Computer Science – Performance
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..169a&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 13, no. 2, p. 169-172.
Computer Science
Performance
1
Antimatter, Antiparticles, Gamma Rays, Radiation Counters, Superconducting Magnets, Absorption Spectra, Balloon-Borne Instruments, Helium, Spectrometers
Scientific paper
A Balloon Experiment with Superconducting Spectrometer (BESS) to search for primordial antimatter abundance in cosmic radiation and to measure antiproton spectrum is being prepared. A large geometry factor of 1.2 sq m sr was achieved by the solenoidal detector configuration. The magnet provides a uniform magnetic field of 1.2 tesla over a cylindrical volume of 0.8 m in diameter and 1.0 m in length. Antihelium nuclei can be searched for to a level of anti-He/He of about 10 exp -8 and the low-energy primary antiproton flux can be observed down to antiproton/proton of about 10 exp -6. The superconducting magnet is constructed and excited to 1 tesla and shows good and stable performance. The main tracking device, a jet-type drift chamber, together with the readout electronics and data acquisition system are assembled and tested. A flight to test the detector performance at the balloon altitude was successfully carried out in September 1989.
Ajima Y.
Anraku K.
Haga Tsuneyuki
Imori M.
Nozaki Masatoshi
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