Astrophysics

Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
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 …
Protons in near earth orbit
The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space …
Search for antihelium in cosmic rays.
The alpha magnetic spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7° orbit at altitudes …