Precise measurement of cosmic-ray proton and helium spectra with the BEES spectrometer

T. Sanuki*, M. Motoki, H. Matsumoto, E. S. Seo, J. Z. Wang, K. Abe, K. Anraku, Y. Asaoka, M. Fujikawa, M. Imori, T. Maeno, Y. Makida, N. Matsui, H. Matsunaga, J. Mitchell, T. Mitsui, A. Moiseev, J. Nishimura, M. Nozaki, S. OritoJ. Ormes, T. Saeki, M. Sasaki, Y. Shikaze, T. Sonoda, R. Streitmatter, J. Suzuki, K. Tanaka, I. Ueda, N. Yajima, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

300 Citations (Scopus)

Abstract

We report cosmic-ray proton and helium spectra in energy ranges of 1-120 GeV nucleon-1 and 1-54 GeV nucleon-1, respectively, measured by a flight of the Balloon-borne Experiment with Superconducting Spectrometer (BESS) in 1998. The magnetic rigidity of the cosmic ray was reliably determined by highly precise measurement of the circular track in a uniform solenoidal magnetic field of 1 T. Those spectra were determined within overall uncertainties of ±5% for protons and ±10% for helium nuclei including statistical and systematic errors.

Original languageEnglish
Pages (from-to)1135-1142
Number of pages8
JournalAstrophysical Journal
Volume545
Issue number2 PART 1
DOIs
Publication statusPublished - 2000 Dec 20
Externally publishedYes

Keywords

  • Cosmic rays
  • Elementary particles

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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