Search for anti-particles of cosmic origin with a superconducting spectrometer

K. Anraku, T. Haga, M. Imori, M. Nozaki, S. Orito, K. Shimamura, T. Tsunoda, T. Yoshida, K. Yoshimura, Y. Ajima, H. Ikeda, S. Inaba, T. Haruyama, Y. Higashi, Y. Makida, J. Suzuki, A. Yamamoto, J. Nishimura, T. Yamagami, R. GoldenB. Kimbell

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A Balloon Experiment with Superconducting Spectrometer (BESS) to search for primordial anti-matter abundance in cosmic radiation and to measure anti-proton spectrum is being prepared. A large geometry factor of 1.2 m2sr was achieved by the solenoidal detector configuration. The magnet provides an uniform magnetic field of 1.2 tesla over a cylindrical volume of 0.85m in diameter and 1.0m in length. Anti-helium nuclei will be searched for to a level of anti-He/He∼10-8 and the low energy primary anti-proton flux will be observed down to anti-proton/proton∼10-6. The superconducting magnet has been constructed and excited to 1 tesla and showed good and stable performance. The main tracking device, jet type drift chamber, together with the readout electronics and data acquisition system have been assembled and tested. A flight to test the detector performance at the balloon altitude was successfully carried out in September 1989.

Original languageEnglish
Pages (from-to)169-172
Number of pages4
JournalAdvances in Space Research
Issue number2
Publication statusPublished - Feb 1993
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences


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