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arxiv 1511.03045 v1 pith:N7LEXQSY submitted 2015-11-10 physics.ao-ph astro-ph.HE

Influence of Atmospheric Electric Fields on the Radio Emission from Extensive Air Showers

classification physics.ao-ph astro-ph.HE
keywords atmosphericelectricshowersdependenceextensivefieldfieldsfrequency
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The atmospheric electric fields in thunderclouds have been shown to significantly modify the intensity and polarization patterns of the radio footprint of cosmic-ray-induced extensive air showers. Simulations indicated a very non-linear dependence of the signal strength in the frequency window of 30-80 MHz on the magnitude of the atmospheric electric field. In this work we present an explanation of this dependence based on Monte-Carlo simulations, supported by arguments based on electron dynamics in air showers and expressed in terms of a simplified model. We show that by extending the frequency window to lower frequencies additional sensitivity to the atmospheric electric field is obtained.

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