MGNETOSONIC SOLITARY WAVES IN HOT PLASMAS

In this paper, a magnetosonic solitary wave in hot plasma is considered both analytically and numerically,taking account of the charge separation. The two-direction one-dimension Maxwell-two-fluid equations are obtained,.It is shown that there.exist solitary wave. solutions of these equations when 1+B₀²/4πn₀T_e < (C/C_S)² <2.6, where C is the-wave velocity. The distributions of density and of magnetic intensity both have the shape of single peak. The effect of the magnetic field is to depress the amplitudes and to widen the widths of the solitary waves; and when B_O→0 the magnetosonic solitary wave turn to sonic solitary wave. It is found that for large C the charge separation may be remarkable, so the assumption of quasineutrality is incorrect.