Berlin 2005 – scientific programme

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T: Teilchenphysik

T 702: Kosmische Strahlung XII

T 702.4: Talk

Wednesday, March 9, 2005, 14:45–15:00, TU H106

Simulations of Radio Emission from Cosmic Ray Air Showers — •Tim Huege — MPIfR Bonn, Auf dem Hügel 69, 53121 Bonn

Cosmic ray air showers are known to emit pulsed radio emission in the frequency range from a few to a few hundred MHz, allowing to do cosmic ray research with radio techniques.

We have analysed the underlying emission mechanism in the scheme of coherent geosynchrotron radiation. Having performed a careful cross-check of our model using analytic and Monte Carlo simulations and having verified the agreement of our predictions with the historical data we now present our detailed simulation results.

Important findings are the absence of significant asymmetries in the total field strength emission pattern, the polarisation characteristics of the emission, allowing an unambiguous test of the geomagnetic emission mechanism, and the dependence of the radio emission on important air shower and observer parameters such as shower zenith angle, primary particle energy, depth of shower maximum and observer position. A parametrisation incorporating the aforementioned dependences summarises our results, providing a solid basis for the interpretation of experimental data gathered with LOPES and other experiments.