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Published 1997 | Published
Book Section - Chapter Open

Measurement of the Absolute Proton and Helium Flux at the Top of the Atmosphere using IMAX

Abstract

The balloon-borne experiment "IMAX" launched from Lynn Lake, Canada in 1992 has been used to measure the cosmic ray proton and helium spectra from 0.2 GeV/n to about 200 GeV/n. The IMAX apparatus was designed to search for antiprotons and light isotopes using a superconducting magnet spectrometer with ancillary scintillators, time-of-flight, and aerogel cherenkov detectors. Using redundant detectors an extensive examination of the instrument efficiency was carried out. We present here the absolute spectra of protons and helium corrected to the top of the atmosphere.

Additional Information

© Space Research Unit. Provided by the NASA Astrophysics Data System.

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