Spectra of Galactic Cosmic Rays (GCRs) measured at the Earth are the combination of several processes: sources production and acceleration, propagation in the interstellar medium and propagation in the heliosphere. Inside the solar cavity the intensity of GCRs is reduced due to the solar modulation, the interaction which they have with the interplanetary medium. We realized a 2D stochastic simulation of solar modulation to reproduce CR spectra at the Earth, and evaluated the importance in our results of the Local Interstellar Spectrum (LIS) model and its agreement with data at high energy. We show a good agreement between our model and the data taken by AMS-01 and BESS experiments during periods with different solar activity conditions. Furthermore we made a prediction for the differential intensity which will be measured by AMS-02 experiment.
Bobik, P., Boella, G., Boschini, M., Consolandi, C., Della Torre, S., Gervasi, M., et al. (2011). Proton modulation in the Heliosphere for different solar conditions and prediction for AMS-02. In Proceedings of the 12th ICATPP Conference "Cosmic Rays for Particle and Astroparticle Physics" (Villa Olmo, Como, Italy, 7-8 October) (pp.352-359). World Scientific Pub Co Inc [10.1142/9789814329033_0045].
Proton modulation in the Heliosphere for different solar conditions and prediction for AMS-02
BOELLA, GIULIANO FILIPPO;CONSOLANDI, CRISTINA;GERVASI, MASSIMO;Grandi, D;PENSOTTI, SIMONETTA;TACCONI, MAURO
2011
Abstract
Spectra of Galactic Cosmic Rays (GCRs) measured at the Earth are the combination of several processes: sources production and acceleration, propagation in the interstellar medium and propagation in the heliosphere. Inside the solar cavity the intensity of GCRs is reduced due to the solar modulation, the interaction which they have with the interplanetary medium. We realized a 2D stochastic simulation of solar modulation to reproduce CR spectra at the Earth, and evaluated the importance in our results of the Local Interstellar Spectrum (LIS) model and its agreement with data at high energy. We show a good agreement between our model and the data taken by AMS-01 and BESS experiments during periods with different solar activity conditions. Furthermore we made a prediction for the differential intensity which will be measured by AMS-02 experiment.
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