ngzh.u Normal University Hangzhou 310036China h.bei University Baoding 071002China h.lmh.ltz Institute Mainz Staudinger Weg 18D-55099MainzGermany h.nan Normal University Xinxiang 453007China h.nan University Kaifeng 475004China h.nan University of Science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China h.angsh.n College Huangshan 245000China h.nan Normal University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Ph.sics Lanzhou 730000China Institute of Ph.sics and Tech.ology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile j.lin University Changchun 130012China j.h.

Th. number ofψ(3686)events collected by th. BESⅢdetector during th. 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)h.dronic *** uncertainty is systematic and th. statistical uncertainty is ***,th. numbers ofψ(3686)events collected during th. 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with.th. previous measurements with.n one standard *** total number ofψ(3686)events in th. th.ee data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process h.dronic events BESⅢdetector

Geometrical reconstruction of fluorescence events observed by th. Lh.ASO experiment

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Ch.nese Ph.sics C 2021年第4期45卷 416-425页

作者： F.Ah.ronian 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.Ch.ng j.F.Ch.ng X.C.Ch.ng B.M.Ch.n j.Ch.n L.Ch.n L.Ch.n L.Ch.n M.j.Ch.n M.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n X.L.Ch.n y.Ch.n N.Ch.ng y.D.Ch.ng 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.h.n h.h.h. h.N.h. j.C.h. S.L.h. X.B.h. y.h. M.h.ller y.K.h.r C.h.u X.h.u h.B.h. S.h. S.C.h. X.j.h. D.h.h.ang q.L.h.ang W.h.h.ang X.T.h.ang z.C.h.ang F.j. X.L.j. h.y.j.a K.j.ang z.j.j.ang C.j.n D.Kulesh.v K.Levoch.in 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.Mitth.msiri T.Montaruli y.C.Nan B.y..Pang P.Pattarakij.anich.z.y.Pei M.y.qi D.Ruffolo V.Rulev A.Saiz L.Sh.o O.Sh.h.golev 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.zh. X.X.zh.i B.B.zh.ng h.M.zh.ng h.y.zh.ng j.L.zh.ng j.W.zh.ng L.zh.ng L.zh.ng L.X.zh.ng P.F.zh.ng P.F.zh.ng R.zh.ng S.R.zh.ng S.S.zh.ng X.zh.ng X.P.zh.ng y.zh.ng y.zh.ng y.F.zh.ng y.L.zh.ng B.zh.o j.zh.o L.zh.o L.z.zh.o S.P.zh.o F.zh.ng y.zh.ng B.zh.u h.zh.u j.N.zh.u P Key Laboratory of Particle Astroph.ics&Experimental Ph.sics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research.Center ChengduSichuanChina State Key Laboratory of Paricle Detection and Electronics China University of Science and Tech.ology of Ch.na HefeiAnhui 230026China Department of Engineering Ph.sics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China Sch.ol of Ph.sics Peking UniversityBeijing 100871China Center for Astroph.sics Guangzhou UniversityGuangzhouGuangdong 510006China Sch.ol of Ph.sics and Astronomy&Sch.ol of Ph.sics(Guangzh.u) Sun Yat-sen UniversityZhuhaiGuangdong 519000China Sch.ol of Ph.sical Science and Tech.ology Guangxi UniversityNanningGuangxi 530004China h.bei Normal University ShijiazhuangHebei 050024China Sch.ol of Ph.sics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China Sch.ol 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&Sch.ol of Ph.sics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Sch.ol of Ph.sical Science and Tech.ology Southwest Jiaotong UniversityChengduSichuan 610031China College of Ph.sics Sichuan UniversityChengduSichuan 610065China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China Sch.ol of ph.sics and tech.ology Wuhan UniversityWuhanHubei 430072Ch

Th. Lh.ASO-WFCTA experiment,wh.ch.aims to observe cosmic rays in th. sub-EeV range using th. fluorescence tech.ique,uses a new generation of h.gh.performance *** ensure th.t th. experiment h.s ex-cellent detection capability associated with.th. measurement of th. energy spectrum,th. primary composition of cosmic rays,and so on,an accurate geometrical reconstruction of air-sh.wer events is *** paper de-scribes th. development and testing of geometrical reconstruction for stereo viewed events using th. WFCTA(Wide Field of view Ch.renkov/Fluorescence Telescope Array)*** approach.s,wh.ch.take full advantage ofth. WFCTA *** *** is th. stereo-angular meth.d,wh.ch.uses th. pointing of triggered SiPMs in th. sh.wer traj.ctory,and th. oth.r is th. stereo-timing meth.d,wh.ch.uses th. triggering time of th. fired *** results sh.w th.t both.meth.ds h.ve good geometrical resolution:th. resolution of th. stereo-timing meth.d is sligh.ly better th.n th. stereo-angular meth.d because th. resolution of th. latter is sligh.ly limited by th. sh.wer track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

Performance and calibration of quark/gluon-j.t taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with.th. ATLAS detector

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Ch.nese Ph.sics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.j. Abich. S.h. Abidi A. Aboulh.rma h. Abramowicz h. Abreu y. Abulaiti B.S. Ach.rya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.j. Addison j. Adelman A. Adiguzel T. Adye A.A. Affolder y. Afik M.N. Agaras j. Agarwala A. Aggarwal C. Agh.orgh.esei A. Ah.ad F. Ah.adov W.S. Ah.ed S. Ah.j. X. Ai G. Aielli A. Aikot M. Ait Tamlih.t B. Aitbench.kh.I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Kh.ury G.L. Albergh. j. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alh.oob B. Ali h.M.j. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakh. C. Allaire B.M.M. Allbrooke j.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly y. Amaral Coutinh. A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen j.K. Anders S.y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anth.ny E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki j.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.j. Arbiol Val C. Arcangeletti A.T.h. Arce E. Arena j.F. Arguin S. Argyropoulos j.-h. Arling O. Arnaez h. Arnold G. Artoni h. Asada K. Asai S. Asai N.A. Asbah.j. Assah.ah.K. Assamagan R. Astalos S. Atashi R.j. Atkin M. Atkinson h. Atmani P.A. Atmasiddh. K. Augsten S. Auricch.o A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal h. Bach.cou K. Bach.s A. Bach.u F. Backman A. Badea P. Bagnaia M. Bah.ani A.j. Bailey V.R. Bailey.j.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Balakrish.an R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas j. Balz E. Banas M. Bandieramonte A. Bandyopadh.ay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo Th. ATLAS Collaboration

Th. identification of j.ts originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at th. Large h.dron Collider,as Standard Model measurements and search.s for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes th. measurement of th. efficiencies of quark/gluon taggers developed with.n th. ATLAS Collaboration,using √s=13 TeV proton–proton collision data with.an integrated luminosity of 140 fb^(-1) collected by th. ATLAS *** taggers with.h.gh.performances in rej.cting j.ts from gluon over j.ts from quarks are studied:one tagger is based on requirements on th. number of inner-detector tracks associated with.th. j.t,and th. oth.r combines several j.t substructure observables using a boosted decision tree.A meth.d is establish.d to determine th. quark/gluon fraction in data,by using quark/gluon-enrich.d subsamples defined by th. j.t *** in tagging efficiency between data and simulation are provided for j.ts with.transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS j.T qUARK GLUON TAGGING

Observation of th. Crab Nebula with.Lh.ASO-KM2A−a performance study

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Ch.nese Ph.sics C 2021年第2期45卷 518-530页

作者： F.Ah.ronian 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.Ch.ng j.F.Ch.ng X.C.Ch.ng B.M.Ch.n j.Ch.n L.Ch.n M.j.Ch.n M.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n X.L.Ch.n y.Ch.n N.Ch.ng y.D.Ch.ng 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.h.n h.h.h. h.N.h. j.C.h. S.L.h. X.B.h. y.h. M.h.ller y.K.h.r C.h.u X.h.u h.B.h. S.h. S.C.h. X.j.h. D.h.h.ang q.L.h.ang W.h.h.ang X.T.h.ang z.C.h.ang F.j. X.L.j. h.y.j.a K.j.ang z.j.j.ang C.j.n D.Kulesh.v K.Levoch.in 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.Mitth.msiri T.Montaruli y.C.Nan B.y.Pang P.Pattarakij.anich.z.y.Pei M.y.qi D.Ruffolo V.Rulev A.Sáiz L.Sh.o O.Sh.h.golev 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.zh. X.X.zh.i B.B.zh.ng h.M.zh.ng h.y.zh.ng j.L.zh.ng j.W.zh.ng L.zh.ng L.X.zh.ng P.F.zh.ng P.P.zh.ng R.zh.ng S.R.zh.ng S.S.zh.ng X.zh.ng X.P.zh.ng y.zh.ng y.F.zh.ng y.L.zh.ng B.zh.o j.zh.o L.zh.o L.z.zh.o S.P.zh.o F.zh.ng y.zh.ng B.zh.u h.zh.u j.N.zh.u P.zh.u R.zh.u X.X.zh.u C.G.zh. F.R.zh. h.zh. K.j.zh. X.zuo Key Laboratory of Particle Astroph.ics&Experimental Ph.sics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of Ch.nese Academy of Sciences 100049 BeijingChina TIANFU Cosmic Ray Research.Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics China University of Science and Tech.ology of Ch.na 230026 HefeiAnhuiChina Department of Engineering Ph.sics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina Sch.ol of Ph.sics Peking University100871 BeijingChina Center for Astroph.sics Guangzhou University510006 GuangzhouGuangdongChina Sch.ol of Ph.sics and Astronomy&Sch.ol of Ph.sics(Guangzh.u) Sun Yat-sen University519000 ZhuhaiGuangdongChina Sch.ol of Ph.sical Science and Tech.ology Guangxi University530004 NanningGuangxiChina h.bei Normal University 050024 ShijiazhuangHebeiChina Sch.ol of Ph.sics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina Sch.ol 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&Sch.ol of Ph.sics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Information Science and Tech.ology Southwest Jiaotong University610031 ChengduSichuanChina College of Ph.sics Sichuan University610065 ChengduSichuanChina Key Laboratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina Sch.ol of Ph.sics and Tec

A sub-array of th. Large h.gh.Altitude Air Sh.wer Observatory(Lh.ASO),KM2A is mainly designed to observe a large fraction of th. north.rn sky to h.nt for γ-ray sources at energies above 10 *** th.ugh.th. detector construction is still underway,h.lf of th. KM2A array h.s been operating stably since th. end of *** th.s paper,we present th. KM2A data analysis pipeline and th. first observation of th. Crab Nebula,a standard candle in very h.gh.energy γ-ray *** detect γ-ray signals from th. Crab Nebula in both.energy ranges of 10-100 TeV and>100 TeV with.h.gh.significance,by analyzing th. KM2A data of 136 live days between December 2019 and May *** th. observations,we test th. detector performance,including angular resolution,pointing accuracy and cosmic-ray background rej.ction *** energy spectrum of th. Crab Nebula in th. 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 oth.r *** opens a new window of γ-ray astronomy above 0.1 PeV th.ough.wh.ch.new ultrah.gh.energy γ-ray ph.nomena,such.as cosmic PeVatrons,migh. be discovered.

关键词： γ-ray Crab Nebula extensive air sh.wers cosmic rays

Reconstruction of Ch.renkov image bymultiple telescopes of Lh.ASO-WFCTA

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Radiation Detection Tech.ology and Meth.ds 2022年第4期6卷 544-557页

作者： F.Ah.ronian q.An Axikegu L.X.Bai y.X.Bai y.W.Bao D.Bastieri X.j.Bi y.j.Bi j.T.Cai zh. Cao zh.n Cao j.Ch.ng j.F.Ch.ng E.S.Ch.n Liang Ch.n Liang Ch.n Long Ch.n M.j.Ch.n M.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n y.Ch.n h.L.Ch.ng N.Ch.ng y.D.Ch.ng S.W.Cui X.h.Cui y.D.Cui B.D’Ettorre Piazzoli B.z.Dai h.L.Dai z.G.Dai Danzengluobu Ddella Volpe K.K.Duan j.h.Fan y.z.Fan z.X.Fan j.Fang K.Fang C.F.Feng L.Feng S.h.Feng X.T.Feng y.L.Feng B.Gao C.D.Gao L.q.Gao q.Gao W.Gao W.K.Gao M.M.Ge L.S.Geng G.h.Gong q.B.Gou M.h.Gu F.L.Guo j.G.Guo X.L.Guo y.q.Guo y.y.Guo y.A.h.n h.h.h. h.N.h. S.L.h. X.B.h. y.h. M.h.ller y.K.h.r C.h.u X.h.u h.B.h. q.h. S.h. S.C.h. X.j.h. D.h.h.ang W.h.h.ang X.T.h.ang X.y.h.ang y.h.ang z.C.h.ang X.L.j. h.y.j.a K.j.a K.j.ang z.j.j.ang M.j.n M.M.Kang T.Ke D.Kulesh.v K.Levoch.in B.B.Li Ch.ng Li Cong Li F.Li h.B.Li h.C.Li h.y.Li j.Li j.an Li j.e Li K.Li WLLi XRLi Xin Li Xin Li yzLi zh. Li zh.o Li E.W.Liang y.F.Liang S.j.Lin B.Liu C.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.S.Liu j.y.Liu M.y.Liu R.y.Liu S.M.Liu W.Liu y.Liu y.N.Liu W.j.Long R.Lu q.Luo h.K.Lv B.q.Ma L.L.Ma X.h.Ma j.R.Mao A.Masood z.Min W.Mitth.msiri y.C.Nan z.W.Ou B.y.Pang P.Pattarakij.anich.z.y.Pei M.y.qi y.q.qi B.q.qiao j.j.qin D.Ruffolo A.Sáiz C.y.Sh.o L.Sh.o O.Sh.h.golev X.D.sheng j.y.shi h.C.Song yu.V.Stenkin V.Stepanov y.Su q.N.Sun X.N.Sun z.B.Sun P.h.T.Tam z.B.Tang W.W.Tian B.D.Wang C.Wang h.Wang h.G.Wang j.C.Wang j.S.Wang L.P.Wang L.y.Wang R.Wang R.N.Wang W.Wang X.G.Wang X.y.Wang y.Wang y.D.Wang y.j.Wang y.P.Wang z.h.Wang z.X.Wang zh.n Wang zh.ng Wang D.M.Wei j.j.Wei y.j.Wei T.Wen C.y.Wu h.R.Wu S.Wu X.F.Wu y.S.Wu S.q.Xi j.Xia j.j.Xia G.M.Xiang D.X.Xiao G.Xiao G.G.Xin y.L.Xin y.Xing z.Xiong D.L.Xu R.X.Xu L.Xue D.h.yan j.z.yan C.W.yang F.F.yang h.W.yang j.y.yang L.L.yang M.j.yang R.z.yang S.B.yang y.h.yao z.G.yao y.M.ye L.q.yin N.yin X.h.you z.y.you y.h.yu q.yuan h.yue h.D.zeng T.X.zeng W.zeng z.K.zeng M.zh. X.X.zh.i B.B.zh.ng F.zh.ng h.M.zh.ng h.y.zh.ng j.L.zh.ng L.X.zh.ng Li zh.ng Lu zh.ng P.F.zh.ng P.P.zh.ng R.zh.ng S.B.zh.ng S.R.zh.ng S. Key Laboratory of Particle Astroph.ics&Experimental Ph.sics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research.Center ChengduSichuanChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2DublinIreland Max-Planck-Institut for Nuclear Ph.sics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics BeijingChina University of Science and Tech.ology of Ch.na Hefei 230026AnhuiChina Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Information Science and Tech.ology Southwest Jiaotong UniversityChengdu 610031SichuanChina College of Ph.sics Sichuan UniversityChengdu 610065SichuanChina Sch.ol of Astronomy and Space Science Nanjing UniversityNanjing 210023JiangsuChina Center for Astroph.sics Guangzhou UniversityGuangzhou 510006GuangdongChina Key Laboratory of Dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Key Laboratory for Research.in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China h.bei Normal University Shijiazhuang 050024HebeiChina Sch.ol of Ph.sics and Astronomy(zh.h.i)&Sino-French.Institute of Nuclear Engineering and Tech.ology(zh.h.i) Sun Yat-sen UniversityZhuhai 519000China Sch.ol of Ph.sics(Guangzh.u) Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Dipartimento di Fisica dell’Universitàdi Napoli“Federico II” Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly Sch.ol of Ph.sics and Astronomy Yunnan UniversityKunming 650091YunnanChina Département de Ph.sique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève

Introduction One of main scientiﬁc goals of th. Large h.gh.Altitude Air Sh.wer Observatory(Lh.ASO)is to accurately measure th. energy spectra of different cosmic ray compositions around th.‘knee’*** Wide Field-of-View(FoV)Ch.renkov Telescope Array(WFCTA),wh.ch.is one of th. main detectors of Lh.ASO and h.s 18 telescopes,is built to ach.eve th.s *** telescopes are put togeth.r and point to connected directions for a larger *** Telescopes are deployed spatially as close as possible,but due to th.ir own size,th. distance between two adj.cent telescopes is about 10 ***,th. Ch.renkov lateral distribution and th. parallax between th. two telescopes sh.uld be considered in th. event building process for images crossing over th. boundaries of FoVs of th. *** event building meth.d for Ch.renkov images measured by multiple telescopes of WFCTA is *** performance of th. sh.wer measurements using th. combined images is evaluated by comparing with.sh.wers th.t are fully contained by a virtual telescope in *** and conclusion It is proved th.t th. developed event building process can h.lp to increase th. FoV of WFCTA by 30%wh.le maintaining th. same reconstruction quality,compared to th. separate telescope reconstruction meth.d.

关键词： meth.d directions conclusion

Line-of-sh.wer trigger meth.d to lower energy th.esh.ld for GRB detection using Lh.ASO-WCDA

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Radiation Detection Tech.ology and Meth.ds 2021年第4期5卷 531-541页

作者： F.Ah.ronian 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.Ch.ng j.F.Ch.ng X.C.Ch.n B.M.Ch.n j.Ch.n L.Ch.n L.Ch.n L.Ch.n M.j.Ch.n M.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n X.L.Ch.n y.Ch.n N.Ch.n y.D.Ch.n 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.Don j.h.Fan y.z.Fan z.X.Fan j.Fang K.Fan C.F.Feng L.Feng S.h.Fen y.L.Feng B.Gao C.D.Gao q.Gao W.Gao M.M.Ge L.S.Gen G.h.Gong q.B.Gou M.h.Gu j.G.Guo X.L.Guo y.q.Guo y.y.Guo y.A.h.n h.h.h. h.N.h. j.C.h. S.L.h. X.B.h. y.h. M.h.ller y.K.h.r C.h.u X.h.u h.B.h. S.h. S.C.h. X.j.h. D.h.h.ang q.L.h.an W.h.h.ang X.T.h.ang z.C.h.ang F.j. X.L.j. h.y.j.a K.j.ang z.j.j.ang C.j.n D.Kulesh.v K.Levoch.in 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.Mitth.msiri T.Montaruli y.C.Nan B.y.Pang P.Pattarakij.anich.z.y.Pei M.y.qi D.Ruffolo V.Rulev A.Sáiz L.Sh.o O.Sh.h.golev X.D.shen 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.Wan C.Wang h.Wang h.G.Wang j.C.Wang j.S.Wang L.P.Wang L.y.Wan R.N.Wang W.Wang W.Wang X.G.Wang X.j.Wan X.y.Wang y.D.Wan y.j.Wan 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.yan 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.zh. X.X.zh.i B.B.zh.ng h.M.zh.ng h.y.zh.ng j.L.zh.ng j.W.zh.ng L.zh.ng L.zh.ng L.X.zh.ng P.F.zh.ng P.P.zh.ng R.zh.ng S.R.zh.ng S.S.zh.n X.zh.ng X.P.zh.n y.zh.n y.zh.ng y.F.zh.ng y.L.zh.n B.zh.o j.zh.o L.zh.o L.z.zh.o S.P.zh.o F.zh.ng y.zh.ng B.zh.u h.zh.u j.N.zh.u P.zh.u R.zh.u X.X.zh.u C.G. Key Laboratory of Particle Astroph.sics&Experimental Ph.sics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research.Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics BeijingChina University of Science and Tech.ology of Ch.na Hefei 230026AnhuiChina Department of Engineering Ph.sics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China Sch.ol of Ph.sics Peking UniversityBeijing 100871China Center for Astroph.sics Guangzhou UniversityGuangzhou 510006GuangdongChina Sch.ol of Ph.sics and Astronomy&Sch.ol of Ph.sics(Guangzh.u) Sun Yat-sen UniversityZhuhai 519000GuangdongChina Sch.ol of Ph.sical Science and Tech.ology Guangxi UniversityNanning 530004GuangxiChina h.bei Normal University Shijiazhuang 050024HebeiChina Sch.ol of Ph.sics and Microelectronics Zhengzhou UniversityZhengzhou 450001HenanChina Sch.ol 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&Sch.ol of Ph.sics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Information Science and Tech.ology Southwest Jiaotong UniversityChengdu 610031SichuanChina College of Ph.sics Sichuan UniversityChengdu 610065SichuanChina Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina Sch.ol of Ph.sic

Purpose Observation of h.gh.energy and very h.gh.emission from Gamma Ray Bursts(GRBs)is crucial to study th. gigantic explosion and th. underline *** a large field-of-view and almost full duty cycle,th. Water Ch.renkov Detector Array(WCDA),a sub-array of th. Large h.gh.Altitude Air Sh.wer Observatory(Lh.ASO),is appropriate to monitor th. very h.gh.energy emission from unpredictable transients such.as *** Neverth.less,th. main issue for an extensive air sh.wer array is th. h.gh.energy th.esh.ld wh.ch.limits th. h.rizon of th. *** address th.s issue a new trigger meth.d is developed in th.s article to lower th. energy th.esh.ld of WCDA for GRB *** Th. proposed meth.d significantly improves th. detection efficiency of WCDA for gamma-rays around th. GRB direction at 10-300 *** sensitivity of th. WCDA for GRB detection with.th. new trigger meth.d is *** ach.eved sensitivity of th. quarter WCDA array above 10 GeV is comparable with.th.t of *** data analysis process and corresponding fluence upper limit for GRB 190719C is presented as an example.

关键词： Lh.ASO WCDA GRB