Simulated Performance of the CALorimetric Electron Telescope (CALET) experiment
Abstract
CALET is a detector planned to be on board the Japanese Experiment Module Exposed Facility(JEM-EF) of the International Space Station. The CALET mission aims at revealing unresolved problems in high energy phenomena of the Universe by carrying out a precise measurement of high energy gamma-rays in 20 MeV - TeV, electrons in 1 GeV - 20 TeV and hadronic cosmic rays in 10 GeV - 1000 TeV. It is now in a phase A study of the JAXA program. Main detector is composed of an IMaging Calorimeter (IMC), a Total AbSorption Calorimeter (TASC), SIlicon Array (SIA) and Scintillator Anti-Coincidence System (SACS) to observe various kind of particles in very wide energy range. The total absorber thickness is 31 r.l. for electromagnetic particles and 1.6 m.f.p. for protons. Monte Carlo simulation study has being carried out for optimization of the detector performance in observing each kind of particles. We use the EPICS, Electron-Photon Induced Cascade Simulator in a detector, code in which dpmjet3 is adopted as nuclear interaction model. We obtained following performance about the observation of very high energy (< 100 GeV) electrons, which is a main target of the CALET experiment: 1) Proton contamination in the observed electrons is less than 2 % without serious electron loss. 2) Energy resolution is better than a few %. 3) Angular resolution is better than 1 deg. 4) Effective geometrical factor is about 7000 cm2 sr. We will also present the simulated performance of the CALET experiment in observing other particles.
- Publication:
-
37th COSPAR Scientific Assembly
- Pub Date:
- 2008
- Bibcode:
- 2008cosp...37...43A