Conveners
Radio Detection Theory
- David Seckel (University of Delaware)
Radio Detection Theory
- Tim Huege (KIT)
Radio Detection Theory
- Tim Huege (KIT)
Tim Huege
(KIT)
20/06/2012, 14:30
Invited Talk
A precise understanding of the radio emission from extensive air showers is of fundamental importance for the design of cosmic ray radio detectors as well as the analysis and interpretation of their data.
In recent years, tremendous progress has been made in the understanding of the emission physics both in macroscopic and microscopic frameworks. A...
Dr
Tim Huege
(Karlsruhe Institute of Technology)
20/06/2012, 15:10
Specialised Talk
In the Monte Carlo simulation code REAS, radio emission from air showers is calculated using the "endpoint formalism". No assumptions on the emission mechanism have to be made in this parameter-free approach.
REAS simulations are based on particle distributions which have been simulated with CORSIKA and then exported as 4-dimensional histograms. During the histogramming, however,...
Krijn D. de Vries
(KVI/University of Groningen)
20/06/2012, 15:30
Specialised Talk
A comprehensive overview of the newly developed EVA-code will be given by making a direct comparison to the MGMR-code. Both codes perform a macroscopic calculation of radio emission from cosmic-ray-induced air showers. The MGMR-model is based on parameterized shower distributions ignoring the lateral extend of the shower. Furthermore, all calculations ignored Cherenkov effects. To take into...
Olaf Scholten
(KVI/University of Groningen)
20/06/2012, 15:50
Specialised Talk
We discuss the first results of macroscopic calculations based on full Monte-Carlo simulations including a realistic index of refraction using the EVA-code. Due to the finite refractivity Cherenkov effects play an important role in radio emission from air showers. We show that the observed frequency spectrum depends strongly on the distance from the shower core. At the Cherenkov angle the high...
Dr
Washington Carvalho Jr.
(University of Santiago de Compostela)
20/06/2012, 16:10
Specialised Talk
Using the ZHAireS Monte Carlo code, we show that the Fourier-spectrum of the radio emission of inclined air showers can have a sizable intensity up to the GHz frequency range. At these frequencies, only the fraction of shower development seen at an angle close to the Cherenkov angle contributes to the observable emission, which is mainly due to the geomagnetic and charge excess mechanisms. ...
Vincent Marin
(Subatech)
21/06/2012, 18:00
Specialised Talk
We present a microscopic computation of the radio emission from air showers initiated by ultra-high energy cosmic rays in the atmosphere. The strategy adopted is to compute each secondary particle contribution of the electromagnetic component and to construct the total signal at any location. SELFAS2 is a code which doesn’t rely on air shower generators like AIRES or CORSIKA and it is based on...
David Seckel
(University of Delaware)
22/06/2012, 11:15
Specialised Talk
A fast semi-analytic frequency domain calculation for the radio emission from cosmic ray air showers is presented. The shower is treated as a smooth macroscopic current source, separable in cartesian "shower"-coordinates, which facilitates calculation of phase coherence at a remote detector. Time delays account for geometry and varying index of refraction along the shower profile. Current...
Clancy James
(University of Erlangen-Nuernberg)
22/06/2012, 11:35
Specialised Talk
The 'Tamm Problem' (Tamm, 1939) is the calculation of the electromagnetic radiation emitted by a particle travelling a finite distance at a uniform (relativistic) velocity in a medium. It is exactly the problem which needs to be solved in Monte-Carlo simulations of the radio-emission from individual particles. The two main formulas used in calculations - the ZHS algorithm and the endpoint...
Dr
Konstantin Belov
(UCLA)
22/06/2012, 11:55
Specialised Talk
While the fluorescence and the ground counter techniques of the ultra-high energy cosmic rays (UHECR) detection were being developed for decades, the interest in the radio detection diminished after the initial experiments in the 1960s. As a result, the fluorescence and the surface array techniques are more mature today, providing more reliable measurements of the primary cosmic particle...
