Proton and Helium Spectra from the CREAM-III Flight

Understand

Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004.

• The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season.
• Energies of incident particles above 1 TeV are measured with a calorimeter.
• Individual elements are clearly separated with a charge resolution of ~0.12 e (in charge units) and ~0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors.