Flight performance of the BESS-Polar aerogel cherenkov counter

T. Hams, K. Abe, H. Fuke, S. Haino, K. C. Kim, T. Kumazawa, M. H. Lee, Y. Makida, S. Matsuda, H. Matsumoto, K. Matsumoto, J. W. Mitchell, A. A. Moiseev, Z. D. Myers, J. Nishimura, M. Nozaki, A. Ogata, M. Oikawa, J. F. Ormes, M. SasakiE. S. Seo, Y. Shikaze, R. E. Streitmatter, J. Suzuki, K. Takeuchi, K. Tanaka, T. Taniguchi, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)


The BESS-Polar balloon payload had its first flight on December 13th-21st, 2004 (UTC) from McMurdo Station, Antarctica. The flight duration was over eight days and more than 9 × 108 cosmic-ray events were recorded. An overview of the BESS-Polar flight, the status of the antiproton analysis, and a discussion of the low-power readout electronics and data acquisition system can be found elsewhere in these proceedings. In this paper we discuss the design, testing, and flight performance of the BESS-Polar Cherenkov counter, which operated in ambient conditions outside a pressure vessel. The silica-aerogel Cherenkov radiator had a nominal index-of-refraction, n = 1.02 , yielding an lower limit for the most likely photoelectron (PE) number of 7 in the center of the counter and 9 near the photomultiplier tubes.

Original languageEnglish
Number of pages4
Publication statusPublished - 2005
Externally publishedYes
Event29th International Cosmic Ray Conference, ICRC 2005 - Pune, India
Duration: Aug 3 2005Aug 10 2005


Other29th International Cosmic Ray Conference, ICRC 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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