Some possible interpretations from data of the CODALEMA experiment

TL;DR

This paper discusses the CODALEMA experiment's advancements in radio detection of ultra-high energy cosmic rays, including new array deployment and analysis methods considering geomagnetic effects.

Contribution

It introduces a new array of 60 self-triggered radio stations and analyzes their implications for cosmic ray recognition and wave-front analysis.

Findings

Enhanced detection area with new array deployment

Incorporation of geomagnetic effects in energy analysis

Improved methods for cosmic ray recognition

Abstract

The purpose of the CODALEMA experiment, installed at the Nan\c{c}ay Radio Observatory (France), is to study the radio-detection of ultra-high energy cosmic rays in the energy range of $10^{16}-10^{18} eV$. Distributed over an area of 0.25 km$^2$, the original device uses in coincidence an array of particle detectors and an array of short antennas, with a centralized acquisition. A new analysis of the observable in energy for radio is presented from this system, taking into account the geomagnetic effect. Since 2011, a new array of radio-detectors, consisting of 60 stand-alone and self-triggered stations, is being deployed over an area of 1.5 km$^2$ around the initial configuration. This new development leads to specific constraints to be discussed in term of recognition of cosmic rays and in term of analysis of wave-front.