Ion heating and acceleration by strong magnetosonic waves

Details Ion heating and acceleration by strong magnetosonic waves Ion heating and acceleration by strong magnetosonic waves

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..51..264l&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 51, July 25, 1983, p. 264-267.

Physics

36

Ion Temperature, Magnetoacoustic Waves, Particle Acceleration, Plasma Heating, Computerized Simulation, Elementary Particle Interactions, Magnetohydrodynamic Waves, Polarization (Charge Separation), Trapped Particles, Wave Attenuation

Scientific paper

The acceleration of ions and the associated plasma heating by intense magnetosonic waves (but not shock waves) propagating perpendicularly to a magnetic field are studied. Simulations were performed using a 1 2/2-dimensional, fully electromagnetic, relativistic particle code with both ions and electrons combined with finite-size particle techniques. Strong acceleration and heating of ions occur once the wave reaches an amplitude where ion trapping takes place. This heating is associated with an acceleration of the trapped ions in the y-direction due to the ev(vector)p x B(vector)/c force which continues until ev(vector)y x B(vector)/c is large enough to detrap them. Ion temperatures in the x and y directions oscillate in time due to the ion-cyclotron motion. The heated ions produce a long flat tail on the ion distribution function with a maximum velocity about 2.5 times the Alfven velocity. The electrons show negligible heating, responding adiabatically, and the ions acquire a net drift in the y direction.

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