Study of >100 GeV electrons with BETS detector using a long duration balloon flight in Antarctica

Shoji Torii, K. Yoshida*, T. Tamura, H. Kitamura, T. Yamagami, N. Tateyama, K. Anraku, T. Yamashita, J. Chang, J. Nishimura, Y. Saito, S. Ohta, M. Namiki, Y. Matsuzaka, I. Iijima, H. Yamagishi, A. Kadokura, K. Kasahara, S. Ogawa, M. FujiiY. Tasaki, H. Kaiho, M. Shibata, Y. Katayose, T. Inoue, K. Mizutani, Y. Hirai, H. Murakami, T. Kobayashi, Y. Komori, T. Yuda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We have observed cosmic-ray electrons from 10 to 1000 GeV by a long duration balloon flight using Polar Patrol Balloon (PPB) in Antarctica. The observation was carried out for 13 days at an altitude of 35 km in January 2004. The detector is an imaging calorimeter composed of scintillating-fiber belts and plastic scintillators inserted between lead plates. The geometrical factor of detector is about 600 cm2sr and the total thickness of lead absorber is 9 radiation lengths. The performance of the detector has been confirmed by the CERN-SPS beam test and also investigated by Monte-Carlo simulations. New telemetry system using a commercial satellite of iridium, power supply by solar batteries, and automatic level control using CPU have successfully been developed and operated during the flight. We have collected 5.7 × 103 events over 100 GeV including nearly 100 candidates of primary electrons.

Original languageEnglish
Pages (from-to)2095-2102
Number of pages8
JournalAdvances in Space Research
Issue number11
Publication statusPublished - 2006
Externally publishedYes


  • Cosmic-ray electrons
  • Cosmic-ray origin
  • Long duration balloons

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics


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