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Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station

Title
Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station
Authors
Aguilar M.Aisa D.Alpat B.Alvino A.Ambrosi G.Andeen K.Arruda L.Attig N.Azzarello P.Bachlechner A.Barao F.Barrau A.Barrin L.Bartoloni A.Basara L.Battarbee M.Battiston R.Bazo J.Becker U.Behlmann M.Beischer B.Berdugo J.Bertucci B.Bindi V.Bizzaglia S.Bizzarri M.Boella G.De Boer W.Bollweg K.Bonnivard V.Borgia B.Borsini S.Boschini M.J.Bourquin M.Burger J.Cadoux F.Cai X.D.Capell M.Caroff S.Casaus J.Castellini G.Cernuda I.Cerreta D.Cervelli F.Chae M.J.Chang Y.H.Chen A.I.Chen G.M.Chen H.Chen H.S.Cheng L.Chou H.Y.Choumilov E.Choutko V.Chung C.H.Clark C.Clavero R.Coignet G.Consolandi C.Contin A.Corti C.Gil E.C.Coste B.Creus W.Crispoltoni M.Cui Z.Dai Y.M.Delgado C.Della Torre S.Demirköz M.B.Derome L.Di Falco S.Di Masso L.Dimiccoli F.Díaz C.Von Doetinchem P.Donnini F.Duranti M.D'urso D.Egorov A.Eline A.Eppling F.J.Eronen T.Fan Y.Y.Farnesini L.Feng J.Fiandrini E.Fiasson A.Finch E.Fisher P.Formato V.Galaktionov Y.Gallucci G.García B.García-López R.Gargiulo C.Gast H.Gebauer I.Gervasi M.Ghelfi A.Giovacchini F.Goglov P.Gong J.Goy C.Grabski V.Grandi D.Graziani M.Guandalini C.Guerri I.Guo K.H.Haas D.Habiby M.Haino S.Han K.C.He Z.H.Heil M.Hoffman J.Hsieh T.H.Huang Z.C.Huh C.Incagli M.Ionica M.Jang W.Y.Jinchi H.Kanishev K.Kim G.N.Kim K.S.Kirn T.Korkmaz M.A.Kossakowski R.Kounina O.Kounine A.Koutsenko V.Krafczyk M.S.La Vacca G.Laudi E.Laurenti G.Lazzizzera I.Lebedev A.Lee H.T.Lee S.C.Leluc C.Li H.L.Li J.Q.Li Q.Li T.X.Li W.Li Y.Li Z.H.Li Z.Y.Lim S.Lin C.H.Lipari P.Lippert T.Liu D.Liu H.Lolli M.Lomtadze T.Lu M.J.Lu S.Q.Lu Y.S.Luebelsmeyer K.Luo F.Luo J.Z.Lv S.S.Majka R.Mañá C.Marín J.Martin T.Martínez G.Masi N.Maurin D.Menchaca-Rocha A.Meng Q.Mo D.C.Morescalchi L.Mott P.Müller M.Nelson T.Ni J.Q.Nikonov N.Nozzoli F.Nunes P.Obermeier A.Oliva A.Orcinha M.Palmonari F.Palomares C.Paniccia M.Papi A.Pauluzzi M.Pedreschi E.Pensotti S.Pereira R.Picot-Clemente N.Pilo F.Piluso A.Pizzolotto C.Plyaskin V.Pohl M.Poireau V.Putze A.Quadrani L.Qi X.M.Qin X.Qu Z.Y.Räihä T.Rancoita P.G.Rapin D.Ricol J.S.Rodríguez I.Rosier-Lees S.Rozhkov A.Rozza D.Sagdeev R.Sandweiss J.Saouter P.Schael S.Schmidt S.M.Von Dratzig A.S.Schwering G.Scolieri G.Seo E.S.Shan B.S.Shan Y.H.Shi J.Y.Shi X.Y.Shi Y.M.Siedenburg T.Son D.Song J.W.Spada F.Spinella F.Sun W.Sun W.H.Tacconi M.Tang C.P.Tang X.W.Tang Z.C.Tao L.Tescaro D.Ting S.C.C.Ting S.M.Tomassetti N.Torsti J.Türkoʇlu C.Urban T.Vagelli V.Valente E.Vannini C.Valtonen E.Vaurynovich S.Vecchi M.Velasco M.Vialle J.P.Vitale V.Vitillo S.Wang L.Q.Wang N.H.Wang Q.L.Wang R.S.Wang X.Wang Z.X.Weng Z.L.Whitman K.Wienkenhöver J.Willenbrock M.Wu H.Wu X.Xia X.Xie M.Xie S.Xiong R.Q.Xu N.S.Xu W.Yan Q.Yang J.Yang M.Yang Y.Ye Q.H.Yi H.Yu Y.J.Yu Z.Q.Zeissler S.Zhang C.Zhang J.H.Zhang M.T.Zhang S.D.Zhang S.W.Zhang X.B.Zhang Z.Zheng Z.M.Zhuang H.L.Zhukov V.Zichichi A.Zimmermann N.Zuccon P.
Ewha Authors
양종만
SCOPUS Author ID
양종만scopus
Issue Date
2015
Journal Title
Physical Review Letters
ISSN
0031-9007JCR Link
Citation
vol. 115, no. 21
Publisher
American Physical Society
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. The detailed variation with rigidity of the helium flux spectral index is presented for the first time. The spectral index progressively hardens at rigidities larger than 100 GV. The rigidity dependence of the helium flux spectral index is similar to that of the proton spectral index though the magnitudes are different. Remarkably, the spectral index of the proton to helium flux ratio increases with rigidity up to 45 GV and then becomes constant; the flux ratio above 45 GV is well described by a single power law. © 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
DOI
10.1103/PhysRevLett.115.211101
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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