CALET Results after Three Years on Orbit on the International Space Station

P. Maestro, Università degli Studi di Siena
O. Adriani, Università degli Studi di Firenze
Y. Akaike, NASA Goddard Space Flight Center
Y. Asaoka, Waseda University
E. Berti, Università degli Studi di Firenze
G. Bigongiari, Università degli Studi di Siena
M. Bongi, Università degli Studi di Firenze
P. Brogi, Università degli Studi di Siena
A. Bruno, NASA Goddard Space Flight Center
N. Cannady, NASA Goddard Space Flight Center
C. Checchia, Università degli Studi di Firenze
M. L. Cherry, Louisiana State University
G. Collazuol, Università degli Studi di Padova
T. G. Guzik, Louisiana State University
M. Ichimura, Hirosaki University
M. H. Israel, Washington University in St. Louis
K. Kasahara, Shibaura Institute of Technology
Y. Kawakubo, Louisiana State University
J. F. Krizmanic, NASA Goddard Space Flight Center
P. S. Marrocchesi, Università degli Studi di Siena
A. M. Messineo, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
J. W. Mitchell, NASA Goddard Space Flight Center
S. Miyake, National Institute of Technology, Ibaraki College
M. Mori, Ritsumeikan University Biwako-Kusatsu Campus
N. Mori, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
H. M. Motz, Waseda University
K. Munakata, Shinshu University
L. Pacini, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
F. Palma, Università degli Studi di Roma "Tor Vergata"
P. Papini, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
B. F. Rauch, Washington University in St. Louis
S. B. Ricciarini, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
T. Sakamoto, Aoyama Gakuin University

Abstract

The CALorimetric Electron Telescope (CALET) is an astroparticle physics experiment installed on the International Space Station since August 2015. The CALET mission was conceived to address several outstanding questions of high-energy astroparticle physics, like indirect detection of dark matter, the origin of cosmic rays (CRs), their mechanisms of acceleration and galactic propagation, the presence of possible nearby astrophysical CR sources. That can be achieved by precise measurements of the fluxes of CR electrons and γ rays up to the unexplored region above 1 TeV, and the energy spectra and composition of CR nuclei from a few tens of GeV to hundreds of TeV. In order to perform these observations, the instrument combines a thick total absorption PWO crystal calorimeter for energy measurement, a scintillator hodoscope for charge identification and thin imaging tungsten-scintillating fiber calorimeter providing accurate particle tracking and complementary charge measurement. In this paper, we will present an overview of the main CALET results based on the data collected in the first three years of the mission.