CALET investigation of the origin of cosmic-ray electrons and search for dark matter
Abstract
The CALorimetric Electron Telescope, CALET, is a new all-sky gamma-ray and electron obser-vatory being developed for the Exposure Facility of Japanese Experiment Module (JEM-EF) on the International Space Station (ISS). The main instrument consists of an imaging calorimeter of scintillating fibers, IMC, a total absorption calorimeter of BGO, TASC, and silicon pixel ar-ray, SIA. CALET has a unique capability to observe high-energy electrons in 1GeV -10TeV and gamma rays in 10GeV -several TeV with an energy resolution better than a few percent above 100 GeV, an angular resolution of 0.1deg above 100GeV, and a hadron rejection power larger than 105 . The high precise measurements of electron energy spectrum and arrival directions enable us to detect distinctive features from nearby cosmic-ray electron sources and WIMP dark matter. Excellent energy resolution of CALET, which is much better than Fermi-LAT or air Cherenkov telescopes, is also ideal to detect gamma-ray lines in the GeV-TeV region from WIMP dark matter. In this paper, we present scientific prospects of CALET for investigation of the origin of cosmic-ray electrons and dark matter search.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.2700Y