Simulations of cosmic-ray particle diffusion

Details Simulations of cosmic-ray particle diffusion Simulations of cosmic-ray particle diffusion

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.104..357u&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 104, no. 2, Sept. 1984, p. 357-366.

Astronomy and Astrophysics

Astrophysics

1

Computerized Simulation, Cosmic Rays, Particle Diffusion, Particle Trajectories, Charged Particles, Magnetic Fields, Power Spectra

Scientific paper

The diffusion of charged particles in a stochastic magnetic field (strength B') which is superimposed on a uniform magnetic field B0k is studied. A slab model of the stochastic magnetic field is used. Many particles were released into different realizations of the magnetic field and their subsequent displacements Δz in the direction of the uniform magnetic field were numerically computed. The particle trajectories were calculated over periods of many particles scattering times. The ensemble average >(Δz)2< was then used to find the parallel diffusion coefficient. The simulations were performed for several types of stochastic magnetic fields and for a wide range of particle gyro-radius and the parameter B'/B0. The calculations have shown that the theory of charged particle diffusion is a good approximation even when the stochastic magnetic field is of the same strength as the uniform magnetic field.

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