BESS-polar measurements of the cosmic-ray proton and helium spectra

K. Sakai, K. Abe, H. Fuke, S. Haino, T. Hams, M. Hasegawa, A. Horikoshi, A. Itazaki, K. C. Kim, T. Kumazawa, A. Kusumoto, M. H. Lee, Y. Makida, S. Matsuda, Y. Matsukawa, K. Matsumoto, J. W. Mitchell, Z. Myers, J. Nishimura, M. NozakiR. Orito, J. F. Ormes, N. Picot-Clemente, M. Sasaki, E. S. Seo, Y. Shikaze, R. Shinoda, R. E. Streitmatter, J. Suzuki, Y. Takasugi, K. Takeuchi, K. Tanaka, N. Thakur, T. Yamagami, A. Yamamoto, T. Yoshida, Koji Yoshimura

Research output: Contribution to journalArticle

Abstract

The energy spectra of cosmic-ray protons and helium near solar minimum were measured with BESS-Polar (Balloon-borne Experiment with a Superconducting Spectrometer-Polar) during long-duration flights over Antarctica in December 2004 and December 2007, and are discussed here. The absolute fluxes and spectral shapes of primary protons and helium probe the origin and the propagation history of cosmic rays in the Galaxy. The spectra are also essential as inputs to calculate the spectrum of cosmic-ray antiprotons, which are secondary products of cosmic-ray interactions with the interstellar gas. We report absolute spectra at the top of the atmosphere for cosmic-ray protons in the kinetic energy range 0.2-160 GeV and helium nuclei 0.2-80 GeV/nucleon [1].

Original languageEnglish
Article number436
JournalProceedings of Science
Volume30-July-2015
Publication statusPublished - 2015

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BESS (satellite)
cosmic rays
helium
protons
interstellar gas
Antarctic regions
balloons
antiprotons
energy spectra
kinetic energy
histories
flight
spectrometers
galaxies
atmospheres
nuclei
propagation
probes
products

ASJC Scopus subject areas

  • General

Cite this

Sakai, K., Abe, K., Fuke, H., Haino, S., Hams, T., Hasegawa, M., ... Yoshimura, K. (2015). BESS-polar measurements of the cosmic-ray proton and helium spectra. Proceedings of Science, 30-July-2015, [436].

BESS-polar measurements of the cosmic-ray proton and helium spectra. / Sakai, K.; Abe, K.; Fuke, H.; Haino, S.; Hams, T.; Hasegawa, M.; Horikoshi, A.; Itazaki, A.; Kim, K. C.; Kumazawa, T.; Kusumoto, A.; Lee, M. H.; Makida, Y.; Matsuda, S.; Matsukawa, Y.; Matsumoto, K.; Mitchell, J. W.; Myers, Z.; Nishimura, J.; Nozaki, M.; Orito, R.; Ormes, J. F.; Picot-Clemente, N.; Sasaki, M.; Seo, E. S.; Shikaze, Y.; Shinoda, R.; Streitmatter, R. E.; Suzuki, J.; Takasugi, Y.; Takeuchi, K.; Tanaka, K.; Thakur, N.; Yamagami, T.; Yamamoto, A.; Yoshida, T.; Yoshimura, Koji.

In: Proceedings of Science, Vol. 30-July-2015, 436, 2015.

Research output: Contribution to journalArticle

Sakai, K, Abe, K, Fuke, H, Haino, S, Hams, T, Hasegawa, M, Horikoshi, A, Itazaki, A, Kim, KC, Kumazawa, T, Kusumoto, A, Lee, MH, Makida, Y, Matsuda, S, Matsukawa, Y, Matsumoto, K, Mitchell, JW, Myers, Z, Nishimura, J, Nozaki, M, Orito, R, Ormes, JF, Picot-Clemente, N, Sasaki, M, Seo, ES, Shikaze, Y, Shinoda, R, Streitmatter, RE, Suzuki, J, Takasugi, Y, Takeuchi, K, Tanaka, K, Thakur, N, Yamagami, T, Yamamoto, A, Yoshida, T & Yoshimura, K 2015, 'BESS-polar measurements of the cosmic-ray proton and helium spectra', Proceedings of Science, vol. 30-July-2015, 436.
Sakai K, Abe K, Fuke H, Haino S, Hams T, Hasegawa M et al. BESS-polar measurements of the cosmic-ray proton and helium spectra. Proceedings of Science. 2015;30-July-2015. 436.
Sakai, K. ; Abe, K. ; Fuke, H. ; Haino, S. ; Hams, T. ; Hasegawa, M. ; Horikoshi, A. ; Itazaki, A. ; Kim, K. C. ; Kumazawa, T. ; Kusumoto, A. ; Lee, M. H. ; Makida, Y. ; Matsuda, S. ; Matsukawa, Y. ; Matsumoto, K. ; Mitchell, J. W. ; Myers, Z. ; Nishimura, J. ; Nozaki, M. ; Orito, R. ; Ormes, J. F. ; Picot-Clemente, N. ; Sasaki, M. ; Seo, E. S. ; Shikaze, Y. ; Shinoda, R. ; Streitmatter, R. E. ; Suzuki, J. ; Takasugi, Y. ; Takeuchi, K. ; Tanaka, K. ; Thakur, N. ; Yamagami, T. ; Yamamoto, A. ; Yoshida, T. ; Yoshimura, Koji. / BESS-polar measurements of the cosmic-ray proton and helium spectra. In: Proceedings of Science. 2015 ; Vol. 30-July-2015.
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AU - Sakai, K.

AU - Abe, K.

AU - Fuke, H.

AU - Haino, S.

AU - Hams, T.

AU - Hasegawa, M.

AU - Horikoshi, A.

AU - Itazaki, A.

AU - Kim, K. C.

AU - Kumazawa, T.

AU - Kusumoto, A.

AU - Lee, M. H.

AU - Makida, Y.

AU - Matsuda, S.

AU - Matsukawa, Y.

AU - Matsumoto, K.

AU - Mitchell, J. W.

AU - Myers, Z.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Orito, R.

AU - Ormes, J. F.

AU - Picot-Clemente, N.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Shinoda, R.

AU - Streitmatter, R. E.

AU - Suzuki, J.

AU - Takasugi, Y.

AU - Takeuchi, K.

AU - Tanaka, K.

AU - Thakur, N.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yoshida, T.

AU - Yoshimura, Koji

PY - 2015

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AB - The energy spectra of cosmic-ray protons and helium near solar minimum were measured with BESS-Polar (Balloon-borne Experiment with a Superconducting Spectrometer-Polar) during long-duration flights over Antarctica in December 2004 and December 2007, and are discussed here. The absolute fluxes and spectral shapes of primary protons and helium probe the origin and the propagation history of cosmic rays in the Galaxy. The spectra are also essential as inputs to calculate the spectrum of cosmic-ray antiprotons, which are secondary products of cosmic-ray interactions with the interstellar gas. We report absolute spectra at the top of the atmosphere for cosmic-ray protons in the kinetic energy range 0.2-160 GeV and helium nuclei 0.2-80 GeV/nucleon [1].

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