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

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.; Bourquin, M.; Burger, J.; Cadoux, F.; Cai, X.; Capell, M.; Caroff, S.; Casaus, J.; Castellini, G.; Cernuda, I.; Cerreta, D.; Cervelli, F.; Chae, M.; Chang, Y.; Chen, A.; Chen, G.; Chen, H.; Chen, H.; Cheng, L.; Chou, H.; Choumilov, E.; Choutko, V.; Chung, C.; Clark, C.; Clavero, R.; Coignet, G.; Consolandi, C.; Contin, A.; Corti, C.; Gil, E.; Coste, B.; Creus, W.; Crispoltoni, M.; Cui, Z.; Dai, Y.; Delgado, C.; Della Torre, S.; DEMİRKÖZ, MELAHAT; Derome, L.; Di Falco, S.; Di Masso, L.; Dimiccoli, F.; Diaz, C.; von Doetinchem, P.; Donnini, F.; Duranti, M.; D'Urso, D.; Egorov, A.; Eline, A.; Eppling, F.; Eronen, T.; Fan, Y.; Farnesini, L.; Feng, J.; Fiandrini, E.; Fiasson, A.; Finch, E.; Fisher, P.; Formato, V.; Galaktionov, Y.; Gallucci, G.; Garcia, B.; Garcia-Lopez, 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.; Haas, D.; Habiby, M.; Haino, S.; Han, K.; He, Z.; Heil, M.; Hsieh, T.; Huang, Z.; Huh, C.; Incagli, M.; Ionica, M.; Jang, W.; Jinchi, H.; Kanishev, K.; Kim, G.; Kim, K.; Kirn, Th.; Korkmaz, M.; Kossakowski, R.; Kounina, O.; Kounine, A.; Koutsenko, V.; Krafczyk, M.; La Vacca, G.; Laudi, E.; Laurenti, G.; Lazzizzera, I.; Lebedev, A.; Lee, H.; Lee, S.; Leluc, C.; Li, H.; Li, J.; Li, J.; Li, Q.; Li, Q.; Li, T.; Li, W.; Li, Y.; Li, Z.; Li, Z.; Lim, S.; Lin, C.; Lipari, P.; Lippert, T.; Liu, D.; Liu, H.; Liu, Hu; Lolli, M.; Lomtadze, T.; Lu, M.; Lu, S.; Lu, Y.; Luebelsmeyer, K.; Luo, F.; Luo, J.; Lv, S.; Majka, R.; Mana, C.; Marin, J.; Martin, T.; Martinez, G.; Masi, N.; Maurin, D.; Menchaca-Rocha, A.; Meng, Q.; Mo, D.; Morescalchi, L.; Mott, P.; Mueller, M.; Nelson, T.; Ni, J.; 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.; Qin, X.; Qu, Z.; Raeihae, T.; Rancoita, P.; Rapin, D.; Ricol, J.; Rodriguez, I.; Rosier-Lees, S.; Rozhkov, A.; Rozza, D.; Sagdeev, R.; Sandweiss, J.; Saouter, P.; Schael, S.; Schmidt, S.; von Dratzig, A.; Schwering, G.; Scolieri, G.; Seo, E.; Shan, B.; Shan, Y.; Shi, J.; Shi, X.; Shi, Y.; Siedenburg, T.; Son, D.; Song, J.; Spada, F.; Spinella, F.; Sun, W.; Sun, W.; Tacconi, M.; Tang, C.; Tang, X.; Tang, Z.; Tao, L.; Tescaro, D.; Ting, Samuel; Ting, S.; Tomassetti, N.; Torsti, J.; Tuerkoglu, C.; Urban, T.; Vagelli, V.; Valente, E.; Vannini, C.; Valtonen, E.; Vaurynovich, S.; Vecchi, M.; Velasco, M.; Vialle, J.; Vitale, V.; Vitillo, S.; Wang, L.; Wang, N.; Wang, Q.; Wang, R.; Wang, X.; Wang, Z.; Weng, Z.; Whitman, K.; Wienkenhoever, J.; Willenbrock, M.; Wu, H.; Wu, X.; Xia, X.; Xie, M.; Xie, S.; Xiong, R.; Xu, N.; Xu, W.; Yan, Q.; Yang, J.; Yang, M.; Yang, Y.; Ye, Q.; Yi, H.; Yu, Y.; Yu, Z.; Zeissler, S.; Zhang, C.; Zhang, J.; Zhang, M.; Zhang, S.; Zhang, S.; Zhang, X.; Zhang, Z.; Zheng, Z.; Zhuang, H.; Zhukov, V.; Zichichi, A.; Zimmermann, N.; Zuccon, P.

doi:10.1103/physrevlett.115.211101

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

Atıf İçin Kopyala

Aguilar M., Aisa D., Alpat B., Alvino A., Ambrosi G., Andeen K., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.115, sa.21, 2015 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 115 Sayı: 21
Basım Tarihi: 2015
Doi Numarası: 10.1103/physrevlett.115.211101
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.