Test particle transport in perturbed magnetic fields in tokamaks | Zendy

Machiel de Rover | Zendy; Arnold M. R. Schilham | Zendy; A. Montvai | Zendy; N.J. Lopes Cardozo | Zendy

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Test particle transport in perturbed magnetic fields in tokamaks

Author(s) -

Machiel de Rover,

Arnold M. R. Schilham,

A. Montvai,

N.J. Lopes Cardozo

Publication year - 1999

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.873516

Subject(s) - physics , tokamak , magnetic field , field line , test particle , statistical physics , field (mathematics) , plasma , decorrelation , quantum electrodynamics , chaotic , computational physics , classical mechanics , quantum mechanics , mathematics , algorithm , artificial intelligence , computer science , pure mathematics

Numerical calculations of magnetic field line trajectories in a tokamak are used to investigate the common hypotheses that (i) field lines in a chaotic field make a Gaussian random walk and (ii) that the poloidal component of the magnetic field is uniform in regions with a chaotic magnetic field. Both hypotheses are found invalid in typical tokamak conditions. A test particle transport model in the so-called "collisionless diffusion" limit is presented, based on the field line excursions in numerical simulations. Decorrelation mechanisms that effectively enhance the transport in a stochastic field are investigated. (C) 1999 American Institute of Physics. [S1070-664X(99)02406-4]

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