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. 2018 Aug 3;121(5):051102.
doi: 10.1103/PhysRevLett.121.051102.

Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station

M Aguilar  1 L Ali Cavasonza  2 G Ambrosi  3 L Arruda  4 N Attig  5 S Aupetit  6 P Azzarello  7 A Bachlechner  2 F Barao  4 A Barrau  6 L Barrin  8 A Bartoloni  9 L Basara  10 S Başeğmez-du Pree  11 M Battarbee  12 R Battiston  10   13 U Becker  14 M Behlmann  14 B Beischer  2 J Berdugo  1 B Bertucci  3   15 K F Bindel  16 V Bindi  17 W de Boer  16 K Bollweg  18 V Bonnivard  6 B Borgia  9   19 M J Boschini  20 M Bourquin  7 E F Bueno  21 J Burger  14 F Cadoux  7 X D Cai  14 M Capell  14 S Caroff  22 J Casaus  1 G Castellini  23 F Cervelli  24 M J Chae  25 Y H Chang  26 A I Chen  14 G M Chen  11 H S Chen  11   27 Y Chen  7 L Cheng  28 H Y Chou  26 E Choumilov  14 V Choutko  14 C H Chung  2 C Clark  18 R Clavero  29 G Coignet  22 C Consolandi  17 A Contin  30   31 C Corti  17 W Creus  32 M Crispoltoni  3   15 Z Cui  28 K Dadzie  14 Y M Dai  33 A Datta  17 C Delgado  1 S Della Torre  20 M B Demirköz  34 L Derome  6 S Di Falco  24 F Dimiccoli  10   13 C Díaz  1 P von Doetinchem  17 F Dong  35 F Donnini  3   15 M Duranti  3 D D'Urso  3 A Egorov  14 A Eline  14 T Eronen  12 J Feng  14 E Fiandrini  3   15 P Fisher  14 V Formato  3 Y Galaktionov  14 G Gallucci  24 R J García-López  29 C Gargiulo  8 H Gast  2 I Gebauer  16 M Gervasi  20   36 A Ghelfi  6 F Giovacchini  1 D M Gómez-Coral  37 J Gong  35 C Goy  22 V Grabski  37 D Grandi  20 M Graziani  16 K H Guo  38 S Haino  32 K C Han  39 Z H He  38 M Heil  14 T H Hsieh  14 H Huang  32 Z C Huang  38 C Huh  40 M Incagli  24 M Ionica  3 W Y Jang  40 Yi Jia  14 H Jinchi  39 S C Kang  40 K Kanishev  8   10 B Khiali  26 G N Kim  40 K S Kim  40 Th Kirn  2 C Konak  34 O Kounina  14 A Kounine  14 V Koutsenko  14 A Kulemzin  14 G La Vacca  20   36 E Laudi  8 G Laurenti  30 I Lazzizzera  10   13 A Lebedev  14 H T Lee  41 S C Lee  32 C Leluc  7 H S Li  42 J Q Li  35 Q Li  35 T X Li  38 Z H Li  11 Z Y Li  32 S Lim  40 C H Lin  32 P Lipari  9 T Lippert  5 D Liu  26 Hu Liu  14 V D Lordello  21 S Q Lu  32 Y S Lu  11 K Luebelsmeyer  2 F Luo  28 J Z Luo  35 S S Lyu  38 F Machate  2 C Mañá  1 J Marín  1 T Martin  18 G Martínez  1 N Masi  30 D Maurin  6 A Menchaca-Rocha  37 Q Meng  35 V M Mikuni  21 D C Mo  38 P Mott  18 T Nelson  17 J Q Ni  38 N Nikonov  2 F Nozzoli  3   10 A Oliva  1 M Orcinha  4 M Palermo  17 F Palmonari  30   31 C Palomares  1 M Paniccia  7 M Pauluzzi  3   15 S Pensotti  20   36 C Perrina  7 H D Phan  14 N Picot-Clemente  43 F Pilo  24 C Pizzolotto  3 V Plyaskin  14 M Pohl  7 V Poireau  22 L Quadrani  30   31 X M Qi  38 X Qin  14 Z Y Qu  32 T Räihä  2 P G Rancoita  20 D Rapin  7 J S Ricol  6 S Rosier-Lees  22 A Rozhkov  14 D Rozza  20   36 R Sagdeev  44 S Schael  2 S M Schmidt  5 A Schulz von Dratzig  2 G Schwering  2 E S Seo  43 B S Shan  45 J Y Shi  35 T Siedenburg  2 D Son  40 J W Song  28 M Tacconi  20   36 X W Tang  11 Z C Tang  11 D Tescaro  29 Samuel C C Ting  14   8 S M Ting  14 N Tomassetti  3   15 J Torsti  12 C Türkoğlu  34 T Urban  18 V Vagelli  3   15 E Valente  9   19 E Valtonen  12 M Vázquez Acosta  29 M Vecchi  21 M Velasco  1 J P Vialle  22 L Q Wang  28 N H Wang  28 Q L Wang  33 X Wang  14 X Q Wang  11   27 Z X Wang  38 C C Wei  32 Z L Weng  14 K Whitman  17 H Wu  35 X Wu  7 R Q Xiong  35 W Xu  14 Q Yan  14 J Yang  25 M Yang  11 Y Yang  42 H Yi  35 Y J Yu  33 Z Q Yu  11 M Zannoni  20   36 S Zeissler  16 C Zhang  11 F Zhang  11 J Zhang  14 J H Zhang  35 S W Zhang  11   27 Z Zhang  14 Z M Zheng  45 H L Zhuang  11 V Zhukov  2 A Zichichi  30   31 N Zimmermann  2 P Zuccon  14 AMS Collaboration
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Free article

Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station

M Aguilar et al. Phys Rev Lett. .
Free article

Abstract

We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×10^{6} events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e^{+}/e^{-} flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.

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