BESS AND ITS FUTURE PROSPECT FOR POLAR LONG DURATION FLIGHTS BESS

• Main Authors: A. Yamamoto, K. Abe, K. Anraku, Y. Asaoka, M. Fujikawa, H. Fuke, S. Haino, M. Imori, K. Izumi, T. Maeno, Y. Makida, N. Matsui, H. Matsumoto, H. Matsunaga, F. B. Mcdonald, J. Mitchell, T. Mitsui 't, A. Moiseev, M. Motoki, J. Nishimura, M. Nozaki, S. Orito, J. F. Ormes, D. Righter, T. Saeki, T. Sanuki, M. Sassld, E. S. Seo, Y. Shikaze, T. Sonoda, R. Streitmatter, J. Suzuki T, K. Tanaka T, K. Tanizaki, I Ueda, J. Z. Wang, N. Yajima, T. Yamagami, Y. Yamamoto, H. Yamaoka, K. Yamato, T. Yoshida T, K. Yoshimura
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: The Balloon-borne Experiment with a Superconducting Solenoid Magnet Spectrometer; BESS; has; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.622.4976; http://www.atic.umd.edu/pub/ASR_Yamamoto.pdf

The Balloon-borne Experiment with a Superconducting Spectrometer, BESS, aims to study elementary particle/antiparticle phenomena inthe early history of the Universe. The instrument has a unique feature of a thin superconducting solenoid magnet enabling a large geometrical cceptance with a horizontally cylindrical configuration. Seven balloon flights have been successfully carried out since 1993. More than 103 comic-ray antiproton have been unambiguously detected, and the energy spectrum has been measured with the characteristic peak at 2 GeV. The search for cosmic-ray antihelium brought he upper-limit of the antihelium/helium ratio down to < 10 6. TO extend the highly sensitive measurements, we are planning polar long duration flights in Antarctica focusing on the very low energy antiproton spectrum towards the solar-minimum in the next decade. © 2002 COSPAR. Published by Elsevier Science Ltd.