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Astroparticle Physics 26 (2006) 341-350
Radioelectric Field Features of Extensive Air Showers Observed with CODALEMA
D. Ardouin1, A. Belletoile1, D. Charrier1, R. Dallier1, L. Denis2, P. Eschstruth3, T. Gousset1, F. Haddad1, J. Lamblin1, P. Lautridou1, A. Lecacheux4, D. Monnier-Ragaigne3, O. Ravel1, T. Saugrin1, S. Valcares1
CODALEMA Collaboration(s)

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.
1 :  SUBATECH - Laboratoire SUBATECH Nantes
2 :  USN - Unité Scientifique de la Station de Nançay
3 :  LAL - Laboratoire de l'Accélérateur Linéaire
4 :  LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique
Radio detection – Ultra-high-energy cosmic rays
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