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Results of a self-triggered prototype system for radio-detection of extensive air showers at the Pierre Auger Observatory
Abreu P., Avenier M., Berat C., Chauvin J., Koang D.H. et al
Journal of Instrumentation 7 (2012) P11023 - http://hal.in2p3.fr/in2p3-00748795
Physique/Astrophysique/Phénomènes cosmiques de haute energie
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
Results of a self-triggered prototype system for radio-detection of extensive air showers at the Pierre Auger Observatory
P. Abreu, M. Avenier1, C. Berat1, J. Chauvin1, D.H. Koang1, S. Le Coz1, D. Lebrun1, K. Louedec1, F. Montanet1, A. Stutz1, M. Tartare1, C. Rivière1, P. Stassi1, A. Bell etoile2, R. Dallier2, P. Lautridou2, J. Maller2, V. Marin2, L. Martin2, O. Ravel2, Benoît Revenu ()2, D. Torres Machado2, S. Acounis2, D. Charrier2, T. Gar con, R. Bardenet3, A. Cordier3, S. Dagoret-Campagne3, D. Garcia Gamez3, B. Kégl3, K. Louedec1, 3, D. Monnier Ragaigne3, M. Urban3
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
53 avenue des Martyrs - 38026 Grenoble Cedex
2 :  SUBATECH - Laboratoire SUBATECH Nantes
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
3 :  LAL - Laboratoire de l'Accélérateur Linéaire
CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud
Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex
We describe the experimental setup and the results of RAuger, a small radio-antenna array, consisting of three fully autonomous and self-triggered radio-detection stations, installed close to the center of the Surface Detector (SD) of the Pierre Auger Observatory in Argentina. The setup has been designed for the detection of the electric field strength of air showers initiated by ultra-high energy cosmic rays, without using an auxiliary trigger from another detection system. Installed in December 2006, RAuger was terminated in May 2010 after 65 registered coincidences with the SD. The sky map in local angular coordinates (i.e., zenith and azimuth angles) of these events reveals a strong azimuthal asymmetry which is in agreement with a mechanism dominated by a geomagnetic emission process. The correlation between the electric field and the energy of the primary cosmic ray is presented for the first time, in an energy range covering two orders of magnitude between 0.1 EeV and 10 EeV. It is demonstrated that this setup is relatively more sensitive to inclined showers, with respect to the SD. In addition to these results, which underline the potential of the radio-detection technique, important information about the general behavior of self-triggering radio-detection systems has been obtained. In particular, we will discuss radio self-triggering under varying local electric-field conditions.

Articles dans des revues avec comité de lecture
Journal of Instrumentation
Publisher Institute of Physics: Hybrid Open Access
ISSN 1748-0221 

See paper for full list of authors - accepted for publication in JINST
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