Summary
The stability of a neutral sheet configuration with respect to mirrorlike perturbations is analysed in the linear regime. An analytical expression for the linear growth rate of the low-frequency electromagnetic modes is derived using a simplified model for the particle orbits. Considerations on the actual mechanism of the instability are also given.
Riassunto
Si studia la stabilità di uno strato di plasma con un campo magnetico che inverte la sua direzione entro lo strato, rispetto a perturbazioni del tipo a specchio. Usando un modello semplificato per rappresentare le orbite delle particelle, si ottiene un’espressione analitica per il tasso di crescita lineare di moti elettromagnetici di bassa frequenza. Vengono inoltre svolte delle considerazioni sul meccanismo effettivo dell’instabilità trovata.
Реэюме
В линейном режиме аналиэируется неустойчивость конфигурации нейтрального листа по отнощению к эеркально-подобным воэмушениям. Испольэуя упрошенную модель для орбит частиц, выводится аналитическое выражение для скорости линейного увеличения ниэко частотных злектромагнитных мод. Также приводится рассмотрение действительного механиэма неустойчивости.
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Dobrowolny, M. Instability of a neutral sheet. Nuovo Cimento B (1965-1970) 55, 427–442 (1968). https://doi.org/10.1007/BF02711653
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DOI: https://doi.org/10.1007/BF02711653