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1. Solar modulation of galactic cosmic rays with the ARINA and PAMELA spectrometers

Author

V. V. Mikhailov, M. A. Bzheumikhova, D. S. Losev, A. V. Sidorov, S. V. Koldashov, A. G. Mayorov, and A. A. Ulitin

Subjects
Physics, Scintillation, Proton, Spectrometer, Astrophysics::High Energy Astrophysical Phenomena, Hadron, General Physics and Astronomy, Astronomy, Cosmic ray, Astrophysics, Proton flux, Modulation, Physics::Space Physics, Nuclear Experiment, Interplanetary spaceflight
Abstract

Solar modulation of the proton flux in Galactic space radiation during the period from the end of the 23rd to the beginning of 24th cycle of solar activity is investigated using data from the PAMELA magnetic spectrometer and ARINA scintillation spectrometer. The time dependence of proton intensity is plotted, and shows typical features in a form of rises and falls against a main trend. In order to explain these, the correlation between variations in the Galactic proton flux and solar/interplanetary parameters is investigated.

Published
2013
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2. Study of solar modulation of galactic cosmic rays with the PAMELA and ARINA spectrometers in 2006-2012

Author

S. Bottai, E. Mocchiutti, P. Spillantini, M. Simon, A. A. Leonov, Alfonso Monaco, S. V. Koldashov, C. Pizzolotto, V. Bonvicini, Y. I. Stozhkov, S. Y. Krutkov, Giovanna Jerse, V. G. Zverev, V. V. Mikhailov, V. V. Malakhov, Maria Teresa Ricci, Per Carlson, P. Picozza, V. Di Felice, Roberta Sparvoli, R. Carbone, Lorenzo Bonechi, Ritabrata Sarkar, S. V. Borisov, Sergey Koldobskiy, G. C. Barbarino, F. Cafagna, Y. T. Yurkin, Mark Pearce, S. B. Ricciarini, N. Zampa, G. A. Bazilevskaya, A. A. Ulitin, A. V. Karelin, P. Papini, E. Vannuccini, D. Campana, N. De Simone, Marco Casolino, D. S. Losev, G. Osteria, G. Castellini, Roberto Bellotti, M. P. De Pascale, A. N. Kvashnin, A. V. Sidorov, S. A. Voronov, E. A. Bogomolov, Laura Rossetto, L. Consiglio, G. Zampa, O. Adriani, W. Menn, M. Bongi, William Gillard, L. Marcelli, Juan Wu, A. Vacchi, A. Bruno, C. De Santis, A. M. Galper, A. G. Mayorov, N. N. Nikonov, Nicola Mori, M. A. Bzheumikhova, G. I. Vasilyev, F. Palma, Mirko Boezio, M. A., Bzheumikhova, O., Adriani, Barbarino, Giancarlo, G. A., Bazilevskaya, R., Bellotti, M., Boezio, E. A., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S., Borisov, S., Bottai, A., Bruno, F., Cafagna, D., Campana, R., Carbone, P., Carlson, M., Casolino, G., Castellini, Consiglio, Lucia, M. P., De Pascale, C., De Santi, N., De Simone, V., Di Felice, A. M., Galper, W., Gillard, G., Jerse, A. V., Karelin, S. V., Koldashov, S. A., Koldobskiy, S. Y., Krutkov, A. N., Kvashnin, A., Leonov, D. S., Losev, V., Malakhov, L., Marcelli, A. G., Mayorov, W., Menn, V. V., Mikhailov, E., Mocchiutti, A., Monaco, N., Mori, N., Nikonov, Osteria, Giuseppe, F., Palma, P., Papini, M., Pearce, P., Picozza, C., Pizzolotto, M., Ricci, S. B., Ricciarini, R., Sarkar, A. V., Sidorov, L., Rossetto, M., Simon, R., Sparvoli, P., Spillantini, Y. I., Stozhkov, A. A., Ulitin, A., Vacchi, E., Vannuccini, G., Vasilyev, S. A., Voronov, J., Wu, Y. T., Yurkin, G., Zampa, N., Zampa, and V. G., Zverev

Subjects
Physics, History, PAMELA detector, Astrophysics::High Energy Astrophysical Phenomena, Flux, Astronomy, Cosmic ray, Astrophysics, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, Solar cycle, law.invention, Physics and Astronomy (all), Solar wind, law, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Forbush decrease, Astrophysics::Earth and Planetary Astrophysics, Heliospheric current sheet, Interplanetary magnetic field
Abstract

Spectrometers PAMELA and ARINA, mounted on the spacecraft Resurs-DK1, carried out precision measurements of galactic cosmic ray (GCR) flux near the Earth from 2006 to present. Combining these instruments gives the possibility to study the effect of solar modulation in the energy range from 30 MeV to dozens of GeV. This report presents experimental results concerning the time interval from the end of the 23rd solar cycle (noted by an prolonged minimum) to the beginning of the 24th cycle. The cosmic ray flux raised up to the end of 2009, then it began to decline, which is in coincidence with the sunspot number and evidence of the solar activity increasing. Some additional features were noted in the time profile of galactic cosmic ray flux, which, as shown by analysis of the correlation, correspond to a change of such heliospheric parameters as the tilt angle of the heliospheric current sheet (HCS), the solar wind velocity and the intensity of interplanetary magnetic field (IMF).

Published
2013
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