REAS2: CORSIKA-based Monte Carlo simulations of geosynchrotron radio emission

TL;DR

REAS2 is an improved Monte Carlo simulation tool for geosynchrotron radio emission from air showers, replacing analytical parameterisations with detailed histograms from CORSIKA, enabling more realistic modeling.

Contribution

REAS2 introduces a new simulation approach using detailed histograms from CORSIKA, replacing previous analytical models for more accurate air shower simulations.

Findings

More realistic air shower modeling with CORSIKA histograms.

Enhanced simulation accuracy for radio emission predictions.

Ability to compare parameterisation and histogram-based results.

Abstract

Simulations of geosynchrotron radio emission from extensive air showers performed with the Monte Carlo code REAS1 used analytical parameterisations to describe the spatial, temporal, energy and angular particle distributions in air showers. The successor REAS2 replaces these parameterisations with precise, multi-dimensional histograms derived from per-shower CORSIKA simulations. REAS2 allows an independent selection between parameterisation and histogram for each of the relevant particle distributions, enabling us to study the changes arising from using a more realistic air shower model in detail. We describe the new simulation strategy and illustrate the effects introduced by the improved air shower model.