Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01

Abstract

A measurement of the cosmic ray positron fraction e+/(e+ + e-) in the energy range of 1-30 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its 10 day Space Shuttle flight in June 1998. A proton background suppression on the order of 10^6 is reached by identifying converted bremsstrahlung photons emitted from positrons.

20 pages, Latex, 7 .eps figures

References in corpus (2)

• Production and propagation of cosmic-ray positrons and electrons
• New Measurement of the Cosmic-Ray Positron Fraction from 5 to 15 GeV

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