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CERN Accelerating science

Article
Title Properties of Daily Helium Fluxes
Author(s)

Aguilar, M (Madrid, CIEMAT) ; Cavasonza, L Ali (RWTH Aachen U.) ; Ambrosi, G (INFN, Perugia ; Perugia U.) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich) ; Barao, F (LIP, Lisbon) ; Barrin, L (CERN) ; Bartoloni, A (INFN, Rome) ; Başeğmez-du Pree, S (Kapteyn Astron. Inst., Groningen) ; Battiston, R (INFN, Trento ; Trento U. ; TIFPA-INFN, Trento) ; Behlmann, M (MIT) ; Berdugo, J (Madrid, CIEMAT) ; Bertucci, B (INFN, Perugia ; Perugia U.) ; Bindi, V (Hawaii U.) ; Bollweg, K (NASA, Houston) ; Borgia, B (INFN, Rome ; Rome U., La Sapienza, Dip. di Matematica) ; Boschini, M J (Milan Bicocca U.) ; Bourquin, M (Geneva U.) ; Bueno, E F (Kapteyn Astron. Inst., Groningen) ; Burger, J (MIT) ; Burger, W J (INFN, Trento ; Trento U.) ; Burmeister, S (Kiel U.) ; Cai, X D (MIT) ; Capell, M (MIT) ; Casaus, J (Madrid, CIEMAT) ; Castellini, G (INFN, Bologna) ; Cervelli, F (Pisa U. ; INFN, Pisa) ; Chang, Y H (Taiwan, Inst. Phys.) ; Chen, G M (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Chen, G R (Shandong U.) ; Chen, H S (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Chen, Y (Geneva U. ; Shandong U.) ; Cheng, L (Shandong U.) ; Chou, H Y (Taiwan, Inst. Phys.) ; Chouridou, S (RWTH Aachen U.) ; Choutko, V (MIT) ; Chung, C H (RWTH Aachen U.) ; Clark, C (NASA, Houston ; MIT) ; Coignet, G (Annecy, LAPP) ; Consolandi, C (Hawaii U.) ; Contin, A (INFN, Bologna) ; Corti, C (Hawaii U.) ; Cui, Z (Shandong U.) ; Dadzie, K (MIT) ; Dass, A (INFN, Trento ; Trento U. ; TIFPA-INFN, Trento) ; Delgado, C (Madrid, CIEMAT) ; Della Torre, S (Milan Bicocca U.) ; Demirköz, M B (Middle East Tech. U., Ankara) ; Derome, L (LPSC, Grenoble) ; Di Falco, S (Pisa U. ; INFN, Pisa) ; Di Felice, V (INFN, Rome2 ; Rome U., Tor Vergata) ; Díaz, C (Madrid, CIEMAT) ; Dimiccoli, F (INFN, Trento ; Trento U.) ; von Doetinchem, P (Hawaii U.) ; Dong, F (Southeast U., Nanjing) ; Donnini, F (INFN, Rome2 ; Rome U., Tor Vergata) ; Duranti, M (INFN, Perugia ; Perugia U.) ; Egorov, A (MIT) ; Eline, A (MIT) ; Feng, J (MIT) ; Fiandrini, E (INFN, Perugia ; Perugia U.) ; Fisher, P (MIT) ; Formato, V (INFN, Rome2 ; Rome U., Tor Vergata) ; Freeman, C (Hawaii U.) ; Gámez, C (Madrid, CIEMAT) ; García-López, R J (IAC, La Laguna) ; Gargiulo, C (CERN) ; Gast, H (RWTH Aachen U.) ; Gervasi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Giovacchini, F (Madrid, CIEMAT) ; Gómez-Coral, D M (Hawaii U.) ; Gong, J (Southeast U., Nanjing) ; Goy, C (Annecy, LAPP) ; Grabski, V (Mexico U.) ; Grandi, D (INFN, Milan Bicocca ; Milan Bicocca U.) ; Graziani, M (INFN, Perugia ; Perugia U.) ; Haino, S (Taiwan, Inst. Phys.) ; Han, K C (Taiwan, Natl. Central U.) ; Hashmani, R K (Middle East Tech. U., Ankara) ; He, Z H (SYSU, Guangzhou) ; Heber, B (Kiel U.) ; Hsieh, T H (MIT) ; Hu, J Y (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Incagli, M (Pisa U. ; INFN, Pisa) ; Jang, W Y (Kyungpook Natl. U.) ; Jia, Yi (MIT) ; Jinchi, H (Taiwan, Natl. Central U.) ; Karagöz, G (Middle East Tech. U., Ankara) ; Khiali, B (INFN, Rome2 ; Rome U., Tor Vergata) ; Kim, G N (Kyungpook Natl. U.) ; Kirn, Th (RWTH Aachen U.) ; Konyushikhin, M (MIT) ; Kounina, O (MIT) ; Kounine, A (MIT) ; Koutsenko, V (MIT) ; Krasnopevtsev, D (MIT) ; Kuhlman, A (Hawaii U.) ; Kulemzin, A (MIT) ; La Vacca, G (INFN, Milan Bicocca ; Milan Bicocca U.) ; Laudi, E (CERN) ; Laurenti, G (INFN, Bologna) ; Lazzizzera, I (INFN, Trento ; Trento U. ; TIFPA-INFN, Trento) ; Lee, H T (Taiwan, Inst. Phys.) ; Lee, S C (Taiwan, Inst. Phys.) ; Li, H L (Shandong U.) ; Li, J Q (Southeast U., Nanjing) ; Li, M (RWTH Aachen U.) ; Li, Q (Southeast U., Nanjing) ; Li, Q Y (Shandong U.) ; Li, S (RWTH Aachen U.) ; Li, S L (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Li, J H (Shandong U.) ; Li, Z H (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Liang, J (Shandong U.) ; Liang, M J (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Light, C (Hawaii U.) ; Lin, C H (Taiwan, Inst. Phys.) ; Lippert, T (IAS, Julich) ; Liu, J H (Beijing, Inst. Mechanics) ; Lu, S Q (Taiwan, Inst. Phys.) ; Lu, Y S (Beijing, Inst. High Energy Phys.) ; Luebelsmeyer, K (RWTH Aachen U.) ; Luo, J Z (Southeast U., Nanjing) ; Luo, Xi (Shandong U.) ; Machate, F (RWTH Aachen U.) ; Mañá, C (Madrid, CIEMAT) ; Marín, J (Madrid, CIEMAT) ; Marquardt, J (Kiel U.) ; Martin, T (NASA, Houston ; MIT) ; Martínez, G (Madrid, CIEMAT) ; Masi, N (INFN, Bologna) ; Maurin, D (LPSC, Grenoble) ; Medvedeva, T (MIT) ; Menchaca-Rocha, A (Mexico U.) ; Meng, Q (Southeast U., Nanjing) ; Mikhailov, V V (Moscow Phys. Eng. Inst.) ; Molero, M (Madrid, CIEMAT) ; Mott, P (NASA, Houston ; MIT) ; Mussolin, L (INFN, Perugia ; Perugia U.) ; Negrete, J (Hawaii U.) ; Nikonov, N (RWTH Aachen U.) ; Nozzoli, F (INFN, Trento ; Trento U.) ; Ocampo-Peleteiro, J (Madrid, CIEMAT) ; Oliva, A (INFN, Bologna) ; Orcinha, M (LIP, Lisbon) ; Palermo, M (Hawaii U.) ; Palmonari, F (INFN, Bologna) ; Paniccia, M (Geneva U.) ; Pashnin, A (MIT) ; Pauluzzi, M (INFN, Perugia ; Perugia U.) ; Pensotti, S (INFN, Milan Bicocca ; Milan Bicocca U.) ; Plyaskin, V (MIT) ; Pohl, M (Geneva U.) ; Poluianov, S (Oulu U.) ; Qin, X (MIT) ; Qu, Z Y (Taiwan, Inst. Phys. ; Shandong U.) ; Quadrani, L (INFN, Bologna) ; Rancoita, P G (Milan Bicocca U.) ; Rapin, D (Geneva U.) ; Conde, A Reina (INFN, Bologna ; IAC, La Laguna) ; Robyn, E (Geneva U.) ; Rosier-Lees, S (Annecy, LAPP) ; Rozhkov, A (MIT) ; Rozza, D (INFN, Milan Bicocca ; Milan Bicocca U.) ; Sagdeev, R (Maryland U.) ; Schael, S (RWTH Aachen U.) ; von Dratzig, A Schultz (RWTH Aachen U.) ; Schwering, G (RWTH Aachen U.) ; Seo, E S (Maryland U.) ; Shan, B S (BeiHang U.) ; Siedenburg, T (RWTH Aachen U.) ; Song, J W (Shandong U.) ; Song, X J (Shandong U.) ; Sonnabend, R (RWTH Aachen U.) ; Strigari, L (INFN, Rome) ; Su, T (Shandong U.) ; Sun, Q (Shandong U.) ; Sun, Z T (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Tacconi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Tang, X W (Beijing, Inst. High Energy Phys.) ; Tang, Z C (Beijing, Inst. High Energy Phys.) ; Tian, J (INFN, Perugia ; Perugia U.) ; Ting, Samuel C C (CERN ; MIT) ; Ting, S M (MIT) ; Tomassetti, N (INFN, Perugia ; Perugia U.) ; Torsti, J (Turku U.) ; Urban, T (NASA, Houston ; MIT) ; Usoskin, I (Oulu U.) ; Vagelli, V (INFN, Perugia ; Perugia U. ; ASI, Rome) ; Vainio, R (Turku U.) ; Valencia-Otero, M (Taiwan, Natl. Central U.) ; Valente, E (INFN, Rome ; Rome U., La Sapienza, Dip. di Matematica) ; Valtonen, E (Turku U.) ; Vázquez Acosta, M (IAC, La Laguna) ; Vecchi, M (Kapteyn Astron. Inst., Groningen) ; Velasco, M (Madrid, CIEMAT) ; Vialle, J P (Annecy, LAPP) ; Wang, C X (Shandong U.) ; Wang, L (Beijing, Inst. Mechanics) ; Wang, L Q (Shandong U.) ; Wang, N H (Shandong U.) ; Wang, Q L (Beijing, Inst. Mechanics) ; Wang, S (Hawaii U.) ; Wang, X (MIT) ; Wang, Yu (Shandong U.) ; Wang, Z M (Shandong U.) ; Wei, J (Geneva U. ; Shandong U.) ; Weng, Z L (MIT) ; Wu, H (Southeast U., Nanjing) ; Xiong, R Q (Southeast U., Nanjing) ; Xu, W (Shandong U.) ; Yan, Q (MIT) ; Yang, Y (Taiwan, Natl. Cheng Kung U.) ; Yashin, I I (Moscow Phys. Eng. Inst.) ; Yi, H (Southeast U., Nanjing) ; Yu, Y M (MIT) ; Yu, Z Q (Beijing, Inst. High Energy Phys.) ; Zannoni, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Zhang, C (Beijing, Inst. High Energy Phys.) ; Zhang, F (Beijing, Inst. High Energy Phys.) ; Zhang, F Z (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Zhang, J H (Southeast U., Nanjing) ; Zhang, Z (MIT) ; Zhao, F (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.) ; Zheng, C (Shandong U.) ; Zheng, Z M (BeiHang U.) ; Zhuang, H L (Beijing, Inst. High Energy Phys.) ; Zhukov, V (RWTH Aachen U.) ; Zichichi, A (INFN, Bologna) ; Zuccon, P (INFN, Trento ; Trento U. ; TIFPA-INFN, Trento)

Publication 2022
Number of pages 10
In: Phys. Rev. Lett. 128 (2022) 231102
DOI 10.1103/PhysRevLett.128.231102 (publication)
Subject category Astrophysics and Astronomy
Accelerator/Facility, Experiment AMS
Abstract 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 7.6×108 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.
Copyright/License publication: © 2022-2024 authors (License: CC-BY-4.0)

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 Записът е създаден на 2022-06-17, последна промяна на 2023-03-28


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