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3. Polarization rotation and the electrocaloric effect in barium titanate

Author

Wu, H. H. and Cohen, R. E.

Subjects
Condensed Matter - Materials Science
Abstract

We study the electrocaloric effect in the classic ferroelectric BaTiO3 through a series of phase transitions driven by applied electric field and temperature. We find both negative and positive electrocaloric effects, with the negative electrocaloric effect, where temperature decreases with applied field, in monoclinic phases. Macroscopic polarization rotation is evident through the monoclinic and orthorhombic phases under applied field, and is responsible for the negative electrocaloric effect.

Published
2017
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4. Electric field induced phase transition and electrocaloric effect in PMN-PT

Author

Wu, H. H. and Cohen, R. E.

Subjects
Condensed Matter - Materials Science
Abstract

Ferroelectric perovskite oxides possess a large electrocaloric (EC) effect, but usually at high temperatures near the ferroelectric/paraelectric phase transition temperature, which limits their potential application as next-generation solid-state cooling devices. We use classical molecular dynamics to study the electric field induced phase transitions and EC effect in PMN-PT (PbMg1/3Nb2/3O3-PbTiO3). We find that the maximum EC strength of PMN-PT occurs within the morphotropic phase boundary (MPB) region at 300 K. The large adiabatic temperature change is caused by easy rotation of polarization within the MPB region., Comment: 17 pages, 7 figures

Published
2017
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5. Impact of academic collaboration and quality of clinical orthopaedic research conducted in low- and middle-income countries.

Author

Morshed, Saam, Miclau, Theodore, Wu, H-H, Liu, M, Patel, KR, Turner, W, Baltus, L, Caldwell, AM, Hahn, JC, and Coughlin, RR

Abstract

Little is known about the quality of orthopaedic investigations conducted in low- and middle-income countries (LMICs). Academic collaboration is one model to build research capacity and improve research quality. Our study aimed to determine (1) the quality

Published
2017

6. Guide Field Dependence of Energy Conversion and Magnetic Topologies in Reconnection Turbulent Outflow.

Author

Xiong, Q. Y., Huang, S. Y., Zhang, J., Yuan, Z. G., Jiang, K., Wu, H. H., Lin, R. T., Yu, L., and Tang, Y. T.

Subjects
MAGNETIC reconnection, ENERGY conversion, SPACE environment, MAGNETIC structure, MAGNETIC particles
Abstract

Energy conversion between the fields and the particles occurs through various physical processes within space environments. Magnetic reconnection stands out as one such process capable of rapidly and massively releasing energy. The high‐speed outflow jets produced by reconnection can induce turbulence characterized by intermittent structures. In this study, we investigate the impact of guide field on the energy conversion associated with the magnetic topologies within these structures during reconnection. Utilizing both particle‐in‐cell simulations and observations from the Magnetospheric Multiscale mission, our findings suggest that a larger guide field present during reconnection leads to increased energy conversion as well as the generation of O‐type topology structures within the turbulent outflow. Our results provide significant evidence on the relationships between energy conversion and magnetic topologies within turbulent outflow of reconnection and the guide field conditions. Plain Language Summary: In space environments, various physical processes involve the conversion of energy between magnetic fields and particles. One such process is magnetic reconnection, which can rapidly release a large amount of energy. During magnetic reconnection, high‐speed outflow jets are generated, leading to the formation of turbulent structures. In our study, we investigate how the presence of a guide field affects the energy conversion process and the resulting magnetic topologies within these turbulent structures during reconnection events. Using both particle‐in‐cell simulations and observations from the Magnetospheric Multiscale mission, we explore the impact of guide fields on energy conversion and magnetic topologies. Our findings indicate that a larger guide field present during reconnection leads to increased energy conversion and the generation of specific magnetic topology structures known as O‐type topologies within the turbulent outflow. These results provide significant insights into the complex relationships between energy conversion processes, magnetic topologies, and guide field conditions during magnetic reconnection events in space. Understanding these relationships is crucial for advancing our knowledge of fundamental physical processes occurring in space environments. Key Points: Magnetic topology in the turbulent reconnection outflow is investigated through both Magnetospheric Multiscale (MMS) observations and particle‐in‐cell (PIC) simulationsA larger guide field can promote the generation of O‐type topology in the turbulent outflow of the reconnectionHigher energy conversion is contributed by those O‐type topologies in the presence of a larger guide field [ABSTRACT FROM AUTHOR]

Published
2024
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7. Direct Observations of Magnetic Reconnections at the Magnetopause of the Martian Mini‐Magnetosphere.

Author

Lin, R. T., Huang, S. Y., Yuan, Z. G., Jiang, K., Wu, H. H., and Xiong, Q. Y.

Subjects
MAGNETIC reconnection, INTERPLANETARY magnetic fields, SOLAR wind, MAGNETIC field measurements, MAGNETOPAUSE, MAGNETIC anomalies
Abstract

While Mars lacks a global intrinsic magnetic field, it does exhibit crustal magnetic anomalies (mostly in its Southern Hemisphere). These crustal magnetic anomalies directly interact with solar wind, which forms a mini‐magnetosphere and a region denoted the mini‐magnetopause. Using magnetic field and plasma measurements from the Mars Atmosphere and Volatile Evolution, we report a novel case of magnetic reconnection at the Martian mini‐magnetopause. In this process, protons and oxygen ions from the Martian atmosphere were accelerated during reconnection and likely escaped along the outflow direction. Magnetic reconnection may occur between the interplanetary magnetic field and crustal magnetic fields at the Martian mini‐magnetopause, which contributes to planetary ion escape, solar wind entering the mini‐magnetosphere and the evolution of magnetic topology in the dayside Martian mini‐magnetosphere. Plain Language Summary: While Mars lacks a global intrinsic magnetic field, it does exhibit crustal magnetic anomalies. The solar wind from the sun accompanied by interplanetary magnetic field (IMF) directly interacts with this crustal magnetic field, similar to what occurs on Earth, albeit at a smaller scale. The boundary between the crustal field on Mars and the IMF is called the mini‐magnetopause. Magnetic reconnection is a fundamental process in astrophysical and space plasmas that can change the topology of magnetic field and effectively convert magnetic energy into thermal and kinetic energy. Using magnetic field and plasma measurements from the Mars Atmosphere and Volatile Evolution missions, we report direction observations of magnetic reconnection at the Martian mini‐magnetopause. Through magnetic reconnection at the mini‐magnetopause, the IMF reconnects with the magnetic field from the crustal field, forming new magnetic field lines that channel solar wind to enter the Martian atmosphere and planetary plasmas to escape. Key Points: Magnetic reconnection at the Martian mini‐magnetopause is reported for the first timeProton and oxygen ions from the mini‐magnetosphere are accelerated during magnetic reconnectionMagnetic reconnection at the mini‐magnetopause could cause solar wind to enter the mini‐magnetosphere [ABSTRACT FROM AUTHOR]

Published
2024
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9. Electronic superlattice revealed by resonant scattering from random impurities in Sr3Ru2O7

Author

Hossain, M. A., Zegkinoglou, I., Chuang, Y. -D., Geck, J., Bohnenbuck, B., Gonzalez, A. G. Cruz, Wu, H. -H., Schussler-Langeheine, C., Hawthorn, D. G., Denlinger, J. D., Mathieu, R., Tokura, Y., Satow, S., Takagi, H., Yoshida, Y., Hussain, Z., Keimer, B., Sawatzky, G. A., and Damascelli, A.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

Resonant elastic x-ray scattering (REXS) is an exquisite element-sensitive tool for the study of subtle charge, orbital, and spin superlattice orders driven by the valence electrons, which therefore escape detection in conventional x-ray diffraction (XRD). Although the power of REXS has been demonstrated by numerous studies of complex oxides performed in the soft x-ray regime, the cross section and photon wavelength of the material-specific elemental absorption edges ultimately set the limit to the smallest superlattice amplitude and periodicity one can probe. Here we show -- with simulations and REXS on Mn-substituted Sr$_3$Ru$_2$O$_7$ -- that these limitations can be overcome by performing resonant scattering experiments at the absorption edge of a suitably-chosen, dilute impurity. This establishes that -- in analogy with impurity-based methods used in electron-spin-resonance, nuclear-magnetic resonance, and M\"ossbauer spectroscopy -- randomly distributed impurities can serve as a non-invasive, but now momentum-dependent probe, greatly extending the applicability of resonant x-ray scattering techniques.

Published
2013
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10. Magnetic Superstructure and Metal-Insulator Transition in Mn-Substituted Sr3Ru2O7

Author

Hossain, M. A., Bohnenbuck, B., Chuang, Y. -D., Gonzalez, A. G. Cruz, Zegkinoglou, I., Haverkort, M. W., Geck, J., Hawthorn, D. G., Wu, H. -H., Schussler-Langeheine, C., Mathieu, R., Tokura, Y., Satow, S., Takagi, H., Yoshida, Y., Denlinger, J. D., Elfimov, I. S., Hussain, Z., Keimer, B., Sawatzky, G. A., and Damascelli, A.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

We present a temperature-dependent resonant elastic soft x-ray scattering (REXS) study of the metal-insulator transition in Sr3(Ru1-xMnx)2O7, performed at both Ru and Mn L-edges. Resonant magnetic superstructure reflections, which indicate an incipient instability of the parent compound, are detected below the transition. Based on modelling of the REXS intensity from randomly distributed Mn impurities, we establish the inhomogeneous nature of the metal-insulator transition, with an effective percolation threshold corresponding to an anomalously low x<0.05 Mn substitution., Comment: A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/MnSRO_REXS.pdf

Published
2009

11. Simultaneously Interactions of Ultra‐Low‐Frequency Waves and Whistler Waves, and Whistler Waves and Quasi‐Electrostatic Whistler Harmonics in the Earth's Magnetosheath.

Author

Xu, S. B., Huang, S. Y., Yuan, Z. G., Jiang, K., Wu, H. H., Deng, D., Xiong, Q. Y., Lin, R. T., Wang, Z., and Zhang, J.

Subjects
ELECTRICAL harmonics, ELECTRON distribution
Abstract

Identifying how different wave modes interaction with each other is an important topic in space physics. Using measurements from the Magnetospheric Multiscale (MMS) mission, we report an event in the Earth's magnetosheath where ultra‐low‐frequency (ULF) waves, whistler waves, and quasi‐electrostatic whistler harmonics were observed simultaneously. Specifically, our analyses show that the parallel components of ULF waves modulate the electron butterfly distributions which provide the free energy to the excitation of the observed whistler waves. Meanwhile, quasi‐electrostatic waves sharing frequencies that are nearly integral multiples of the frequency of the observed whistlers are identified as nonlinear harmonics of whistler waves. The close correlations between the whistler waves and the electric field harmonics, as well as the high bicoherence indexes within the frequency ranges of the whistlers and harmonics, suggest the significant nonlinear couplings between the whistler waves and quasi‐electrostatic whistler harmonics. Our work provides new insights to the interactions between waves at different frequency bands. Key Points: Ultra‐low‐frequency (ULF) waves, whistler waves, and quasi‐electrostatic whistler harmonics are observed simultaneously in the magnetosheath plasmaULF waves modulate the electron butterfly shaped distributions which provide free energy for the excitation of the observed whistler wavesQuasi‐electrostatic waves are identified as the whistler harmonics, and may be generated by the wave‐wave nonlinear coupling [ABSTRACT FROM AUTHOR]

Published
2024
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13. Magnetic structure of RuSr$_2$GdCu$_2$O$_8$ determined by resonant x-ray diffraction

Author

Bohnenbuck, B., Zegkinoglou, I., Strempfer, J., Nelson, C. S., Wu, H. -H., Schüßler-Langeheine, C., Reehuis, M., Schierle, E., Leininger, Ph., Herrmannsdörfer, T., Lang, J. C., Srajer, G., Lin, C. T., and Keimer, B.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Superconductivity
Abstract

X-ray diffraction with photon energies near the Ru L$_2$-absorption edge was used to detect resonant reflections characteristic of a G-type superstructure in RuSr$_2$GdCu$_2$O$_8$ single crystals. A polarization analysis confirms that these reflections are due to magnetic order of Ru moments, and the azimuthal-angle dependence of the scattering amplitude reveals that the moments lie along a low-symmetry axis with substantial components parallel and perpendicular to the RuO$_2$ layers. Complemented by susceptibility data and a symmetry analysis of the magnetic structure, these results reconcile many of the apparently contradictory findings reported in the literature., Comment: to appear in PRL

Published
2008
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14. Electronic structure of the SrTiO$_3$/LaAlO$_3$ interface revealed by resonant soft x-ray scattering

Author

Wadati, H., Hawthorn, D. G., Geck, J., Higuchi, T., Hikita, Y., Hwang, H. Y., Huang, S. -W., Huang, D. J., Lin, H. -J., Schussler-Langeheine, C., Wu, H. -H., Schierle, E., Weschke, E., and Sawatzky, G. A.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

We investigated the electronic structure of the SrTiO$_3$/LaAlO$_3$ superlattice (SL) by resonant soft x-ray scattering. The (003) peak, which is forbidden for our "ideal" SL structure, was observed at all photon energies, indicating reconstruction at the interface. From the peak position analyses taking into account the effects of refraction, we obtained evidence for electronic reconstruction of Ti 3d and O $2p$ states at the interface. From reflectivity analyses, we concluded that the AlO$_2$/LaO/TiO$_2$/SrO and the TiO$_2$/SrO/AlO$_2$/LaO interfaces are quite different, leading to highly asymmetric properties., Comment: 5 pages, 4 figures

Published
2008
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15. Atomic multiplet calculation of 3d_{5/2} -> 4f resonant x-ray diffraction from Ho metal

Author

Haverkort, M. W., Schüßler-Langeheine, C., Chang, C. F., Buchholz, M., Wu, H. -H., Ott, H., Schierle, E., Schmitz, D., Tanaka, A., and Tjeng, L. H.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

We compare for Ho metal the x-ray absorption spectrum and the resonant soft x-ray diffraction spectra obtained at the $3d_{5/2} \to 4f$ ($M_5$) resonance for the magnetic 1st and 2nd order diffraction peaks $(0,0,\tau)$ and $(0,0,2\tau)$ with the result of an atomic multiplet calculation. We find a good agreement between experiment and simulation giving evidence that this kind of simulation is well suited to quantitatively analyze resonant soft x-ray diffraction data from correlated electron systems.

Published
2008

17. Temporal structures in electron spectra and charge sign effects in galactic cosmic rays

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Bagwell, C. (C.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Behlmann, M. (M.), Belyaev, N. (N.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V.), Bollweg, K. (K.), Bolster, J. (J.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V.), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoez, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V.), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Faldi, F. (F.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V.), Freeman, C. (C.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V.), Grandi, D. (D.), Graziani, M. (M.), Guracho, A. N. (A. N.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoez, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V.), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), LaVecchia, G. (G.), Lazzizzera, I. (I.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, H. L. (H. L.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, Q. Y. (Q. Y.), Li, S. (S.), Li, S. L. (S. L.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Liang, M. J. (M. J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Ocampo-Peleteiro, J. (J.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Plyaskin, V. (V.), Pohl, M. (M.), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Urban, T. (T.), Usoskin, I. (I.), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yelland, A. (A.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V.), Zichichi, A. (A.), Zuccon, P. (P.), Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Bagwell, C. (C.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Behlmann, M. (M.), Belyaev, N. (N.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V.), Bollweg, K. (K.), Bolster, J. (J.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V.), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoez, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V.), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Faldi, F. (F.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V.), Freeman, C. (C.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V.), Grandi, D. (D.), Graziani, M. (M.), Guracho, A. N. (A. N.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoez, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V.), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), LaVecchia, G. (G.), Lazzizzera, I. (I.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, H. L. (H. L.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, Q. Y. (Q. Y.), Li, S. (S.), Li, S. L. (S. L.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Liang, M. J. (M. J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Ocampo-Peleteiro, J. (J.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Plyaskin, V. (V.), Pohl, M. (M.), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Urban, T. (T.), Usoskin, I. (I.), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yelland, A. (A.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V.), Zichichi, A. (A.), and Zuccon, P. (P.)

Abstract

We present the precision measurements of 11 years of daily cosmic electron fluxes in the rigidity interval from 1.00 to 41.9 GV based on 2.0 x 10⁸ electrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The electron fluxes exhibit variations on multiple timescales. Recurrent electron flux variations with periods of 27 days, 13.5 days, and 9 days are observed. We find that the electron fluxes show distinctly different time variations from the proton fluxes. Remarkably, a hysteresis between the electron flux and the proton flux is observed with a significance of greater than 6 sigma at rigidities below 8.5 GV. Furthermore, significant structures in the electron-proton hysteresis are observed corresponding to sharp structures in both fluxes. This continuous daily electron data provide unique input to the understanding of the charge sign dependence of cosmic rays over an 11-year solar cycle.

Published
2023

18. Properties of cosmic-ray sulfur and determination of the composition of primary cosmic-ray carbon, neon, magnesium, and sulfur:ten-year results from the Alpha Magnetic Spectrometer

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Alpat, B. (B.), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Bagwell, C. (C.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Belyaev, N. (N.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V.), Bollweg, K. (K.), Bolster, J. (J.), Borchiellini, M. (M.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. (H.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V.), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V.), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Faldi, F. (F.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V.), Grandi, D. (D.), Graziani, M. (M.), Guracho, A. N. (A. N.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Huang, B. W. (B. W.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoz, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V.), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), LaVecchia, G. (G.), Lazzizzera, I. (I.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, H. L. (H. L.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, Q. Y. (Q. Y.), Li, S. (S.), Li, S. L. (S. L.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Liang, M. J. (M. J.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, S. D. (S. D.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Ocampo-Peleteiro, J. (J.), Oliva, A. (A.), Orcinha, M. (M.), Ottupara, M. A. (M. A.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Plyaskin, V. (V.), Poluianov, S. (Stepan), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Romaneehsen, L. (L.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Tian, Y. (Y.), Ting, S. C. (Samuel C. C.), Urban, T. (T.), Usoskin, I. (Ilya), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Wu, Y. (Y.), Xiao, J. N. (J. N.), Xiong, R. Q. (R. Q.), Xiong, X. Z. (X. Z.), Xu, W. (W.), Yan, Q. (Q.), Yang, H. T. (H. T.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yelland, A. (A.), Yi, H. (H.), You, Y. H. (Y. H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. (J.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V.), Zichichi, A. (A.), Zuccon, P. (P.), Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Alpat, B. (B.), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Bagwell, C. (C.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Belyaev, N. (N.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V.), Bollweg, K. (K.), Bolster, J. (J.), Borchiellini, M. (M.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. (H.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V.), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V.), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Faldi, F. (F.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V.), Grandi, D. (D.), Graziani, M. (M.), Guracho, A. N. (A. N.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Huang, B. W. (B. W.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoz, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V.), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), LaVecchia, G. (G.), Lazzizzera, I. (I.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, H. L. (H. L.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, Q. Y. (Q. Y.), Li, S. (S.), Li, S. L. (S. L.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Liang, M. J. (M. J.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, S. D. (S. D.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Ocampo-Peleteiro, J. (J.), Oliva, A. (A.), Orcinha, M. (M.), Ottupara, M. A. (M. A.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Plyaskin, V. (V.), Poluianov, S. (Stepan), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Romaneehsen, L. (L.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Tian, Y. (Y.), Ting, S. C. (Samuel C. C.), Urban, T. (T.), Usoskin, I. (Ilya), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Wu, Y. (Y.), Xiao, J. N. (J. N.), Xiong, R. Q. (R. Q.), Xiong, X. Z. (X. Z.), Xu, W. (W.), Yan, Q. (Q.), Yang, H. T. (H. T.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yelland, A. (A.), Yi, H. (H.), You, Y. H. (Y. H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. (J.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V.), Zichichi, A. (A.), and Zuccon, P. (P.)

Abstract

We report the properties of primary cosmic-ray sulfur (S) in the rigidity range 2.15 GV to 3.0 TV based on 0.38 x 10⁶ sulfur nuclei collected by the Alpha Magnetic Spectrometer experiment (AMS). We observed that above 90 GV the rigidity dependence of the S flux is identical to the rigidity dependence of Ne-Mg-Si fluxes, which is different from the rigidity dependence of the He-C-O-Fe fluxes. We found that, similar to N, Na, and Al cosmic rays, over the entire rigidity range, the traditional primary cosmic rays S, Ne, Mg, and C all have sizeable secondary components, and the S, Ne, and Mg fluxes are well described by the weighted sum of the primary silicon flux and the secondary fluorine flux, and the C flux is well described by the weighted sum of the primary oxygen flux and the secondary boron flux. The primary and secondary contributions of the traditional primary cosmic-ray fluxes of C, Ne, Mg, and S (even Z elements) are distinctly different from the primary and secondary contributions of the N, Na, and Al (odd Z elements) fluxes. The abundance ratio at the source for S/Si is 0.167 ± 0.006, for Ne/Si is 0.833 ± 0.025, for Mg/Si is 0.994 ± 0.029, and for C/O is 0.836 ± 0.025. These values are determined independent of cosmic-ray propagation.

Published
2023

27. Properties of a new group of cosmic nuclei:results from the alpha magnetic spectrometer on sodium, aluminum, and nitrogen

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Alpat, B. (B.), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Behlmann, M. (M.), Beranek, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Plyaskin, V. (V), Pohl, M. (M.), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schulz), Schwering, G. (G.), Seo, E. S. (E. S.), Shakfa, Z. (Z.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Tuysuz, C. (C.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), and Zuccon, P. (P.)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

We report the properties of sodium (Na) and aluminum (Al) cosmic rays in the rigidity range 2.15 GV to 3.0 TV based on 0.46 million sodium and 0.51 million aluminum nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. We found that Na and Al, together with nitrogen (N), belong to a distinct cosmic ray group. In this group, we observe that, similar to the N flux, both the Na flux and Al flux are well described by the sums of a primary cosmic ray component (proportional to the silicon flux) and a secondary cosmic ray component (proportional to the fluorine flux). The fraction of the primary component increases with rigidity for the N, Na, and Al fluxes and becomes dominant at the highest rigidities. The Na/Si and Al/Si abundance ratios at the source, 0.036 +/- 0.003 for Na/Si and 0.103 +/- 0.004 for Al/Si, are determined independent of cosmic ray propagation. Erratum Erratum: Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen [Phys. Rev. Lett. 127, 021101 (2021)] M. Aguilar et al. (AMS Collaboration), Phys. Rev. Lett. 127, 159901 (2021)

Published
2021

28. Properties of iron primary cosmic rays:results from the alpha magnetic spectrometer

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Allen, M. S. (M. S.), Alpat, B. (B.), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Behlmann, M. (M.), Beischer, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), de Boer, W. (W.), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Galaktionov, Y. (Y.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Kanishev, K. (K.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Lyu, S. S. (S. S.), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Mo, D. C. (D. C.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Piandani, R. (R.), Plyaskin, V. (V), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schulz), Schwering, G. (G.), Seo, E. S. (E. S.), Shakfa, Z. (Z.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Tuysuz, C. (C.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Acosta, M. V. (M. Vazquez), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), Zimmermann, N. (N.), and Zuccon, P. (P.)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

We report the observation of new properties of primary iron (Fe) cosmic rays in the rigidity range 2.65 GV to 3.0 TV with 0.62×10⁶ iron nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. Above 80.5 GV the rigidity dependence of the cosmic ray Fe flux is identical to the rigidity dependence of the primary cosmic ray He, C, and O fluxes, with the Fe/O flux ratio being constant at 0.155±0.006. This shows that unexpectedly Fe and He, C, and O belong to the same class of primary cosmic rays which is different from the primary cosmic rays Ne, Mg, and Si class.

Published
2021

29. Properties of heavy secondary fluorine cosmic rays:results from the alpha magnetic spectrometer

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Allen, M. S. (M. S.), Alpat, B. (B.), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Behlmann, M. (M.), Beranek, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Galaktionov, Y. (Y.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Kanishev, K. (K.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Lyu, S. S. (S. S.), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Mo, D. C. (D. C.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Piandani, R. (R.), Plyaskin, V. (V), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schulz), Schwering, G. (G.), Seo, E. S. (E. S.), Shakfa, Z. (Z.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Tuysuz, C. (C.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Vazquez Acosta, M. (M.), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), and Zuccon, P. (P.)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

Precise knowledge of the charge and rigidity dependence of the secondary cosmic ray fluxes and the secondary-to-primary flux ratios is essential in the understanding of cosmic ray propagation. We report the properties of heavy secondary cosmic ray fluorine F in the rigidity \(R\) range 2.15 GV to 2.9 TV based on 0.29 million events collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The fluorine spectrum deviates from a single power law above 200 GV. The heavier secondary-to-primary F/Si flux ratio rigidity dependence is distinctly different from the lighter B/O (or B/C) rigidity dependence. In particular, above 10 GV, the \(\frac{F/Si}{B/O}\) ratio can be described by a power law \(R^{δ}\) with \(δ\)=0.052±0.007. This shows that the propagation properties of heavy cosmic rays, from F to Si, are different from those of light cosmic rays, from He to O, and that the secondary cosmic rays have two classes.

Published
2021

30. Periodicities in the daily proton fluxes from 2011 to 2019 measured by the Alpha Magnetic Spectrometer on the International Space Station from 1 to 100 GV

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Battiston, R. (R.), Behlmann, M. (M.), Beranek, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoz, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Plyaskin, V. (V), Pohl, M. (M.), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shakfa, Z. (Z.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Vazquez Acosta, M. (M.), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), Zuccon, P. (P.), Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Battiston, R. (R.), Behlmann, M. (M.), Beranek, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, G. R. (G. R.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dass, A. (A.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Karagoz, G. (G.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Krasnopevtsev, D. (D.), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, J. H. (J. H.), Li, Z. H. (Z. H.), Liang, J. (J.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, J. H. (J. H.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Luo, X. (Xi), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Medvedeva, T. (T.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mikhailov, V. V. (V. V.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Negrete, J. (J.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Plyaskin, V. (V), Pohl, M. (M.), Poluianov, S. (S.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Robyn, E. (E.), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), von Dratzig, A. S. (A. Schultz), Schwering, G. (G.), Seo, E. S. (E. S.), Shakfa, Z. (Z.), Shan, B. S. (B. S.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Song, X. J. (X. J.), Sonnabend, R. (R.), Strigari, L. (L.), Su, T. (T.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valencia-Otero, M. (M.), Valente, E. (E.), Valtonen, E. (E.), Vazquez Acosta, M. (M.), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, C. X. (C. X.), Wang, L. (L.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Y. (Yu), Wang, Z. M. (Z. M.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yashin, I. I. (I. I.), Yi, H. (H.), Yu, Y. M. (Y. M.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, C. (C.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), and Zuccon, P. (P.)

Abstract

We present the precision measurement of the daily proton fluxes in cosmic rays from May 20, 2011 to October 29, 2019 (a total of 2824 days or 114 Bartels rotations) in the rigidity interval from 1 to 100 GV based on 5.5 x 10⁹ protons collected with the Alpha Magnetic Spectrometer aboard the International Space Station. The proton fluxes exhibit variations on multiple timescales. From 2014 to 2018, we observed recurrent 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. The rigidity dependence of the 27-day periodicity is different from the rigidity dependences of 9-day and 13.5-day periods. Unexpectedly, the strength of 9-day and 13.5-day periodicities increases with increasing rigidities up to similar to 10 GV and similar to 20 GV, respectively. Then the strength of the periodicities decreases with increasing rigidity up to 100 GV.

Published
2021

36. The Alpha Magnetic Spectrometer (AMS) on the international space station:Part II — results from the first seven years

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Bates, J. (J.), Battiston, R. (R.), Behlmann, M. (M.), Beischer, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), de Boer, W. (W.), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. (Mj), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dai, Y. M. (Y. M.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Galaktionov, Y. (Y.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gebauer, I. (I), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Guo, K. H. (K. H.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Huang, Z. C. (Z. C.), Hungerford, W. (W.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Kanishev, K. (K.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. (E.), Laurenti, G. (G.), Lazzizzera, I. (I), Lebedev, A. (A.), Lee, H. T. (H. T.), Lee, S. C. (S. C.), Leluc, C. (C.), Li, J. Q. (J. Q.), Li, M. (M.), Li, Q. (Q.), Li, S. (S.), Li, T. X. (T. X.), Li, Z. H. (Z. H.), Light, C. (C.), Lin, C. H. (C. H.), Lippert, T. (T.), Liu, Z. (Z.), Lu, S. Q. (S. Q.), Lu, Y. S. (Y. S.), Luebelsmeyer, K. (K.), Luo, J. Z. (J. Z.), Lyu, S. S. (S. S.), Machate, F. (F.), Mana, C. (C.), Marin, J. (J.), Marquardt, J. (J.), Martin, T. (T.), Martinez, G. (G.), Masi, N. (N.), Maurin, D. (D.), Menchaca-Rocha, A. (A.), Meng, Q. (Q.), Mo, D. C. (D. C.), Molero, M. (M.), Mott, P. (P.), Mussolin, L. (L.), Ni, J. Q. (J. Q.), Nikonov, N. (N.), Nozzoli, F. (F.), Oliva, A. (A.), Orcinha, M. (M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Plyaskin, V. (V), Pohl, M. (M.), Porter, S. (S.), Qi, X. M. (X. M.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), Schmidt, S. M. (S. M.), von Dratzig, A. S. (A. Schulz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Shi, J. Y. (J. Y.), Siedenburg, T. (T.), Solano, C. (C.), Song, J. W. (J. W.), Sonnabend, R. (R.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Tuysuz, C. (C.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valente, E. (E.), Valtonen, E. (E.), Vazquez Acosta, M. (M.), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Z. X. (Z. X.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yi, H. (H.), Yu, Y. J. (Y. J.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), Zimmermann, N. (N.), and Zuccon, P. (P.)

Subjects
Cosmic ray detectors, Particle dark matter, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray composition & spectra, Cosmic ray propagation, International space station, Alpha Magnetic Spectrometer, Cosmic ray sources, Cosmic ray acceleration, Particle astrophysics
Abstract

The Alpha Magnetic Spectrometer (AMS) is a precision particle physics detector on the International Space Station (ISS) conducting a unique, long-duration mission of fundamental physics research in space. The physics objectives include the precise studies of the origin of dark matter, antimatter, and cosmic rays as well as the exploration of new phenomena. Following a 16-year period of construction and testing, and a precursor flight on the Space Shuttle, AMS was installed on the ISS on May 19, 2011. In this report we present results based on 120 billion charged cosmic ray events up to multi-TeV energies. This includes the fluxes of positrons, electrons, antiprotons, protons, and nuclei. These results provide unexpected information, which cannot be explained by the current theoretical models. The accuracy and characteristics of the data, simultaneously from many different types of cosmic rays, provide unique input to the understanding of origins, acceleration, and propagation of cosmic rays.

Published
2020

37. Properties of neon, magnesium, and silicon primary cosmic rays results from the Alpha Magnetic Spectrometer

Author

Aguilar, M. (M.), Cavasonza, L. A. (L. Ali), Ambrosi, G. (G.), Arruda, L. (L.), Attig, N. (N.), Barao, F. (F.), Barrin, L. (L.), Bartoloni, A. (A.), Basegmez-du Pree, S. (S.), Battiston, R. (R.), Becker, U. (U.), Behlmann, M. (M.), Beischer, B. (B.), Berdugo, J. (J.), Bertucci, B. (B.), Bindi, V. (V), de Boer, W. (W.), Bollweg, K. (K.), Borgia, B. (B.), Boschini, M. J. (M. J.), Bourquin, M. (M.), Bueno, E. F. (E. F.), Burger, J. (J.), Burger, W. J. (W. J.), Burmeister, S. (S.), Cai, X. D. (X. D.), Capell, M. (M.), Casaus, J. (J.), Castellini, G. (G.), Cervelli, F. (F.), Chang, Y. H. (Y. H.), Chen, G. M. (G. M.), Chen, H. S. (H. S.), Chen, Y. (Y.), Cheng, L. (L.), Chou, H. Y. (H. Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dai, Y. M. (Y. M.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Galaktionov, Y. (Y.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gebauer, I. (I), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Guo, K. H. (K. H.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Huang, Z. C. (Z. C.), Incagli, M. (M.), Jang, W. Y. (W. Y.), Jia, Y. (Yi), Jinchi, H. (H.), Kanishev, K. (K.), Khiali, B. (B.), Kim, G. N. (G. N.), Kirn, T. (Th), Konyushikhin, M. (M.), Kounina, O. (O.), Kounine, A. (A.), Koutsenko, V. (V), Kuhlman, A. (A.), Kulemzin, A. (A.), La Vacca, G. (G.), Laudi, E. 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Y.), Chouridou, S. (S.), Choutko, V. (V), Chung, C. H. (C. H.), Clark, C. (C.), Coignet, G. (G.), Consolandi, C. (C.), Contin, A. (A.), Corti, C. (C.), Cui, Z. (Z.), Dadzie, K. (K.), Dai, Y. M. (Y. M.), Delgado, C. (C.), Della Torre, S. (S.), Demirkoz, M. B. (M. B.), Derome, L. (L.), Di Falco, S. (S.), Di Felice, V. (V), Diaz, C. (C.), Dimiccoli, F. (F.), von Doetinchem, P. (P.), Dong, F. (F.), Donnini, F. (F.), Duranti, M. (M.), Egorov, A. (A.), Eline, A. (A.), Feng, J. (J.), Fiandrini, E. (E.), Fisher, P. (P.), Formato, V. (V), Freeman, C. (C.), Galaktionov, Y. (Y.), Gamez, C. (C.), Garcia-Lopez, R. J. (R. J.), Gargiulo, C. (C.), Gast, H. (H.), Gebauer, I. (I), Gervasi, M. (M.), Giovacchini, F. (F.), Gomez-Coral, D. M. (D. M.), Gong, J. (J.), Goy, C. (C.), Grabski, V. (V), Grandi, D. (D.), Graziani, M. (M.), Guo, K. H. (K. H.), Haino, S. (S.), Han, K. C. (K. C.), Hashmani, R. K. (R. K.), He, Z. H. (Z. H.), Heber, B. (B.), Hsieh, T. H. (T. H.), Hu, J. Y. (J. Y.), Huang, Z. C. (Z. 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(M.), Palermo, M. (M.), Palmonari, F. (F.), Paniccia, M. (M.), Pashnin, A. (A.), Pauluzzi, M. (M.), Pensotti, S. (S.), Phan, H. D. (H. D.), Piandani, R. (R.), Plyaskin, V. (V), Poluianov, S. (S.), Qi, X. M. (X. M.), Qin, X. (X.), Qu, Z. Y. (Z. Y.), Quadrani, L. (L.), Rancoita, P. G. (P. G.), Rapin, D. (D.), Conde, A. R. (A. Reina), Rosier-Lees, S. (S.), Rozhkov, A. (A.), Rozza, D. (D.), Sagdeev, R. (R.), Schael, S. (S.), Schmidt, S. M. (S. M.), von Dratzig, A. S. (A. Schulz), Schwering, G. (G.), Seo, E. S. (E. S.), Shan, B. S. (B. S.), Shi, J. Y. (J. Y.), Siedenburg, T. (T.), Solano, C. (C.), Sonnabend, R. (R.), Song, J. W. (J. W.), Sun, Q. (Q.), Sun, Z. T. (Z. T.), Tacconi, M. (M.), Tang, X. W. (X. W.), Tang, Z. C. (Z. C.), Tian, J. (J.), Ting, S. C. (Samuel C. C.), Ting, S. M. (S. M.), Tomassetti, N. (N.), Torsti, J. (J.), Tuysuz, C. (C.), Urban, T. (T.), Usoskin, I. (I), Vagelli, V. (V.), Vainio, R. (R.), Valente, E. (E.), Valtonen, E. (E.), Vazquez Acosta, M. (M.), Vecchi, M. (M.), Velasco, M. (M.), Vialle, J. P. (J. P.), Wallmann, C. (C.), Wang, L. Q. (L. Q.), Wang, N. H. (N. H.), Wang, Q. L. (Q. L.), Wang, S. (S.), Wang, X. (X.), Wang, Z. X. (Z. X.), Wei, J. (J.), Weng, Z. L. (Z. L.), Wu, H. (H.), Xiong, R. Q. (R. Q.), Xu, W. (W.), Yan, Q. (Q.), Yang, Y. (Y.), Yi, H. (H.), Yu, Y. J. (Y. J.), Yu, Z. Q. (Z. Q.), Zannoni, M. (M.), Zhang, C. (C.), Zhang, F. (F.), Zhang, F. Z. (F. Z.), Zhang, J. H. (J. H.), Zhang, Z. (Z.), Zhao, F. (F.), Zheng, Z. M. (Z. M.), Zhuang, H. L. (H. L.), Zhukov, V. (V), Zichichi, A. (A.), Zimmermann, N. (N.), and Zuccon, P. (P.)

Abstract

We report the observation of new properties of primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in the rigidity range 2.15 GV to 3.0 TV with 1.8×106 Ne, 2.2×106 Mg, and 1.6×106 Si nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The Ne and Mg spectra have identical rigidity dependence above 3.65 GV. The three spectra have identical rigidity dependence above 86.5 GV, deviate from a single power law above 200 GV, and harden in an identical way. Unexpectedly, above 86.5 GV the rigidity dependence of primary cosmic rays Ne, Mg, and Si spectra is different from the rigidity dependence of primary cosmic rays He, C, and O. This shows that the Ne, Mg, and Si and He, C, and O are two different classes of primary cosmic rays.

Published
2020

50. Real-space phase field investigation of evolving magnetic domains and twin structures in a ferromagnetic shape memory alloy.

Author

Wu, H. H., Pramanick, A., Ke, Y. B., and Wang, X.-L.

Subjects
*FERROMAGNETIC materials, *FERROMAGNETIC resonance, *MAGNETIC properties of shape memory alloys, *MEASUREMENT of magnetic properties, *LANDAU-lifshitz equation, *MARTENSITIC structure, *MATHEMATICAL models
Abstract

A real-space phase field model combining Landau-Lifshitz-Gilbert equation and time-dependent Ginzburg-Landau equation is developed to investigate the evolution of ferromagnetic domains and martensitic twin structures in a ferromagnetic shape memory alloy at different lengthscales. Both domain and twin structures are obtained by simultaneously solving for minimization of magnetic, elastic, and magnetoelastic coupling energy terms via a nonlinear finite element method. The model is applied to simulate magneto-structural evolution within a nanoparticle and a bulk single-crystal of the alloy Ni2MnGa, which are subjected to mechanical strains. It is shown that a nanoparticle contains magnetic vortex structures within a single twin variant, whereas for a bulk crystal both 90° and 180° domain structures are present within multiple twin variants. [ABSTRACT FROM AUTHOR]

Published
2016
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