Collisional delta-{ital f} scheme with evolving background for transport time scale simulations

Journal Article · Wed Dec 01 04:00:00 EST 1999 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.873738· OSTI ID:698939

Brunner, S; Valeo, E; Krommes, J A ^[1]

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1. Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543--0451 (United States)

The {delta}f approach is extended for simulating the transport time-scale evolution of near-Maxwellian distributions in collisional plasmas. This involves simultaneously advancing weighted marker particles for representing the intrinsically kinetic component {delta}f, and fluid equations for the parameters of the shifted Maxwellian background f{sub SM}. The issue of increasing numerical noise in a collisional {delta}f algorithm, due to marker particle weight spreading, is addressed in detail, and a solution to this problem is proposed. To obtain higher resolution in critical regions of phase space, a practical procedure for implementing sources and sinks of marker particles is developed. As a proof of principal, this set of methods is applied for computing electrical Spitzer conductivity as well as collisional absorption in a homogeneous plasma. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 698939
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALGORITHMS
CHARGED-PARTICLE TRANSPORT
COLLISIONAL PLASMA
COLLISIONS
KINETIC EQUATIONS
KINETICS
PLASMA SIMULATION