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

Authors
Sanuki, T Motoki, M Matsumoto, H Seo, ES Wang, JZ Abe, K Anraku, K Asaoka, Y Fujikawa, M Imori, M Maeno, T Makida, Y Matsui, N Matsunaga, H Mitchell, J Mitsui, T Moiseev, A Nishimura, J Nozaki, M Orito, S Ormes, J Saeki, T Sasaki, M Shikaze, Y Sonoda, T Streitmatter, R Suzuki, J Tanaka, K Ueda, I Yajima, N Yamagami, T Yamamoto, A Yoshida, T Yoshimura, K
Citation
T. Sanuki et al., Precise measurement of cosmic-ray proton and helium spectra with the BESS spectrometer, ASTROPHYS J, 545(2), 2000, pp. 1135-1142
Citations number
37
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
545
Issue
2
Year of publication
2000
Part
1
Pages
1135 - 1142
Database
ISI
SICI code
0004-637X(200012)545:2<1135:PMOCPA>2.0.ZU;2-Y
Abstract
We report cosmic-ray proton and helium spectra in energy ranges of 1-120 Ge V 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 h ighly precise measurement of the circular track in a uniform solenoidal mag netic field of 1 T. Those spectra were determined within overall uncertaint ies of +/-5% for protons and +/- 10% for helium nuclei including statistica l and systematic errors.