SIBYLL - AN EVENT GENERATOR FOR SIMULATION OF HIGH-ENERGY COSMIC-RAY CASCADES

We describe the physical basis and some applications of an efficient e vent generator designed for Monte Carlo simulations of atmospheric cas cades at ultrahigh energies. The event generator (SIBYLL) incorporates many features of the Lund programs, but emphasizes the fragmentation region and the production of minijets. A consistent treatment of hadro n-hadron and hadron-nucleus interactions is emphasized. Examples of ap plications are the calculation of coincident muons observed in deep un derground detectors and the simulation of the longitudinal development of air shower components in the atmosphere.