CALET measurements of cosmic ray electrons in the heliosphere
Abstract
We have proposed the CALET(CALorimetric Electron Telescope) mission to observe galactic electrons and gamma rays on ISS/JEM. In this paper we present the measurements of long-term and short-term variations of electron intensities in the helisphere. Galactic electrons of 1-100GeV energy range mostly have negative charges and the spectrum largely varies with solar activities. Thus we expect the knowledge about the diffusion coefficient of cosmic rays and analyses with the neutron monitor data will inspect the effectiveness of modulation models or the charge sign dependence of modulation. We also schedule the measurements of Forbush decreases(Fds). The large geometric factor for CALET can compensate the low intensity of electrons and will make the first detection by negative particles. The ISS orbit severely restrict lower energy measurements, so that we estimate in detail the variation of geomagnetic cut-off rigidity.
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- 2008
- Bibcode:
- 2008ICRC....1..441K