Speaker
Description
High-energy cosmic rays, impinging onto the atmosphere of the Earth, initiate extensive air showers. KASCADE-Grande was recording such air showers over a wide energy range from about 10^5 GeV to almost 10^9 GeV. The properties of cosmic rays have been determined with unprecedented precision and the KASCADE-Grande results have boosted our understanding of the astrophysical origin of cosmic rays. Due to the high detector density and the long exposure time the results are not constraint by the number of air showers recorded. The main uncertainty for the interpretation of the recorded air showers is our incomplete understanding of inelastic hadronic interactions at high energies, in particular in the kinematic forward region. The air-shower data are used to set constraints on hadronic interaction models. Recent results will be presented.