# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## Multi-scale and multi-frequency studies of cosmic ray air shower radio signals at the CODALEMA site

Aug 3, 2015, 11:00 AM
15m
Amazon (World Forum)

### Amazon

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX

### Speaker

Dr Richard Dallier (SUBATECH - Ecole des Mines de Nantes - CNRS/IN2P3 - Université de Nantes)

### Description

Since 2003, the Nançay Radio Observatory hosts the CODALEMA experiment, dedicated to the radio detection of cosmic ray induced extensive air showers. After several instrumental upgrades, CODALEMA is now composed of: - 57 self-triggering radio detection stations working in the 20-250 MHz band, spread over 1 km$^2$; - an array of 13 scintillators acting as a particle detector; - a compact array of 10 cabled antennas, triggered by the particle detector, to test the capabilities of a phased antenna cluster to cleverly select air shower events. In addition, CODALEMA supports the EXTASIS project, aiming at detecting the low-frequency signal produced by the sudden deceleration of the air shower particles hitting the ground. Beside these dedicated arrays, the Nançay site will host the NenuFAR radio telescope (recognized as a SKA pathfinder), made of 1824 dual crossed-polarization antennas similar to the CODALEMA ones. All these arrays present different antenna density and extent, and could be operated in a joint mode to record simultaneously the radio signal coming from an air shower. Therefore, the upgraded CODALEMA facilities could 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 ~250 MHz). The use of multi-band detectors combined with composite trigger algorithms could help boosting the radio detection technique as a candidate for a further very large cosmic ray observatory, or in the frame of a large radio telescope such as SKA. We describe the current instrumental set-up and the last results obtained, together with the prospective developments of the radio detection technique.
Registration number following "ICRC2015-I/" 494 -- not specified --

### Primary author

Dr Richard Dallier (SUBATECH - Ecole des Mines de Nantes - CNRS/IN2P3 - Université de Nantes)

### Co-authors

Dr Alain Lecacheux (LESIA - Observatoire de Paris) Benoît Revenu (CNRS/IN2P3) Didier CHARRIER (SUBATECH) Dr Diego TORRES-MACHADO (Universidade Federal do Rio de Janeiro) Florian Gaté (SUBATECH) Herve Carduner (SUBATECH) Jean-Luc Beney (SUBATECH) Mr Laurent Denis (US Nançay - Observatoire de Paris) Lilian Martin (CNRS) Vincent Marin (SUBATECH)

### Presentation materials

 dallierICRC2015.pdf dallierTalkICRC2015.pdf