Gravity damping of Alfvén waves: numerical modelling

Details Gravity damping of Alfvén waves: numerical modelling Gravity damping of Alfvén waves: numerical modelling

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..503m&link_type=abstract

8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

Estimates of Alfven wave dissipation in the fluid approximation have been in the literature for years. Here we report on a numerical study of Alfven wave dissipation in a non-fluid context. We consider a nearly collisionless magnetized plasma. A test particle moves in this medium in the presence of an Alfven wave propagating along a vertical field line in the presence of gravity. The model includes the randomizing effects of collisions which occur infrequently enough that the particle undergoes many gyrations between successive collisions. Our results indicate that the test particle gains energy from the wave at a rate which is larger than the linear predictions of Khabibrakhmanov and Mullan (1994).

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