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| Paper IPM / Physic / 7317 |
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Nonlinear interactions between electromagnetic electron cyclotron(EMEC) waves and ion-acoustic perturbations involving non-isothermal electrons and cold inertial ions are considered. Following standard methods, a reduce wave equation for the slowly varying EMEC wave envelope is derived, including nolinear effects associated with relativistic electron mass variation and electron density changes caused by the EMEC ponderomotive force and trapped electrons in the ion-acousitc perturbations which modulate the EMEC waves. The governing equations are employed to investigate the influence of trapped electrons on the modulationalinstability and envelope EMEC solitions. It is found that the static magnetic field intensifies the reduction of the growth rate, and makes the conditions for constructing localized envelope solition solutions harder.
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