Air-shower simulations with and without thinning: artificial fluctuations and their suppression

Abstract

The most common way to simplify extensive Monte-Carlo simulations of air showers is to use the thinning approximation. We study its effect on the physical parameters reconstructed from simulated showers. To this end, we have created a library of showers simulated without thinning with energies from 10^17 eV to 10^18 eV, various zenith angles and primaries. This library is publicly available. Physically interesting applications of the showers simulated without thinning are discussed. Observables reconstructed from these showers are compared to those obtained with the thinning approximation. The amount of artificial fluctuations introduced by thinning is estimated. A simple method, multisampling, is suggested which results in a controllable suppression of artificial fluctuations and at the same time requires less demanding computational resources as compared to the usual thinning.

8 pages, revtex. The shower library is available at http://livni.inr.ac.ru; v2: extended discussion of the multisampling

References in corpus (2)

• QGSJET-II: towards reliable description of very high energy hadronic interactions
• Comparison of AGASA data with CORSIKA simulation

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• No muon excess in extensive air showers at 100-500 PeV primary energy: EAS-MSU results
• Air Shower Simulation and Hadronic Interactions
• A comprehensive study of shower to shower fluctuations
• A Simple Parallelization Scheme for Extensive Air Shower Simulations