# The CODALEMA/EXTASIS experiment: a multi-scale and multi-wavelength instrument for radio-detection of extensive air-showers

Abstract : Hosted by the Nançay Radio Observatory, the CODALEMA experiment is dedicated to radio detection of cosmic ray induced extensive air showers. It is composed of:* 57 self-triggering radio detection stations working in the $20-200$ MHz band and spread over 1 km$^2$;* an array of 13 scintillators as particle detector;* a compact array made of $10$ cabled antennas, triggered by the particle detector;* a small array of 5 cabled antennas, and whose role is to figure out the capabilities of a phased antenna cluster to cleverly select air shower events;* a 3D detector, measuring the electric field in three orthogonal polarizations.Also supported by CODALEMA is the R&D EXTASIS project, aiming at detecting the low-frequency signal (1-10 MHz) produced at the sudden disappearance of the air shower particles hitting the ground. All these antenna arrays present different density and extent, and can be operated in a joint mode to record simultaneously the radio signal coming from an air shower. Therefore, the Nançay facilities may offer a complete description of the air shower induced electric field at small, medium and large scale, and over an unique and very wide frequency band (from 2 to 200 MHz). We describe the current instrumental set-up and the performances of CODALEMA/EXTASIS.
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https://hal.archives-ouvertes.fr/hal-01891000
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ICRC2017_416.pdf
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### Citation

Benoît Revenu, Didier Charrier, Richard Dallier, Antony Escudie, Daniel García-Fernández, et al.. The CODALEMA/EXTASIS experiment: a multi-scale and multi-wavelength instrument for radio-detection of extensive air-showers. 35th International Cosmic Ray Conference, Jul 2017, Busan, South Korea. pp.416, ⟨10.22323/1.301.0416⟩. ⟨hal-01891000⟩

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