Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991angeo...9..442p&link_type=abstract
Annales Geophysicae (ISSN 0939-4176), vol. 9, July 1991, p. 442-448.
Physics
Beam Injection, Computerized Simulation, Electron Beams, Ionospheric Electron Density, Electromagnetic Fields, Electron Scattering, Geomagnetism
Scientific paper
The particle method (CIC) is used for the simulation of the collisionless relaxation of the cylindrically symmetric quasi-stationary electron beam injected in plasma along the geomagnetic field. The beam is assumed to be uncompensated in a charge, as well as in a current. The analytic shape of the beam equilibrium distribution function is found as a result of beam phase space mixing in collective electromagnetic fields. In nonrelativistic limit, simple analytic equations for beam characteristics in equilibrium state (density, average energy, etc.) are obtained. The results of the analytic theory turn out to be in good agreement with the results of the simulation. The results of the computer simulation are also compared to the solution of the envelope equation.
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