RESONANT PARTICLE EFFECTS IN ENERGY TRANSPORT BY WAVE PACKETS
Energy transport is calculated for longitudinal and transverse electron wave packets propagating in a homogeneous collisionless plasma along a static B-field. Linear wave theory is insufficient; also the second order longitudinal E-field of a wave is needed to determine its energy density. This is found to depend on the ratio between the Landau damping time and the time-of-flight of a resonant electron through the wave packet. When this ratio is small the electronic part of the wave energy density is equal and opposite to the field energy density. When the ratio is large the energy of each wave packet propagates in two separate lumps at the group velocity and at the velocity of resonant electrons. In this case the energy density of the first lump agrees with the well known formula in terms of the dielectric tensor. The total energy of a wave packet, including the contribution of resonant electrons, is conserved in any case.
Bibliographic Reference: TRIESTE WORKSHOP ON MATHEMATICAL ASPECTS OF FLUID AND PLASMA DYNAMICS, TRIESTE (ITALY), MAY 30-JUNE 2, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31707 ORA
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Record Number: 1989123013300 / Last updated on: 1987-01-01
Available languages: en