Flux time variation measurements of cosmic-ray helium isotopes with BESS-Polar I

N. Picot-Clémente, 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, A. A. Moiseev, J. Nishimura, M. NozakiR. Orito, J. F. Ormes, K. Sakai, 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, K. Yoshimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Balloon-borne Experiment with Superconducting magnet Spectrometer (BESS) instrument includes various particle detectors, such as plastic scintillator counters and a central jet-type drift chamber surrounded by a superconducting solenoid magnet. Measurements provided by these detectors allow precise identification of cosmic-ray helium isotopes. The long-duration flight of the BESS-Polar I instrument, about 8.5 days over Antarctica in 2004, allows for the first time to measure time variations of isotope fluxes. The time variation of the helium isotope flux for rigidities from 1.2 GV to 2.5 GV is presented, and the results are discussed and compared with previously reported proton data and neutron monitor data.

Original languageEnglish
Title of host publicationProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
PublisherSociedade Brasileira de Fisica
ISBN (Electronic)9788589064293
Publication statusPublished - 2013
Externally publishedYes
Event33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil
Duration: Jul 2 2013Jul 9 2013

Publication series

NameProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Volume2013-October

Other

Other33rd International Cosmic Rays Conference, ICRC 2013
CountryBrazil
CityRio de Janeiro
Period7/2/137/9/13

Keywords

  • Cosmic-ray flux time variations
  • Cosmic-ray isotopes
  • Solar activity
  • Solar modulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Picot-Clémente, N., 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., Moiseev, A. A., Nishimura, J., ... Yoshimura, K. (2013). Flux time variation measurements of cosmic-ray helium isotopes with BESS-Polar I. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October). Sociedade Brasileira de Fisica.