International School of Cosmic Ray Astrophysics

16^th  Course: "Gamma Ray and Cosmic Ray Astrophysics: From below GeV to beyond EeV Energies"

 5-12 July 2008
Ettore Majorana Centre
Erice, Sicily, Italy

Topic: Results from TRACER - Propagation and Source Abundances of galactic Cosmic Rays
Lecturer: Andreas Obermeier

The LDB flights of TRACER in Antarctica (2003) and from Sweden (2006) have provided a most comprehensive dataset on the energy spectra of heavy cosmic-ray nuclei with single element resolution. After an introduction to the TRACER instrument and its measurement technique, results from the 2003 flight will be discussed in the context of a simple model of galactic propagation. These results include elements from oxygen to iron up to energies of about 10^14 eV. The data analysis of the 2006 flight is still ongoing, but some preliminary results will be presented that demonstrate TRACER's ability to measure the boron to carbon ratio at high energies.