Effective diffusion and nonlocal heat transport in a stochastic magnetic field

Journal Article · Mon Mar 09 04:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.1523· OSTI ID:7205663

Rax, J M; White, R B ^[1]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08540 (United States)

Heat transport in a stochastic magnetic-field configuration is investigated analytically and numerically with two complementary models: a Chirikov-Taylor map model and a Gaussian random-field model. Numerical solution of the Chirikov-Taylor model shows a short-time nonlocal regime, but at large time the Rechester-Rosenbluth effective diffusion regime is confirmed numerically. The Gaussian model, for which the associated nonlocal propagator is calculated, describes this short-time behavior.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7205663
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:10; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310 -- Plasma Confinement-- (1992-)
700330* -- Plasma Kinetics
Transport
& Impurities-- (1992-)
ANALYTICAL SOLUTION
CONFINEMENT
DATA
DIFFUSION
ENERGY TRANSFER
FUNCTIONALS
FUNCTIONS
GAUSS FUNCTION
HEAT TRANSFER
INFORMATION
LARMOR RADIUS
MAGNETIC FIELDS
MEAN FREE PATH
NUMERICAL DATA
NUMERICAL SOLUTION
PLASMA
PLASMA CONFINEMENT
PROPAGATOR
RANDOMNESS
STOCHASTIC PROCESSES
THEORETICAL DATA
TIME DEPENDENCE