The effects of spatial sampling on random noise for gyrokinetic PIC simulations in real space

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Technische Universität Darmstadt

Kuvaus

We study the effects of cloud-in-cell sampling and gyroaveraging on random noise in real space (as opposed to the common Fourier space presentation), and show that together, these can reduce the noise by a factor of 3 compared to nearest grid point sampling without gyroaveraging. Hence an order of magnitude less test particles are needed for the given noise level. We derive equations for noise level as a function of Larmor radius and also investigate the effect of gyroaveraging on noise in local gradients. The effect of number of gyropoints on noise is also discussed. (C) 2016 Elsevier B.V. All rights reserved.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut162-167
Sivumäärä6
JulkaisuComputer Physics Communications
Vuosikerta203
TilaJulkaistu - kesäkuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 4439237