# ARENA 2016

7-10 June 2016
Groningen, Netherlands
Europe/Amsterdam timezone

## Simulation of the Radiation Energy Release in Air Showers

8 Jun 2016, 10:10
20m
Groningen, Netherlands

#### Groningen, Netherlands

Hampshire Plaza Hotel

### Speaker

Christian Glaser (RWTH Aachen University)

### Description

A simulation study of the energy released by extensive air showers in the form of MHz radiation is performed using the CoREAS simulation code. We develop an efficient method to extract this radiation energy from air-shower simulations. We determine the longitudinal profile of the radiation energy release and compare it to the longitudinal profile of the energy deposit by the electromagnetic component of the air shower. We find that the radiation energy corrected for the geometric dependence of the geomagnetic emission scales quadratically with the energy in the electromagnetic component of the air shower with a second order dependency on the atmospheric density at the position of the maximum of the shower development $X_\mathrm{max}$. In a measurement where $X_\mathrm{max}$ is not accessible, this second order dependence can be approximated using the zenith angle of the incoming direction of the air shower with only a minor deterioration in accuracy. This method results in an intrinsic uncertainty of 4% which is well below current experimental uncertainties.

### Primary author

Christian Glaser (RWTH Aachen University)

### Co-authors

Johannes Schulz (RU Nijmegen) Jörg Hörandel (Ru Nijmegen/Nikhef) Martin Erdmann (Rheinisch-Westfaelische Tech. Hoch. (DE)) Tim Huege (KIT)