8.宇宙空間プラズマの非線形波動(<小特集>極限プラズマII)

概要

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The space plasma states are essentially subjected to the nonlinear wave particle interaction processes which are devided into two categories; the first is large amplitude magnetohydro dynamic processes and the second is the nonlinear wave-particle interaction processes which can be described with the weak turbulence theory. Since early 1970, evidences of the nonlinear ESCH (Electrostatic Cyclotron Harmonic) wave processes have been discovered. The recent subjects of the studies on the nonlinear wave-particle interaction processes are the broadband electrostatic noise (BEN). In the magnetospheric tail region being concentrated in the plasma sheet boundary layer and also in the polar region plasma, the essential physical processes of BEN phenomena are disclosed by accurate observation using the scientific satellites Akebono and Sakigake, to be wave-particle interactions with higher order nonlinear stage due to strong coupling between the waves and ion and electron beams. These features of the nonlinear processes show that the space plasma is in one of typical stage of extreme plasma.
社団法人プラズマ・核融合学会の論文
1994-05-25