Anatomy of an extensive air shower: building an optimal radio emission calculation

Anatomy of an extensive air shower: building an optimal radio emission calculation
Juan Ammerman-Yebra, Harm Schoorlemmer
arXiv:2608.26077v1 Announce Type: new
Abstract: Radio emission from particle air showers is one of the most promising detection techniques to achieve an experiment with a large exposure in ultra-high-energy astroparticle physics. In this regime, above $10^{17}$ eV, the detailed calculation of the radio emission from Monte Carlo particle showers is sufficiently CPU intensive that statistical studies and optimization problems remain largely out of reach. In this article we examine the characteristics of the longitudinal and lateral development of extensive air showers, and exploit them to obtain a fast evaluation of the associated radio emission. We introduce the Coherent Radio Emission from Positrons and Electrons in Showers (CREPES) algorithm, in which the particle distributions are precomputed once and the emission is subsequently obtained from them, yielding a gain in speed of more than three orders of magnitude while preserving the accuracy of the microscopic calculation.arXiv:2608.26077v1 Announce Type: new
Abstract: Radio emission from particle air showers is one of the most promising detection techniques to achieve an experiment with a large exposure in ultra-high-energy astroparticle physics. In this regime, above $10^{17}$ eV, the detailed calculation of the radio emission from Monte Carlo particle showers is sufficiently CPU intensive that statistical studies and optimization problems remain largely out of reach. In this article we examine the characteristics of the longitudinal and lateral development of extensive air showers, and exploit them to obtain a fast evaluation of the associated radio emission. We introduce the Coherent Radio Emission from Positrons and Electrons in Showers (CREPES) algorithm, in which the particle distributions are precomputed once and the emission is subsequently obtained from them, yielding a gain in speed of more than three orders of magnitude while preserving the accuracy of the microscopic calculation.