Gyrokinetic particle simulation model
type: Item
instance of: scholarly article
title: Gyrokinetic particle simulation model
zbMATH Open document ID: 0619.76063
DOI: 10.1016/0021-9991(87)90080-5
published in: Journal of Computational Physics
publication date: 1987-01-01T00:00:00Z
full work available at URL: metadc1072678
review text: A new type of particle simulation model based on the gyrophase-averaged Vlasov and Poisson equations is presented. The reduced system in which particle gyrations are removed from the equations of motion while the finite Larmor radius effects are still preserved, is most suitable for studying low frequency microinstabilities in magnetized plasmas. The resulting gyrokinetic plasma is intrinsically quasineutral for \(\lambda_ D\ll \rho_ s\). Thus, without the troublesome space charge waves in the simulation, we can afford to use much larger time steps and grid spacings at a much reduced noise level than we would have for conventional particle codes. Furthermore, it is feasible to simulate an elongated system with a three-dimensional grid using the present model without resorting to the usual mode expansion technique, since there is essentially no restriction on the size of \(\Delta x_{\|}\) in a gyrokinetic plasma. The new approach also enables us to further separate the time and spatial scales of the simulation from those associated with global transport through the use of multiple spatial scale expansion. Thus, the model can be a very efficient tool for studying anomalous transport problems related to steady-state drift-wave turbulence in magnetic confinement devices. It can also be applied to other areas of plasma physics.
Mathematics Subject Classification ID: 76E25
Mathematics Subject Classification ID: 76X05
Mathematics Subject Classification ID: 82D10
Mathematics Subject Classification ID: 35Q99
Mathematics Subject Classification ID: 76M99
Mathematics Subject Classification ID: 65Z05
zbMATH DE Number: 4005861
zbMATH Keywords: gyrophase-averaged Vlasov-Poisson system
zbMATH Keywords: particle simulation model
zbMATH Keywords: Poisson equations
zbMATH Keywords: finite Larmor radius effects
zbMATH Keywords: low frequency microinstabilities
zbMATH Keywords: magnetized plasmas
zbMATH Keywords: gyrokinetic plasma
zbMATH Keywords: elongated system
zbMATH Keywords: three-dimensional grid
zbMATH Keywords: mode expansion technique
zbMATH Keywords: global transport
zbMATH Keywords: multiple spatial scale expansion
zbMATH Keywords: anomalous transport problems
zbMATH Keywords: steady-state drift-wave turbulence
zbMATH Keywords: magnetic confinement devices
author: W. William Lee
MaRDI profile type: Publication
OpenAlex ID: W2002774347
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description: scientific article; zbMATH DE number 4005861