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HK: Fachverband Hadronen und Kerne
HK 17: Astroparticle Physics
HK 17.3: Talk
Monday, March 16, 2009, 17:30–17:45, H-ZO 70
Modelling Geo-magnetic radiation from Extensive Air Showers — •Krijn de Vries1, Olaf Scholten1, and Klaus Werner2 — 1KVI, University of Groningen, The Netherlands — 2Subatech, Universaty of Nantes, France
An incoming ultra high energy cosmic ray (UHECR) entering our atmosphere will create a so called extensive air shower (EAS). A cascade of particles flying toward the Earth's surface with extremely high velocities. As a result of this they are concentrated in a thin shower front, which can be visualized by a pancake of particles flying toward the Earth. The deflection of electrons and positrons due to the Earth magnetic field in combination with retardation effectis is responsible for an electromagnetic pulse to be emitted within the radio frequency range.
Concentrating on a macroscopic description, focussing on the net current created due to the deflection of the electrons and positrons in the Earth magnetic field, a model has been made to simulate the radio signal for a realistic air shower. Several different contributions to the electric pulse have been included to obtain more realistic simulations and have a better comparison with measured data.