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  1. Article ; Online: Interval Fuzzy Model for Robust Aircraft IMU Sensors Fault Detection.

    Crispoltoni, Michele / Fravolini, Mario Luca / Balzano, Fabio / D'Urso, Stephane / Napolitano, Marcello Rosario

    Sensors (Basel, Switzerland)

    2018  Volume 18, Issue 8

    Abstract: This paper proposes a data-based approach for a robust fault detection (FD) of the inertial measurement unit (IMU) sensors of an aircraft. Fuzzy interval models (FIMs) have been introduced for coping with the significant modeling uncertainties caused by ... ...

    Abstract This paper proposes a data-based approach for a robust fault detection (FD) of the inertial measurement unit (IMU) sensors of an aircraft. Fuzzy interval models (FIMs) have been introduced for coping with the significant modeling uncertainties caused by poorly modeled aerodynamics. The proposed FIMs are used to compute robust prediction intervals for the measurements provided by the IMU sensors. Specifically, a nonlinear neural network (NN) model is used as central prediction of the sensor response while the uncertainty around the central estimation is captured by the FIM model. The uncertainty has been also modelled using a conventional linear Interval Model (IM) approach; this allows a quantitative evaluation of the benefits provided by the FIM approach. The identification of the IMs and of the FIMs was formalized as a linear matrix inequality (LMI) optimization problem using as cost function the (mean) amplitude of the prediction interval and as optimization variables the parameters defining the amplitudes of the intervals of the IMs and FIMs. Based on the identified models, FD validation tests have been successfully conducted using actual flight data of a P92 Tecnam aircraft by artificially injecting additive fault signals on the fault free IMU readings.
    Language English
    Publishing date 2018-08-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s18082488
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Towards Understanding the Origin of Cosmic-Ray Electrons.

    Aguilar, M / Ali Cavasonza, L / Alpat, B / Ambrosi, G / Arruda, L / Attig, N / Azzarello, P / Bachlechner, A / Barao, F / Barrau, A / Barrin, L / Bartoloni, A / Basara, L / Başeğmez-du Pree, S / Battiston, R / Becker, U / Behlmann, M / Beischer, B / Berdugo, J /
    Bertucci, B / Bindi, V / de Boer, W / Bollweg, K / Borgia, B / Boschini, M J / Bourquin, M / Bueno, E F / Burger, J / Burger, W J / Cai, X D / Capell, M / Caroff, S / Casaus, J / Castellini, G / Cervelli, F / Chang, Y H / Chen, G M / Chen, H S / Chen, Y / Cheng, L / Chou, H Y / Choutko, V / Chung, C H / Clark, C / Coignet, G / Consolandi, C / Contin, A / Corti, C / Crispoltoni, M / Cui, Z / Dadzie, K / Dai, Y M / Datta, A / Delgado, C / Della Torre, S / Demirköz, M B / Derome, L / Di Falco, S / Di Felice, V / Dimiccoli, F / Díaz, C / von Doetinchem, P / Dong, F / Donnini, F / Duranti, M / Egorov, A / Eline, A / Eronen, T / Feng, J / Fiandrini, E / Fisher, P / Formato, V / Galaktionov, Y / García-López, R J / Gargiulo, C / Gast, H / Gebauer, I / Gervasi, M / Giovacchini, F / Gómez-Coral, D M / Gong, J / Goy, C / Grabski, V / Grandi, D / Graziani, M / Guo, K H / Haino, S / Han, K C / He, Z H / Heil, M / Hsieh, T H / Huang, H / Huang, Z C / Incagli, M / Jia, Yi / Jinchi, H / Kanishev, K / Khiali, B / Kirn, Th / Konak, C / Kounina, O / Kounine, A / Koutsenko, V / Kulemzin, A / La Vacca, G / Laudi, E / Laurenti, G / Lazzizzera, I / Lebedev, A / Lee, H T / Lee, S C / Leluc, C / Li, J Q / Li, Q / Li, T X / Li, Z H / Light, C / Lin, C H / Lippert, T / Liu, F Z / Liu, Hu / Liu, Z / Lu, S Q / Lu, Y S / Luebelsmeyer, K / Luo, F / Luo, J Z / Luo, Xi / Lyu, S S / Machate, F / Mañá, C / Marín, J / Martin, T / Martínez, G / Masi, N / Maurin, D / Menchaca-Rocha, A / Meng, Q / Mo, D C / Molero, M / Mott, P / Mussolin, L / Nelson, T / Ni, J Q / Nikonov, N / Nozzoli, F / Oliva, A / Orcinha, M / Palermo, M / Palmonari, F / Paniccia, M / Pashnin, A / Pauluzzi, M / Pensotti, S / Perrina, C / Phan, H D / Picot-Clemente, N / Plyaskin, V / Pohl, M / Poireau, V / Popkow, A / Quadrani, L / Qi, X M / Qin, X / Qu, Z Y / Rancoita, P G / Rapin, D / Conde, A Reina / Rosier-Lees, S / Rozhkov, A / Rozza, D / Sagdeev, R / Solano, C / Schael, S / Schmidt, S M / von Dratzig, A Schulz / Schwering, G / Seo, E S / Shan, B S / Shi, J Y / Siedenburg, T / Song, J W / Sun, Z T / Tacconi, M / Tang, X W / Tang, Z C / Tian, J / Ting, Samuel C C / Ting, S M / Tomassetti, N / Torsti, J / Urban, T / Vagelli, V / Valente, E / Valtonen, E / Acosta, M Vázquez / Vecchi, M / Velasco, M / Vialle, J P / Vizán, J / Wang, L Q / Wang, N H / Wang, Q L / Wang, X / Wang, X Q / Wang, Z X / Wei, J / Weng, Z L / Wu, H / Xiong, R Q / Xu, W / Yan, Q / Yang, Y / Yi, H / Yu, Y J / Yu, Z Q / Zannoni, M / Zeissler, S / Zhang, C / Zhang, F / Zhang, J H / Zhang, Z / Zhao, F / Zheng, Z M / Zhuang, H L / Zhukov, V / Zichichi, A / Zimmermann, N / Zuccon, P

    Physical review letters

    2019  Volume 122, Issue 10, Page(s) 101101

    Abstract: Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1×10^{6} electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron ... ...

    Abstract Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1×10^{6} electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. The electron flux exhibits a significant excess starting from 42.1_{-5.2}^{+5.4}  GeV compared to the lower energy trends, but the nature of this excess is different from the positron flux excess above 25.2±1.8  GeV. Contrary to the positron flux, which has an exponential energy cutoff of 810_{-180}^{+310}  GeV, at the 5σ level the electron flux does not have an energy cutoff below 1.9 TeV. In the entire energy range the electron flux is well described by the sum of two power law components. The different behavior of the cosmic-ray electrons and positrons measured by the Alpha Magnetic Spectrometer is clear evidence that most high energy electrons originate from different sources than high energy positrons.
    Language English
    Publishing date 2019-04-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.122.101101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Towards Understanding the Origin of Cosmic-Ray Positrons.

    Aguilar, M / Ali Cavasonza, L / Ambrosi, G / Arruda, L / Attig, N / Azzarello, P / Bachlechner, A / Barao, F / Barrau, A / Barrin, L / Bartoloni, A / Basara, L / Başeğmez-du Pree, S / Battiston, R / Becker, U / Behlmann, M / Beischer, B / Berdugo, J / Bertucci, B /
    Bindi, V / de Boer, W / Bollweg, K / Borgia, B / Boschini, M J / Bourquin, M / Bueno, E F / Burger, J / Burger, W J / Cai, X D / Capell, M / Caroff, S / Casaus, J / Castellini, G / Cervelli, F / Chang, Y H / Chen, G M / Chen, H S / Chen, Y / Cheng, L / Chou, H Y / Choutko, V / Chung, C H / Clark, C / Coignet, G / Consolandi, C / Contin, A / Corti, C / Crispoltoni, M / Cui, Z / Dadzie, K / Dai, Y M / Datta, A / Delgado, C / Della Torre, S / Demirköz, M B / Derome, L / Di Falco, S / Dimiccoli, F / Díaz, C / von Doetinchem, P / Dong, F / Donnini, F / Duranti, M / Egorov, A / Eline, A / Eronen, T / Feng, J / Fiandrini, E / Fisher, P / Formato, V / Galaktionov, Y / García-López, R J / Gargiulo, C / Gast, H / Gebauer, I / Gervasi, M / Giovacchini, F / Gómez-Coral, D M / Gong, J / Goy, C / Grabski, V / Grandi, D / Graziani, M / Guo, K H / Haino, S / Han, K C / He, Z H / Heil, M / Hsieh, T H / Huang, H / Huang, Z C / Incagli, M / Jia, Yi / Jinchi, H / Kanishev, K / Khiali, B / Kirn, Th / Konak, C / Kounina, O / Kounine, A / Koutsenko, V / Kulemzin, A / La Vacca, G / Laudi, E / Laurenti, G / Lazzizzera, I / Lebedev, A / Lee, H T / Lee, S C / Leluc, C / Li, J Q / Li, Q / Li, T X / Li, Z H / Light, C / Lin, C H / Lippert, T / Liu, F Z / Liu, Hu / Liu, Z / Lu, S Q / Lu, Y S / Luebelsmeyer, K / Luo, F / Luo, J Z / Luo, Xi / Lyu, S S / Machate, F / Mañá, C / Marín, J / Martin, T / Martínez, G / Masi, N / Maurin, D / Menchaca-Rocha, A / Meng, Q / Mo, D C / Molero, M / Mott, P / Mussolin, L / Nelson, T / Ni, J Q / Nikonov, N / Nozzoli, F / Oliva, A / Orcinha, M / Palermo, M / Palmonari, F / Paniccia, M / Pashnin, A / Pauluzzi, M / Pensotti, S / Perrina, C / Phan, H D / Picot-Clemente, N / Plyaskin, V / Pohl, M / Poireau, V / Popkow, A / Quadrani, L / Qi, X M / Qin, X / Qu, Z Y / Rancoita, P G / Rapin, D / Conde, A Reina / Rosier-Lees, S / Rozhkov, A / Rozza, D / Sagdeev, R / Solano, C / Schael, S / Schmidt, S M / Schulz von Dratzig, A / Schwering, G / Seo, E S / Shan, B S / Shi, J Y / Siedenburg, T / Song, J W / Sun, Z T / Tacconi, M / Tang, X W / Tang, Z C / Tian, J / Ting, Samuel C C / Ting, S M / Tomassetti, N / Torsti, J / Urban, T / Vagelli, V / Valente, E / Valtonen, E / Vázquez Acosta, M / Vecchi, M / Velasco, M / Vialle, J P / Vizán, J / Wang, L Q / Wang, N H / Wang, Q L / Wang, X / Wang, X Q / Wang, Z X / Wei, J / Weng, Z L / Wu, H / Xiong, R Q / Xu, W / Yan, Q / Yang, Y / Yi, H / Yu, Y J / Yu, Z Q / Zannoni, M / Zeissler, S / Zhang, C / Zhang, F / Zhang, J H / Zhang, Z / Zhao, F / Zheng, Z M / Zhuang, H L / Zhukov, V / Zichichi, A / Zimmermann, N / Zuccon, P

    Physical review letters

    2019  Volume 122, Issue 4, Page(s) 41102

    Abstract: Precision measurements of cosmic ray positrons are presented up to 1 TeV based on 1.9 million positrons collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron flux exhibits complex energy dependence. Its distinctive ...

    Abstract Precision measurements of cosmic ray positrons are presented up to 1 TeV based on 1.9 million positrons collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron flux exhibits complex energy dependence. Its distinctive properties are (a) a significant excess starting from 25.2±1.8  GeV compared to the lower-energy, power-law trend, (b) a sharp dropoff above 284_{-64}^{+91}  GeV, (c) in the entire energy range the positron flux is well described by the sum of a term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies, and a new source term of positrons, which dominates at high energies, and (d) a finite energy cutoff of the source term of E_{s}=810_{-180}^{+310}  GeV is established with a significance of more than 4σ. These experimental data on cosmic ray positrons show that, at high energies, they predominantly originate either from dark matter annihilation or from other astrophysical sources.
    Language English
    Publishing date 2019-02-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.122.041102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station.

    Aguilar, M / Ali Cavasonza, L / Alpat, B / Ambrosi, G / Arruda, L / Attig, N / Aupetit, S / Azzarello, P / Bachlechner, A / Barao, F / Barrau, A / Barrin, L / Bartoloni, A / Basara, L / Başeğmez-du Pree, S / Battarbee, M / Battiston, R / Becker, U / Behlmann, M /
    Beischer, B / Berdugo, J / Bertucci, B / Bindel, K F / Bindi, V / de Boer, W / Bollweg, K / Bonnivard, V / Borgia, B / Boschini, M J / Bourquin, M / Bueno, E F / Burger, J / Burger, W J / Cai, X D / Capell, M / Caroff, S / Casaus, J / Castellini, G / Cervelli, F / Chang, Y H / Chen, A I / Chen, G M / Chen, H S / Chen, Y / Cheng, L / Chou, H Y / Choumilov, E / Choutko, V / Chung, C H / Clark, C / Clavero, R / Coignet, G / Consolandi, C / Contin, A / Corti, C / Creus, W / Crispoltoni, M / Cui, Z / Dadzie, K / Dai, Y M / Datta, A / Delgado, C / Della Torre, S / Demirköz, M B / Derome, L / Di Falco, S / Dimiccoli, F / Díaz, C / von Doetinchem, P / Dong, F / Donnini, F / Duranti, M / Egorov, A / Eline, A / Eronen, T / Feng, J / Fiandrini, E / Fisher, P / Formato, V / Galaktionov, Y / Gallucci, G / García-López, R J / Gargiulo, C / Gast, H / Gebauer, I / Gervasi, M / Ghelfi, A / Giovacchini, F / Gómez-Coral, D M / Gong, J / Goy, C / Grabski, V / Grandi, D / Graziani, M / Guo, K H / Haino, S / Han, K C / He, Z H / Heil, M / Hsieh, T H / Huang, H / Huang, Z C / Incagli, M / Jia, Yi / Jinchi, H / Kanishev, K / Khiali, B / Kirn, Th / Konak, C / Kounina, O / Kounine, A / Koutsenko, V / Kulemzin, A / La Vacca, G / Laudi, E / Laurenti, G / Lazzizzera, I / Lebedev, A / Lee, H T / Lee, S C / Leluc, C / Li, H S / Li, J Q / Li, Q / Li, T X / Li, Z H / Li, Z Y / Lin, C H / Lipari, P / Lippert, T / Liu, D / Liu, Hu / Liu, Z / Lordello, V D / Lu, S Q / Lu, Y S / Luebelsmeyer, K / Luo, F / Luo, J Z / Lyu, S S / Machate, F / Mañá, C / Marín, J / Martin, T / Martínez, G / Masi, N / Maurin, D / Menchaca-Rocha, A / Meng, Q / Mikuni, V M / Mo, D C / Mott, P / Mussolin, L / Nelson, T / Ni, J Q / Nikonov, N / Nozzoli, F / Oliva, A / Orcinha, M / Palermo, M / Palmonari, F / Palomares, C / Paniccia, M / Pauluzzi, M / Pensotti, S / Perrina, C / Phan, H D / Picot-Clemente, N / Pilo, F / Plyaskin, V / Pohl, M / Poireau, V / Quadrani, L / Qi, X M / Qin, X / Qu, Z Y / Räihä, T / Rancoita, P G / Rapin, D / Ricol, J S / Rosier-Lees, S / Rozhkov, A / Rozza, D / Sagdeev, R / Schael, S / Schmidt, S M / Schulz von Dratzig, A / Schwering, G / Seo, E S / Shan, B S / Shi, J Y / Siedenburg, T / Song, J W / Tacconi, M / Tang, X W / Tang, Z C / Tescaro, D / Tian, J / Ting, Samuel C C / Ting, S M / Tomassetti, N / Torsti, J / Urban, T / Vagelli, V / Valente, E / Valtonen, E / Vázquez Acosta, M / Vecchi, M / Velasco, M / Vialle, J P / Wang, L Q / Wang, N H / Wang, Q L / Wang, X / Wang, X Q / Wang, Z X / Wei, C C / Wei, J / Weng, Z L / Whitman, K / Wu, H / Xiong, R Q / Xu, W / Yan, Q / Yang, M / Yang, Y / Yi, H / Yu, Y J / Yu, Z Q / Zannoni, M / Zeissler, S / Zhang, C / Zhang, F / Zhang, J / Zhang, J H / Zhang, S W / Zhang, Z / Zheng, Z M / Zhuang, H L / Zhukov, V / Zichichi, A / Zimmermann, N / Zuccon, P

    Physical review letters

    2018  Volume 121, Issue 5, Page(s) 51103

    Abstract: A precision measurement of the nitrogen flux with rigidity (momentum per unit charge) from 2.2 GV to 3.3 TV based on 2.2×10^{6} events is presented. The detailed rigidity dependence of the nitrogen flux spectral index is presented for the first time. The ...

    Abstract A precision measurement of the nitrogen flux with rigidity (momentum per unit charge) from 2.2 GV to 3.3 TV based on 2.2×10^{6} events is presented. The detailed rigidity dependence of the nitrogen flux spectral index is presented for the first time. The spectral index rapidly hardens at high rigidities and becomes identical to the spectral indices of primary He, C, and O cosmic rays above ∼700  GV. We observed that the nitrogen flux Φ_{N} can be presented as the sum of its primary component Φ_{N}^{P} and secondary component Φ_{N}^{S}, Φ_{N}=Φ_{N}^{P}+Φ_{N}^{S}, and we found Φ_{N} is well described by the weighted sum of the oxygen flux Φ_{O} (primary cosmic rays) and the boron flux Φ_{B} (secondary cosmic rays), with Φ_{N}^{P}=(0.090±0.002)×Φ_{O} and Φ_{N}^{S}=(0.62±0.02)×Φ_{B} over the entire rigidity range. This corresponds to a change of the contribution of the secondary cosmic ray component in the nitrogen flux from 70% at a few GV to <30% above 1 TV.
    Language English
    Publishing date 2018-08-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.051103
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station.

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

    Physical review letters

    2018  Volume 121, Issue 5, Page(s) 51102

    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 ... ...

    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.
    Language English
    Publishing date 2018-08-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
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    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.051102
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  6. Article ; Online: Observation of Fine Time Structures in the Cosmic Proton and Helium Fluxes with the Alpha Magnetic Spectrometer on the International Space Station.

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

    Physical review letters

    2018  Volume 121, Issue 5, Page(s) 51101

    Abstract: We present the precision measurement from May 2011 to May 2017 (79 Bartels rotations) of the proton fluxes at rigidities from 1 to 60 GV and the helium fluxes from 1.9 to 60 GV based on a total of 1×10^{9} events collected with the Alpha Magnetic ... ...

    Abstract We present the precision measurement from May 2011 to May 2017 (79 Bartels rotations) of the proton fluxes at rigidities from 1 to 60 GV and the helium fluxes from 1.9 to 60 GV based on a total of 1×10^{9} events collected with the Alpha Magnetic Spectrometer aboard the International Space Station. This measurement is in solar cycle 24, which has the solar maximum in April 2014. We observed that, below 40 GV, the proton flux and the helium flux show nearly identical fine structures in both time and relative amplitude. The amplitudes of the flux structures decrease with increasing rigidity and vanish above 40 GV. The amplitudes of the structures are reduced during the time period, which started one year after solar maximum, when the proton and helium fluxes steadily increase. Above ∼3  GV the p/He flux ratio is time independent. We observed that below ∼3  GV the ratio has a long-term decrease coinciding with the period during which the fluxes start to rise.
    Language English
    Publishing date 2018-08-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.051101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station.

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

    Physical review letters

    2018  Volume 120, Issue 2, Page(s) 21101

    Abstract: We report on the observation of new properties of secondary cosmic rays Li, Be, and B measured in the rigidity (momentum per unit charge) range 1.9 GV to 3.3 TV with a total of 5.4×10^{6} nuclei collected by AMS during the first five years of operation ... ...

    Abstract We report on the observation of new properties of secondary cosmic rays Li, Be, and B measured in the rigidity (momentum per unit charge) range 1.9 GV to 3.3 TV with a total of 5.4×10^{6} nuclei collected by AMS during the first five years of operation aboard the International Space Station. The Li and B fluxes have an identical rigidity dependence above 7 GV and all three fluxes have an identical rigidity dependence above 30 GV with the Li/Be flux ratio of 2.0±0.1. The three fluxes deviate from a single power law above 200 GV in an identical way. This behavior of secondary cosmic rays has also been observed in the AMS measurement of primary cosmic rays He, C, and O but the rigidity dependences of primary cosmic rays and of secondary cosmic rays are distinctly different. In particular, above 200 GV, the secondary cosmic rays harden more than the primary cosmic rays.
    Language English
    Publishing date 2018-01-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.120.021101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station.

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

    Physical review letters

    2017  Volume 119, Issue 25, Page(s) 251101

    Abstract: We report the observation of new properties of primary cosmic rays He, C, and O measured in the rigidity (momentum/charge) range 2 GV to 3 TV with 90×10^{6} helium, 8.4×10^{6} carbon, and 7.0×10^{6} oxygen nuclei collected by the Alpha Magnetic ... ...

    Abstract We report the observation of new properties of primary cosmic rays He, C, and O measured in the rigidity (momentum/charge) range 2 GV to 3 TV with 90×10^{6} helium, 8.4×10^{6} carbon, and 7.0×10^{6} oxygen nuclei collected by the Alpha Magnetic Spectrometer (AMS) during the first five years of operation. Above 60 GV, these three spectra have identical rigidity dependence. They all deviate from a single power law above 200 GV and harden in an identical way.
    Language English
    Publishing date 2017-12-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.119.251101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station.

    Aguilar, M / Ali Cavasonza, L / Alpat, B / Ambrosi, G / Arruda, L / Attig, N / Aupetit, S / Azzarello, P / Bachlechner, A / Barao, F / Barrau, A / Barrin, L / Bartoloni, A / Basara, L / Başeǧmez-du Pree, S / Battarbee, M / Battiston, R / Bazo, J / Becker, U /
    Behlmann, M / Beischer, B / Berdugo, J / Bertucci, B / Bindi, V / Boella, G / de Boer, W / Bollweg, K / Bonnivard, V / Borgia, B / Boschini, M J / Bourquin, M / Bueno, E F / Burger, J / Cadoux, F / Cai, X D / Capell, M / Caroff, S / Casaus, J / Castellini, G / Cernuda, I / Cervelli, F / Chae, M J / Chang, Y H / Chen, A I / Chen, G M / Chen, H S / Cheng, L / Chou, H Y / Choumilov, E / Choutko, V / Chung, C H / Clark, C / Clavero, R / Coignet, G / Consolandi, C / Contin, A / Corti, C / Coste, B / Creus, W / Crispoltoni, M / Cui, Z / Dai, Y M / Delgado, C / Della Torre, S / Demirköz, M B / Derome, L / Di Falco, S / Dimiccoli, F / Díaz, C / von Doetinchem, P / Dong, F / Donnini, F / Duranti, M / D'Urso, D / Egorov, A / Eline, A / Eronen, T / Feng, J / Fiandrini, E / Finch, E / Fisher, P / Formato, V / Galaktionov, Y / Gallucci, G / García, B / García-López, R J / Gargiulo, C / Gast, H / Gebauer, I / Gervasi, M / Ghelfi, A / Giovacchini, F / Goglov, P / Gómez-Coral, D M / Gong, J / Goy, C / Grabski, V / Grandi, D / Graziani, M / Guerri, I / Guo, K H / Habiby, M / Haino, S / Han, K C / He, Z H / Heil, M / Hoffman, J / Hsieh, T H / Huang, H / Huang, Z C / Huh, C / Incagli, M / Ionica, M / Jang, W Y / Jinchi, H / Kang, S C / Kanishev, K / Kim, G N / Kim, K S / Kirn, Th / Konak, C / Kounina, O / Kounine, A / Koutsenko, V / Krafczyk, M S / La Vacca, G / Laudi, E / Laurenti, G / Lazzizzera, I / Lebedev, A / Lee, H T / Lee, S C / Leluc, C / Li, H S / Li, J Q / Li, Q / Li, T X / Li, W / Li, Z H / Li, Z Y / Lim, S / Lin, C H / Lipari, P / Lippert, T / Liu, D / Liu, Hu / Lu, S Q / Lu, Y S / Luebelsmeyer, K / Luo, F / Luo, J Z / Lv, S S / Majka, R / Mañá, C / Marín, J / Martin, T / Martínez, G / Masi, N / Maurin, D / Menchaca-Rocha, A / Meng, Q / Mo, D C / Morescalchi, L / Mott, P / Nelson, T / Ni, J Q / Nikonov, N / Nozzoli, F / Nunes, P / Oliva, A / Orcinha, M / Palmonari, F / Palomares, C / Paniccia, M / Pauluzzi, M / Pensotti, S / Pereira, R / Picot-Clemente, N / Pilo, F / Pizzolotto, C / Plyaskin, V / Pohl, M / Poireau, V / Putze, A / Quadrani, L / Qi, X M / Qin, X / Qu, Z Y / Räihä, T / Rancoita, P G / Rapin, D / Ricol, J S / Rodríguez, I / Rosier-Lees, S / Rozhkov, A / Rozza, D / Sagdeev, R / Sandweiss, J / Saouter, P / Schael, S / Schmidt, S M / Schulz von Dratzig, A / Schwering, G / Seo, E S / Shan, B S / Shi, J Y / Siedenburg, T / Son, D / Song, J W / Sun, W H / Tacconi, M / Tang, X W / Tang, Z C / Tao, L / Tescaro, D / Ting, Samuel C C / Ting, S M / Tomassetti, N / Torsti, J / Türkoğlu, C / Urban, T / Vagelli, V / Valente, E / Vannini, C / Valtonen, E / Vázquez Acosta, M / Vecchi, M / Velasco, M / Vialle, J P / Vitale, V / Vitillo, S / Wang, L Q / Wang, N H / Wang, Q L / Wang, X / Wang, X Q / Wang, Z X / Wei, C C / Weng, Z L / Whitman, K / Wienkenhöver, J / Willenbrock, M / Wu, H / Wu, X / Xia, X / Xiong, R Q / Xu, W / Yan, Q / Yang, J / Yang, M / Yang, Y / Yi, H / Yu, Y J / Yu, Z Q / Zeissler, S / Zhang, C / Zhang, J / Zhang, J H / Zhang, S D / Zhang, S W / Zhang, Z / Zheng, Z M / Zhu, Z Q / Zhuang, H L / Zhukov, V / Zichichi, A / Zimmermann, N / Zuccon, P

    Physical review letters

    2016  Volume 117, Issue 9, Page(s) 91103

    Abstract: A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49×10^{5} antiproton events and 2.42×10^{9} proton events. The ... ...

    Abstract A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49×10^{5} antiproton events and 2.42×10^{9} proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. In the absolute rigidity range ∼60 to ∼500  GV, the antiproton p[over ¯], proton p, and positron e^{+} fluxes are found to have nearly identical rigidity dependence and the electron e^{-} flux exhibits a different rigidity dependence. Below 60 GV, the (p[over ¯]/p), (p[over ¯]/e^{+}), and (p/e^{+}) flux ratios each reaches a maximum. From ∼60 to ∼500  GV, the (p[over ¯]/p), (p[over ¯]/e^{+}), and (p/e^{+}) flux ratios show no rigidity dependence. These are new observations of the properties of elementary particles in the cosmos.
    Language English
    Publishing date 2016-08-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
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    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.091103
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station.

    Aguilar, M / Ali Cavasonza, L / Ambrosi, G / Arruda, L / Attig, N / Aupetit, S / Azzarello, P / Bachlechner, A / Barao, F / Barrau, A / Barrin, L / Bartoloni, A / Basara, L / Başeğmez-du Pree, S / Battarbee, M / Battiston, R / Becker, U / Behlmann, M / Beischer, B /
    Berdugo, J / Bertucci, B / Bindel, K F / Bindi, V / Boella, G / de Boer, W / Bollweg, K / Bonnivard, V / Borgia, B / Boschini, M J / Bourquin, M / Bueno, E F / Burger, J / Cadoux, F / Cai, X D / Capell, M / Caroff, S / Casaus, J / Castellini, G / Cervelli, F / Chae, M J / Chang, Y H / Chen, A I / Chen, G M / Chen, H S / Cheng, L / Chou, H Y / Choumilov, E / Choutko, V / Chung, C H / Clark, C / Clavero, R / Coignet, G / Consolandi, C / Contin, A / Corti, C / Creus, W / Crispoltoni, M / Cui, Z / Dai, Y M / Delgado, C / Della Torre, S / Demakov, O / Demirköz, M B / Derome, L / Di Falco, S / Dimiccoli, F / Díaz, C / von Doetinchem, P / Dong, F / Donnini, F / Duranti, M / D'Urso, D / Egorov, A / Eline, A / Eronen, T / Feng, J / Fiandrini, E / Finch, E / Fisher, P / Formato, V / Galaktionov, Y / Gallucci, G / García, B / García-López, R J / Gargiulo, C / Gast, H / Gebauer, I / Gervasi, M / Ghelfi, A / Giovacchini, F / Goglov, P / Gómez-Coral, D M / Gong, J / Goy, C / Grabski, V / Grandi, D / Graziani, M / Guo, K H / Haino, S / Han, K C / He, Z H / Heil, M / Hoffman, J / Hsieh, T H / Huang, H / Huang, Z C / Huh, C / Incagli, M / Ionica, M / Jang, W Y / Jinchi, H / Kang, S C / Kanishev, K / Kim, G N / Kim, K S / Kirn, Th / Konak, C / Kounina, O / Kounine, A / Koutsenko, V / Krafczyk, M S / La Vacca, G / Laudi, E / Laurenti, G / Lazzizzera, I / Lebedev, A / Lee, H T / Lee, S C / Leluc, C / Li, H S / Li, J Q / Li, Q / Li, T X / Li, W / Li, Y / Li, Z H / Li, Z Y / Lim, S / Lin, C H / Lipari, P / Lippert, T / Liu, D / Liu, Hu / Lordello, V D / Lu, S Q / Lu, Y S / Luebelsmeyer, K / Luo, F / Luo, J Z / Lv, S S / Machate, F / Majka, R / Mañá, C / Marín, J / Martin, T / Martínez, G / Masi, N / Maurin, D / Menchaca-Rocha, A / Meng, Q / Mikuni, V M / Mo, D C / Morescalchi, L / Mott, P / Nelson, T / Ni, J Q / Nikonov, N / Nozzoli, F / Oliva, A / Orcinha, M / Palmonari, F / Palomares, C / Paniccia, M / Pauluzzi, M / Pensotti, S / Pereira, R / Picot-Clemente, N / Pilo, F / Pizzolotto, C / Plyaskin, V / Pohl, M / Poireau, V / Putze, A / Quadrani, L / Qi, X M / Qin, X / Qu, Z Y / Räihä, T / Rancoita, P G / Rapin, D / Ricol, J S / Rosier-Lees, S / Rozhkov, A / Rozza, D / Sagdeev, R / Sandweiss, J / Saouter, P / Schael, S / Schmidt, S M / Schulz von Dratzig, A / Schwering, G / Seo, E S / Shan, B S / Shi, J Y / Siedenburg, T / Son, D / Song, J W / Sun, W H / Tacconi, M / Tang, X W / Tang, Z C / Tao, L / Tescaro, D / Ting, Samuel C C / Ting, S M / Tomassetti, N / Torsti, J / Türkoğlu, C / Urban, T / Vagelli, V / Valente, E / Vannini, C / Valtonen, E / Vázquez Acosta, M / Vecchi, M / Velasco, M / Vialle, J P / Vitale, V / Vitillo, S / Wang, L Q / Wang, N H / Wang, Q L / Wang, X / Wang, X Q / Wang, Z X / Wei, C C / Weng, Z L / Whitman, K / Wienkenhöver, J / Wu, H / Wu, X / Xia, X / Xiong, R Q / Xu, W / Yan, Q / Yang, J / Yang, M / Yang, Y / Yi, H / Yu, Y J / Yu, Z Q / Zeissler, S / Zhang, C / Zhang, J / Zhang, J H / Zhang, S D / Zhang, S W / Zhang, Z / Zheng, Z M / Zhu, Z Q / Zhuang, H L / Zhukov, V / Zichichi, A / Zimmermann, N / Zuccon, P

    Physical review letters

    2016  Volume 117, Issue 23, Page(s) 231102

    Abstract: Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon ... ...

    Abstract Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law R^{Δ} with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.
    Language English
    Publishing date 2016-12-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.231102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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