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Кинетическая модель аксиально-симметричных магнитных дыр суб-ионного масштаба.дипломная работа (Бакалавр)
- Научный руководитель: Юшков Е.В.
- Автор: П.И. Шустов
- Тип: Бакалавр
- Организация, в которой проходила защита: МГУ имени М.В. Ломоносова
- Год защиты: 2017
- Аннотация: This investigation is devoted to kinetic models of cylindrically symmetric magnetic holes with sub-ion scales.Using two types of charged particle distribution functions, we construct electromagnetic field configurations in magnetic holes supported by electron azimuthal drift and electron thermal anisotropy. We demonstrate that magnetic holes embedded into background plasma have characteristics of electromagnetic field very similar to recent spacecraft observations in the Earth magnetosphere: both localized electron currents and strong electric fields are found in the magnetic hole boundary. This electric field is an intrinsic property of cylindrical magnetic holes. We show that ion currents included into the model produce the second spatial scale of the hole boundary for realistic system parameters. We obtain a useful dependence of magnetic hole depth (i.e., an amplitude of magnetic field depression) on magnetic hole radius (scale width between the hole symmetry axis and the hole boundary). Possible applications of model results are discussed.
- Добавил в систему: Юшков Егор Владиславович