Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 29: Kosmische Strahlung II

T 29.10: Vortrag

Dienstag, 20. März 2018, 18:50–19:05, Philo-HS6

Optimisation of thinning for air shower simulations — •Maximilian Reininghaus, Ralph Engel, and Ralf Ulrich — Institut für Kernphysik, Karlsruher Institut für Technologie

Thinning is an important technique to drastically reduce both computation time and size of output data in Monte-Carlo simulations of air showers, especially at highest energies. Instead of tracking every single particle produced in an interaction, a thinning algorithm randomly decides which particles are retained for further propagation while the remaining ones are discarded. To account for these discarded particles, a statistical weight is assigned to the retained particles.

However, this procedure introduces artificial fluctuations to observable quantities. Since these fluctuations spoil the quality of the simulation to some degree, it is important to study ways of optimising the procedure. In this contribution we compare different thininng algorithms, the influences of different implementations of weight limitation and modified probability distributions for the particle selection within the framework of a simple one-dimensional toy model of air showers.