Properties of Daily Helium Fluxes

作者：M. Aguilar, L. Ali Cavasonza, G. Ambrosi, L. Arruda, N. Attig, F. Barão, L. Barrin, A. Bartoloni, Seth Pree, R. Battiston, M. Behlmann, J. Berdugo, B. Bertucci, V. Bindi, K. Bollweg, B. Borgia, M. Boschini, M. Bourquin, E. F. Bueno, Johanna Bürger, W. J. Burger, S. Burmeister, X.D. Cai, M. Capell, J. Casaus, G. Castellini, F. Cervelli, Y. H. Chang, G. M. Chen, G. R. Chen, Hanze Chen, Y. Chen, Lin Cheng, H. Y. Chou, S. Chouridou, V. Choutko, C. H. Chung, C. Clark, G. Coignet, C. Consolandi, A. Contin, C. Corti, Z. Cui, S. Kokou Dadzie, Amala Dass, C. Delgado, S. Della Torre, B. Demirköz, L. Derome, S. Di Falco, V. Di Felice, C. Díaz, F. Dimiccoli, P. von Doetinchem, Fei Dong, F. Donnini, M. Duranti, A. I. Egorov, A. Eline, J. H. Feng, E. Fiandrini, P.H. Fisher, V. Formato, C. Freeman, C. Gámez, R. J. Garcı́a López, Corrado Gargiulo, H. Gast, M. Gervasi, F. Giovacchini, D. M. Gómez-Coral, J. Gong, C. Goy, Varlen Grabski, D. Grandi, M. Graziani, S. Haino, K. C. Han, R. K. Hashmani, Z. H. He, B. Heber, Timothy H. Hsieh, Jiayu Hu, M. Incagli, W. Jang, Yi Jia, H. Jinchi, G. Karagöz, B. Khiali, G. N. Kim, Th. Kirn, M. Konyushikhin, O. Kounina, A. Kounine, V. Koutsenko, D. Krasnopevtsev, A. Kuhlman, A. Kulemzin, G. La Vacca, E. Laudi, G. Laurenti, I. Lazzizzera, H. T. Lee, S. C. Lee, H. L. Li, Qiang Li, M. Li, Q. Li, Q. Y. Li, S. Li, Shiliang Li, J. H. Li, Z. H. Li, Juncheng Liang, M. J. Liang, Christopher Light, Chao‐Hung Lin, Thomas Lippert, Haibo Liu, S. Q. Lu, Y.S. Lu, K. Luebelsmeyer, J. Luo, Xi Luo, F. Machate, C. Mañá, J. Marín, J. Marquardt, T. Martin, G. Martı́nez, N. Masi, D. Maurin, T. Medvedeva, A. Menchaca-Rocha, Q. Meng, V. V. Mikhailov, M. Molero, P. Mott, L. Mussolin, J. Negrete, N. Nikonov, F. Nozzoli, J. Ocampo-Peleteiro, A. Oliva, M. Orcinha, M. Palermo, F. Palmonari, M. Paniccia, A. Pashnin, M. Pauluzzi, S. Pensotti, V. Plyaskin, M. Pohl, Stepan Poluianov, X. Qin, Z. Y. Qu, L. Quadrani, P.G. Rancoita, D. Rapin, A. Reina Conde, E. Robyn, S. Rosier-Lees, A. Rozhkov, D. Rozza, R. Z. Sagdeev, S. Schael, A. Schultz von Dratzig, G. Schwering, E. S. Seo, B. S. Shan, T. Siedenburg, Jiwei Song, Xiaojian Song, R. Sonnabend, Lidia Strigari, T. Su, Qie Sun, Z. T. Sun, M. Tacconi, X. Tang, Zichao Tang, Jie Tian, Samuel C.C. Ting, S. M. Ting, Nicola Tomassetti, J. Torsti, T. Urban, Ilya Usoskin, V. Vagelli, Rami Vainio, M. Valencia-Otero, E. Valente, E. Valtonen, M. Vázquez Acosta, M. Vecchi, M. Velasco, J. P. Vialle, C. X. Wang, L. Wang, L. Q. Wang, H. Wang, Qiuliang Wang, S. Wang, X. Wang, Yu Wang, Z. M. Wang, Chuncheng Wei, Z. Weng, H. Wu, R. Q. Xiong, W. Xu, Qi Yan, Y. Yang, I. I. Yashin, Han Yi, Yangyi Yu, Z. Q. Yu, M. Zannoni, C. Zhang, F. Zhang, F. Z. Zhang, J. H. Zhang, Z. Zhang, F. Zhao, C. Zheng, Z. M. Zheng, H. L. Zhuang, V. Zhukov, A. Zichichi, P. Zuccon · 发表于：Physical Review Letters · 年份：2022 · DOI：10.1103/physrevlett.128.231102 · 被引用次数：45 · 研究领域：Solar and Space Plasma Dynamics、Astrophysics and Cosmic Phenomena、Dark Matter and Cosmic Phenomena

We present the precision measurement of 2824 daily helium fluxes in cosmic rays from May 20, 2011 to October 29, 2019 in the rigidity interval from 1.71 to 100 GV based on 7.6×10^{8} helium nuclei collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The helium flux and the helium to proton flux ratio exhibit variations on multiple timescales. In nearly all the time intervals from 2014 to 2018, we observed recurrent helium flux variations with a period of 27 days. Shorter periods of 9 days and 13.5 days are observed in 2016. The strength of all three periodicities changes with time and rigidity. In the entire time period, we found that below ∼7 GV the helium flux exhibits larger time variations than the proton flux, and above ∼7 GV the helium to proton flux ratio is time independent. Remarkably, below 2.4 GV a hysteresis between the helium to proton flux ratio and the helium flux was observed at greater than the 7σ level. This shows that at low rigidity the modulation of the helium to proton flux ratio is different before and after the solar maximum in 2014.