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Current status of the CODALEMA/EXTASIS experiments

Abstract : Secondary electrons and positrons of air showers emit a coherent radio electric field in a wide frequency band. The CODALEMA experiment installed at the Nançay radioastronomy observatory since 2002 detects air showers and the associated electric field in [20; 200] MHz. EXTASIS, triggered by the CODALEMA scintillators, detects since 2016 the air shower electric field in [1; 6] MHz. We also expect an additional signal at low frequency: the sudden death pulse, corresponding to the sudden disappearance of the shower front particles when they reach the ground level. We present the instrumental setups, their performances and the first results of EXTASIS.
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https://hal.archives-ouvertes.fr/hal-02088629
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B. Revenu, D. Charrier, R. Dallier, A. Escudie, D. García-Fernández, et al.. Current status of the CODALEMA/EXTASIS experiments. 26th Extended European Cosmic Ray Symposium and 35th Russian Cosmic Ray Conference, Jul 2018, Barnaul, Russia. pp.012029, ⟨10.1088/1742-6596/1181/1/012029⟩. ⟨hal-02088629⟩

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