Percolation scaling for transport in turbulent plasmas
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.
Bibliographic Reference: Article: Physics Letters A, Vol. 241 (1998) pp. 94-98
Record Number: 199810826 / Last updated on: 1998-07-20
Original language: en
Available languages: en