Time dependence of the helium flux measured by PAMELA

N. Marcelli; O. Adriani; G. C. Barbarino; G. A. Bazilevskaya; R. Bellotti; M. Boezio; E. A. Bogomolov; M. Bongi; V. Bonvicini; S. Bottai; A. Bruno; F. Cafagna; D. Campana; P. Carlson; M. Casolino; G. Castellini; C. De Santis; V. Di Felice; A. M. Galper; A.V. Karelin; S. V. Koldashov; S. Koldobskiy; S. Y. Krutkov; A. N. Kvashnin; A. Leonov; V. Malakhov; L. Marcelli; M. Martucci; A. G. Mayorov; W. Menn; M. Mergè; V. V. Mikhailov; E. Mocchiutti; A. Monaco; N. Mori; R. Munini; G. Osteria; B. Panico; P. Papini; M. Pearce; P. Picozza; M. Ricci; S. B. Ricciarini; M. Simon; R. Sparvoli; P. Spillantini; Y. I. Stozhkov; A. Vacchi; E. Vannuccini; G. Vasilyev; S. A. Voronov; Y. T. Yurkin; G. Zampa; N. Zampa; M. S. Potgieter; O. P. M. Aslam; D. Bisschoff

doi:10.1051/epjconf/201920901004

All issues

Volume 209 (2019)

EPJ Web Conf., 209 (2019) 01004

Abstract

Open Access

Issue		EPJ Web Conf. Volume 209, 2019 RICAP18, 7^th Roma International Conference on Astroparticle Physics


Article Number		01004
Number of page(s)		4
DOI		https://doi.org/10.1051/epjconf/201920901004
Published online		13 May 2019

EPJ Web of Conferences 209, 01004 (2019)
https://doi.org/10.1051/epjconf/201920901004

Time dependence of the helium flux measured by PAMELA

N. Marcelli¹^,20^a, O. Adriani²^,3, G. C. Barbarino⁴^,5, G. A. Bazilevskaya⁶, R. Bellotti⁷^,8, M. Boezio⁹, E. A. Bogomolov¹⁰, M. Bongi²^,3, V. Bonvicini⁹, S. Bottai³, A. Bruno⁸, F. Cafagna⁷^,8, D. Campana⁵, P. Carlson¹¹, M. Casolino¹^,12, G. Castellini¹³, C. De Santis¹, V. Di Felice¹^,14, A. M. Galper¹⁵, A.V. Karelin¹⁵, S. V. Koldashov¹⁵, S. Koldobskiy¹⁵, S. Y. Krutkov¹⁰, A. N. Kvashnin⁶, A. Leonov¹⁵, V. Malakhov¹⁵, L. Marcelli¹, M. Martucci¹^,20, A. G. Mayorov¹⁵, W. Menn¹⁷, M. Mergè¹^,20, V. V. Mikhailov¹⁵, E. Mocchiutti⁹, A. Monaco⁷^,8, N. Mori³, R. Munini⁹, G. Osteria⁵, B. Panico⁵, P. Papini³, M. Pearce¹¹, P. Picozza¹^,20, M. Ricci¹⁶, S. B. Ricciarini¹³, M. Simon¹⁷, R. Sparvoli¹^,20, P. Spillantini²^,3, Y. I. Stozhkov⁶, A. Vacchi⁹^,19, E. Vannuccini³, G. Vasilyev¹⁰, S. A. Voronov¹⁵, Y. T. Yurkin¹⁵, G. Zampa⁹, N. Zampa⁹, M. S. Potgieter²¹, O. P. M. Aslam²¹ and D. Bisschoff²¹

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: nadir.marcelli@roma2.infn.it

Published online: 13 May 2019

Abstract

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.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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