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Radioelectric Field Features of Extensive Air Showers Observed with CODALEMA

Abstract : Based on a new approach to the detection of radio transients associated with extensive air showers induced by ultra high energy cosmic rays, the experimental apparatus CODALEMA is in operation, measuring about 1 event per day corresponding to an energy threshold ~ 5. 10^16 eV. Its performance makes possible for the first time the study of radio-signal features on an event-by-event basis. The sampling of the magnitude of the electric field along a 600 meters axis is analyzed. It shows that the electric field lateral spread is around 250 m (FWHM). The possibility to determine with radio both arrival directions and shower core positions is discussed.
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D. Ardouin, A. Belletoile, Didier Charrier, Richard Dallier, L. Denis, et al.. Radioelectric Field Features of Extensive Air Showers Observed with CODALEMA. Astroparticle Physics, Elsevier, 2006, 26 (4-5), pp.341-350. ⟨10.1016/j.astropartphys.2006.07.002⟩. ⟨in2p3-00111825⟩

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