Pitch-angle diffusion of ring current protons caused by electrostatic ion loss-cone waves |
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| Authors: | Kjell Rönnmark |
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| Institution: | 1. Department of Plasma Physics, University of Umeå, S-901 87 Umeå, Sweden;2. Kiruna Geophysical Institute, S-981 01 Kiruna, Sweden |
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| Abstract: | Pitch-angle diffusion of ring current protons is investigated, assuming that the scattering is caused by resonant interaction with electrostatic ion loss-cone waves. Bounce averaged diffusion coefficients are presented for different wave energy distributions. It is found that wave amplitudes about 1 mV/m are required to give strong diffusion of protons with average energy. |
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