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A novel technique for the numerical simulation of hot collision-free plasma; Vlasov Hybrid Simulation

A novel technique for the numerical simulation of hot collision-free plasma; Vlasov Hybrid Simulation
A novel technique for the numerical simulation of hot collision-free plasma; Vlasov Hybrid Simulation
This paper presents a highly efficient and stable algorithm for the numerical simulation of collision free plasma. This algorithm has been successfully used to numerically model non linear electron cyclotron resonance in VLF band radio waves in space, and has produced good simulations of radio emissions such as ‘dawn chorus’ and ‘triggered VLF emissions’. The algorithm fills the phase box with simulation particles which represent phase space trajectories. Particle trajectories are followed forwards continuously in time without restarts, and these particles are followed until either the simulation ends or the particles exit from the phase box. Liouville’s theorem tells us that distribution function F is conserved along these trajectories, and so F is known at the phase space points represented by the particle positions. No phase space volume is associated with these particles. At each time step F is truly interpolated, and not distributed from particles to the regular phase space grid, solely for the purpose of calculating plasma charge and current fields. For this operation a cheap low order interpolation is useable. The algorithm is simple, robust and highly efficient. There is NO diffusion in phase space whatsoever, and fine structure is merely undersampled and does not cause any instability problems. Regions of phase space where F=0 are cost free as no particles need be provided. The algorithm readily accommodates situations where phase fluid flows into or out of the phase box. The method has been successfully applied to the numerical modelling of the triggering of VLF emissions.
VLF emissions, numerical modelling, plasma simulation, Vlasov Hybrid Simulation
0021-9991
180-196
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5

Nunn, D , Nunn, D (ed.) (1993) A novel technique for the numerical simulation of hot collision-free plasma; Vlasov Hybrid Simulation. Journal of Computational Physics, 108, 180-196.

Record type: Article

Abstract

This paper presents a highly efficient and stable algorithm for the numerical simulation of collision free plasma. This algorithm has been successfully used to numerically model non linear electron cyclotron resonance in VLF band radio waves in space, and has produced good simulations of radio emissions such as ‘dawn chorus’ and ‘triggered VLF emissions’. The algorithm fills the phase box with simulation particles which represent phase space trajectories. Particle trajectories are followed forwards continuously in time without restarts, and these particles are followed until either the simulation ends or the particles exit from the phase box. Liouville’s theorem tells us that distribution function F is conserved along these trajectories, and so F is known at the phase space points represented by the particle positions. No phase space volume is associated with these particles. At each time step F is truly interpolated, and not distributed from particles to the regular phase space grid, solely for the purpose of calculating plasma charge and current fields. For this operation a cheap low order interpolation is useable. The algorithm is simple, robust and highly efficient. There is NO diffusion in phase space whatsoever, and fine structure is merely undersampled and does not cause any instability problems. Regions of phase space where F=0 are cost free as no particles need be provided. The algorithm readily accommodates situations where phase fluid flows into or out of the phase box. The method has been successfully applied to the numerical modelling of the triggering of VLF emissions.

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More information

Published date: 1993
Keywords: VLF emissions, numerical modelling, plasma simulation, Vlasov Hybrid Simulation
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 259021
URI: http://eprints.soton.ac.uk/id/eprint/259021
ISSN: 0021-9991
PURE UUID: 4d87fc2f-d583-4d5e-8321-45b1e2e1b09c

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Date deposited: 08 Mar 2004
Last modified: 14 Mar 2024 06:17

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Contributors

Author: D Nunn
Editor: D Nunn

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