First Detection in Space of 3 TeV Cosmic Ray Electrons in a High-Precision Measurement

The research group led by Professor Shoji Torii, Principal Investigator of the CALET mission, including Research Scientist Dr. Yoichi Asaoka, JAXA and international collaborators from Italy and the United States successfully carried out the high-precision measurement of cosmic-ray electron spectrum well into the TeV region, up to 3 TeV, that has been historically difficult to achieve with a direct measurement experiment, by using the CALorimetric Electron Telescope (CALET) on the Japanese Experimental Module – Exposed Facility on the International Space Station (ISS).

The CALET electron spectrum result is to be published in Physical Review Letters on November 1, 2017.