Observations of high-energy electrons with the bets intrument and the future prospects

Shoji Torii, T. Tamura, N. Tateyama, K. Yoshida, T. Ouchi, J. Nishimura, T. Yamagami, Y. Saito, H. Murakami, T. Kobayashi, Y. Komori, K. Kasahara, T. Yuda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have developed the balloon-borne electron telescope with scintillating fibers (BETS) for the observation of cosmic-ray electrons in 10 -100 GeV. The detector is an imaging calorimeter consisting of the scintillating-fiber belts of 36 layers (each 280 mm wide) and the 8 plates of lead (each 5mm thick). The rejection of the background protons was performed with an efficiency of ~2000 using the shower imaging capability with high granulation. The balloon observations were carried out in 1997 and in 1998 at Sanriku Balloon Center (ISAS) in Japan. The observed electron flux is consistent around a few 10 GeV with the recent results reported by the HEAT group. Comparing the flux with theoretical expectations by a diffusion model, the best fit is obtained for the model of a diffusion coefficient of 2 × 1028(E/GeV)0.3 cm2/sec in the SN rate of once per 30 years in the Galaxy. In January, 2003, a newly-developed scintillating fiber detector will be borne on the Polar Patrol Balloon (PPB) in Antarctica and exposed for 30 days to the cosmic radiations. We can increase the statistics of electron number in 10-1000 GeV by 10 times comparing to the present data.

Original languageEnglish
Pages (from-to)1273-1282
Number of pages10
JournalAdvances in Space Research
Volume30
Issue number5
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Balloons
future prospect
balloons
scintillating fibers
high energy electrons
electron
Electrons
Cosmic rays
energy
Fibers
cosmic rays
particle telescopes
balloon observation
patrols
Fluxes
Detectors
Imaging techniques
Galaxies
Granulation
electron flux

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Torii, S., Tamura, T., Tateyama, N., Yoshida, K., Ouchi, T., Nishimura, J., ... Yuda, T. (2002). Observations of high-energy electrons with the bets intrument and the future prospects. Advances in Space Research, 30(5), 1273-1282. https://doi.org/10.1016/S0273-1177(02)00543-4

Observations of high-energy electrons with the bets intrument and the future prospects. / Torii, Shoji; Tamura, T.; Tateyama, N.; Yoshida, K.; Ouchi, T.; Nishimura, J.; Yamagami, T.; Saito, Y.; Murakami, H.; Kobayashi, T.; Komori, Y.; Kasahara, K.; Yuda, T.

In: Advances in Space Research, Vol. 30, No. 5, 2002, p. 1273-1282.

Research output: Contribution to journalArticle

Torii, S, Tamura, T, Tateyama, N, Yoshida, K, Ouchi, T, Nishimura, J, Yamagami, T, Saito, Y, Murakami, H, Kobayashi, T, Komori, Y, Kasahara, K & Yuda, T 2002, 'Observations of high-energy electrons with the bets intrument and the future prospects', Advances in Space Research, vol. 30, no. 5, pp. 1273-1282. https://doi.org/10.1016/S0273-1177(02)00543-4
Torii, Shoji ; Tamura, T. ; Tateyama, N. ; Yoshida, K. ; Ouchi, T. ; Nishimura, J. ; Yamagami, T. ; Saito, Y. ; Murakami, H. ; Kobayashi, T. ; Komori, Y. ; Kasahara, K. ; Yuda, T. / Observations of high-energy electrons with the bets intrument and the future prospects. In: Advances in Space Research. 2002 ; Vol. 30, No. 5. pp. 1273-1282.
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