BEss-polar experiment -progress and future prospect-

K. Yoshimura, A. Yamamoto, K. Abe, H. Fuke, S. Haino, T. Hams, M. Hasegawa, A. Horikoshi, K. C. Kim, A. Kusumoto, M. H. Lee, Y. Makida, S. Matsuda, Y. Matsukawa, J. W. Mitchell, A. A. Moiseev, J. Nishimura, M. Nozaki, R. Orito, J. F. OrmesK. Sakai, M. Sasaki, E. S. Seo, R. Shinoda, R. E. Streitmatter, J. Suzuki, K. Tanaka, N. Thakur, T. Yamagami, T. Yoshida

Research output: Contribution to journalArticle


The aims of the BESS-Polar experiment are precise measurements of the low-energy antiproton spectrum and search for cosmologically significant antimatter. After its first flight (BESS-Polar I), we had developed a new spectrometer based on the feedback from the results. Most of the detector components had been redesigned and upgraded to improve their performance and to increase the data taking period and capacity. The second flight (BESS-Polar II) was successfully carried out in December 2007- January 2008. We performed 24.5 days scientific observation just at the solar minimum. In this paper, BESS-Polar II instrument and flight summary will be presented.

Original languageEnglish
Pages (from-to)29-34
Number of pages6
Journaljournal of the physical society of japan
Issue numberSUPPL. A
Publication statusPublished - 2009


  • Antarctica
  • Antihelium
  • Antiproton
  • BESS
  • Cosmic-ray
  • Long duration balloon flight
  • Solar activity
  • Superconducting spectrometer

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Yoshimura, K., Yamamoto, A., Abe, K., Fuke, H., Haino, S., Hams, T., Hasegawa, M., Horikoshi, A., Kim, K. C., Kusumoto, A., Lee, M. H., Makida, Y., Matsuda, S., Matsukawa, Y., Mitchell, J. W., Moiseev, A. A., Nishimura, J., Nozaki, M., Orito, R., ... Yoshida, T. (2009). BEss-polar experiment -progress and future prospect-. journal of the physical society of japan, 78(SUPPL. A), 29-34.