Speaker
Dr
Yoichi Asaoka
(WISE, Waseda University)
Description
The CALET (CALorimetric Electron Telescope) space experiment, which is currently conducting direct cosmic-ray observations onboard the International Space Station (ISS), uses an all-calorimetric instrument with total vertical thickness of 30 radiation lengths and fine imaging capability. The instrument is optimized for cosmic-ray electron measurements by achieving large proton rejection and excellent energy resolution well into the TeV energy region. In addition, very wide dynamic range of energy measurements and absolute charge identification capability of the instrument enable us to measure proton and nuclei spectra as well as electron and gamma-ray spectra. The CALET mission goals include the investigation of acceleration and propagation of galactic cosmic rays, of possible nearby sources, and of potential signature of dark matter. During a mission life of five years (or more), the CALET experiment will be measuring the flux of cosmic-ray electrons (including positrons) to 20 TeV, gamma-rays to 10 TeV and nuclei with Z=1 to 40 up to 1,000 TeV for the more abundant elements. Since the start of observation in October 2015, smooth and contiunous operations have taken place. In this contribution, we will give a brief summary of the CALET observation: 1) electron energy spectrum, 2) proton and nuclei spectrum, 3) gamma-ray observation including transient search.
Primary author
Dr
Yoichi Asaoka
(WISE, Waseda University)
