CALET observations of galactic electrons in the heliosphere

Y. Komori, S. Torii, T. Tamura, K. Yoshida, J. Nishimura, T. Terasawa, H. Fuke, K. Hibino, M. Ichimura, K. Kasahara, K. Kashiwagi, Y. Katayose, H. Kitamura, T. Kobayashi, S. Kuramata, F. Makino, K. Mizutani, H. Murakami, S. Okuno, Y. SaitoM. Shibata, M. Takayanagi, N. Tateyama, H. Tomida, Y. Uchihori, S. Ueno, T. Yamagami, T. Yuda

Research output: Contribution to conferencePaperpeer-review

3 Citations (Scopus)


The CALorimetric Electron Telescope(CALET) mission is proposed to measure galactic electrons and gamma rays on ISS/JEM for three years[1]. In this paper we report the purpose of this project in solar physics and the expected results from precise measurement of electron energy spectrum in the 1-100GeV energy range. The CALET measurement of long-term variations of the energy spectrum will produce a wealth of data to investigate electron propagation in the heliosphere. CALET does not distinguish positive charge from negative one. However, we can evaluate the charge sign dependence of solar modulation using correlation with the neutron monitors, since most particles are negative electrons in this energy range. Further we estimate transport parameters, mainly the energy dependence of diffusion coefficient in the heliosphere. CALET will also have a capability of measuring the short-term variation of around ten Forbush decreases(Fds) for three years. Precise measurements of the energy spectral variation of Fds will give a conclusion of the energy dependence of Fds.

Original languageEnglish
Number of pages4
Publication statusPublished - 2005 Jan 1
Event29th International Cosmic Ray Conference, ICRC 2005 - Pune, India
Duration: 2005 Aug 32005 Aug 10


Conference29th International Cosmic Ray Conference, ICRC 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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