EPJ Web Conf.
Volume 209, 2019RICAP18, 7th Roma International Conference on Astroparticle Physics
|Number of page(s)||4|
|Published online||13 May 2019|
Time dependence of the helium flux measured by PAMELA
1 INFN, Sezione di Rome “Tor Vergata”, I-00133 Rome, Italy
2 University of Florence, Department of Physics, I-50019 Sesto Fiorentino, Florence, Italy
3 INFN, Sezione di Florence, I-50019 Sesto Fiorentino, Florence, Italy
4 University of Naples “Federico II”, Department of Physics, I-80126 Naples, Italy
5 INFN,Sezione di Naples, I-80126 Naples, Italy
6 Lebedev Physical Institute, RU-119991, Moscow, Russia
7 University of Bari, Department of Physics, I-70126 Bari, Italy
8 INFN, Sezione di Bari, I-70126 Bari, Italy
9 INFN, Sezione di Trieste, I-34149 Trieste, Italy
10 Ioffe Physical Technical Institute, RU-194021 St. Petersburg, Russia
11 KTH, Department of Physics, and the Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, SE-10691 Stockholm, Sweden
12 RIKEN, EUSO team Global Research Cluster, Wako-shi, Saitama, Japan
13 IFAC, I-50019 Sesto Fiorentino, Florence, Italy
14 Space Science Data Center - Agenzia Spaziale Italiana, via del Politecnico, s.n.c., I-00133, Roma, Italy
15 National Research Nuclear University MEPhI, RU-115409, Moscow, Russia
16 INFN, Laboratori Nazionali di Frascati, Via Enrico Fermi 40, I-00044 Frascati, Italy
17 Universitat Siegen, Department of Physics, D-57068 Siegen, Germany
18 Istituto Nazionale di Astrofisica, Fosso del cavaliere 100, 00133 Roma, Italy
19 University of Udine, Department of Mathematics, Computer Science and Physics Via delle Scienze, 206, Udine, Italy
20 University of Rome “Tor Vergata”, Department of Physics, I-00133 Rome, Italy
21 North-West University, Centre for Space Research, 2520 Potchefstroom, South Africa
a e-mail: firstname.lastname@example.org
Published online: 13 May 2019
Precision measurements of the Z = 2 component in cosmic radiation provide crucial information about the origin and propagation of the second most abundant cosmic ray species in the Galaxy (9% of the total). These measurements, acquired with the PAMELA space experiment orbiting Earth, allow to study solar modulation in details. Helium modulation is compared to the modulation of protons to study possible dependencies on charge and mass. The time dependence of helium fluxes on a monthly basis measured by PAMELA has been studied for the period between July 2006 to January 2016 in the energy range from 800 MeV/n to ~ 20 GeV/n.
© The Authors, published by EDP Sciences, 2019
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