Test particle transport in stochastic magnetic fields modeled by stochastic processes

1993 ◽  
Vol 5 (10) ◽  
pp. 3551-3557 ◽  
Author(s):  
Ludger Hannibal
Keyword(s):  
Magnetic Fields ◽  
Stochastic Processes ◽  
Test Particle ◽  
Particle Transport ◽  
Stochastic Magnetic Fields

Plasma transport in stochastic magnetic fields. Part 3. Kinetics of test particle diffusion

1983 ◽  
Vol 30 (1) ◽  
pp. 11-56 ◽  
Author(s):  
John A. Krommes ◽  
Carl Oberman ◽  
Robert G. Kleva
Keyword(s):  
Magnetic Fields ◽  
Test Particle ◽  
Scaling Laws ◽  
Direct Interaction ◽  
Stochastic Field ◽  
Common Procedure ◽  
Correlation Lengths ◽  
Direct Interaction Approximation ◽  
Stochastic Magnetic Fields ◽  
Autocorrelation Length

A discussion is given of test particle transport in the presence of specified stochastic magnetic fields, with particular emphasis on the collisional limit. Certain paradoxes and inconsistencies in the literature regarding the form of the scaling laws are resolved by carefully distinguishing a number of physically distinct correlation lengths, and thus identifying several collisional subregimes. The common procedure of averaging the conventional fluid equations over the statistics of a random field is shown to fail in some important cases because of breakdown of the Chapman-Enskog ordering in the presence of a stochastic field component with short autocorrelation length. A modified perturbation theory is introduced which leads to a Kubo-like formula valid in all collisional regimes. The direct-interaction approximation is shown to fail in the interesting limit in which the orbit exponentiation length LK appears explicitly. A higher-order renormalized kinetic theory in which LK appears naturally is discussed and used to rederive more systematically the results of the heuristic scaling arguments.

scholarly journals High energy particle transport in stochastic magnetic fields in the solar corona

2006 ◽  
Vol 462 (3) ◽  
pp. 1113-1120 ◽  
Author(s):  
M. Gkioulidou ◽  
G. Zimbardo ◽  
P. Pommois ◽  
P. Veltri ◽  
L. Vlahos
Keyword(s):  
Magnetic Fields ◽  
Solar Corona ◽  
Particle Transport ◽  
High Energy ◽  
High Energy Particle ◽  
Energy Particle ◽  
Stochastic Magnetic Fields

scholarly journals Test particle transport in perturbed magnetic fields in tokamaks

1999 ◽  
Vol 6 (6) ◽  
pp. 2443-2451 ◽  
Author(s):  
M. de Rover ◽  
A. M. R. Schilham ◽  
A. Montvai ◽  
N. J. Lopes Cardozo
Keyword(s):  
Magnetic Fields ◽  
Test Particle ◽  
Particle Transport

Test-particle transport due to fluctuating magnetic fields in tokamaks

1985 ◽  
Vol 27 (11) ◽  
pp. 1217-1241 ◽  
Author(s):  
A Thyagaraja ◽  
I L Robertson ◽  
F A Haas
Keyword(s):  
Magnetic Fields ◽  
Test Particle ◽  
Particle Transport
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