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Guiding centre trajectories in an electrostatic turbulence spectrum can be reduced to the motion of charged particles in a 2-dimensional randomly phased potential varying in time, which is known to be described by a Hamiltonian with 3/2 degrees of freedom and chaotic trajectories. In order to compute spatial diffusion, a refined model is built here to describe a broad wavenumber k(-3) spectrum with a very large number of waves in a periodic square with a box size larger than the Grusinov coherence length. The root mean square displacement is computed on a parallel CRAY T3E computer and averaged over time and 1024 initial conditions.

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Authors: REUSS J D, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);VLAD M, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);MISGUICH J H, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Article: Physics Letters A, Vol. 241 (1998) pp. 94-98
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