Charged particle diffusive transport

Details Charged particle diffusive transport Charged particle diffusive transport

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..374..505l&link_type=abstract

High energy solar physics. AIP Conference Proceedings, Volume 374, pp. 505-518 (1996).

Physics

Electric And Magnetic Fields, Solar Magnetism, Waves, Oscillations, And Instabilities In Plasmas And Intense Beams, Plasma Simulation

Scientific paper

We consider the transport of protons in a spatially-bounded magnetized plasma containing a homogeneous distribution of Alfvén wave turbulence. The protons interact strongly with the waves via cyclotron resonance, and are in turn pitch-angle scattered and spatially diffused throughout the plasma. Upon traversing one of the boundaries, a proton escapes from the region. We solve numerically the diffusion equation describing this process for the number of trapped particles as a function of time. We find that a leaky-box approximation is in poor agreement with the exact result when the turbulence injection rate is small, which is likely the prevailing condition after particle acceleration and during subsequent transport. On the other hand, this approximation nevertheless yields acceptable results when used in acceleration models.

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