Nonlinear excitation of long-wavelength modes in Hall plasmas

Hall plasmas with magnetized electrons and unmagnetized ions exhibit a wide range of small scale fluctuations in the lower-hybrid frequency range as well as low-frequency large scale modes. Modulational instability of lower-hybrid frequency modes is investigated in this work for typical conditions in Hall plasma devices such as magnetrons and Hall thrusters. In these conditions, the dispersion of the waves in the lower-hybrid frequency range propagating perpendicular to the external magnetic field is due to the gradients of the magnetic field and the plasma density. It is shown that such lower-hybrid modes are unstable with respect to the secondary instability of the large scale quasimode perturbations. It is suggested that the large scale slow coherent modes observed in a number of Hall plasma devices may be explained as a result of such secondary instabilities. © 2016 Author(s).

Авторы
Lakhin V.P.1 , Ilgisonis V.I. 1, 2 , Smolyakov A.I.1, 3 , Sorokina E.A. 1, 2
Редакторы
-
Журнал
Издательство
-
Номер выпуска
10
Язык
Английский
Страницы
-
Статус
Опубликовано
Подразделение
-
Номер
102304
Том
23
Год
2016
Организации
  • 1 NRC Kurchatov Institute, Kurchatov Sq. 1, Moscow, Russian Federation
  • 2 Peoples' Friendship University of Russia, Ordzhonikidze Str. 3, Moscow, Russian Federation
  • 3 University of Saskatchewan, 116 Science Place, Saskatoon, SK S7K 4J6, Canada
Ключевые слова
Hall thrusters; Magnetic fields; Magnetrons; Plasma density; Plasma devices; Plasma diagnostics; Plasma stability; External magnetic field; Frequency ranges; Long wavelength; Lower-hybrid mode; Magnetized electrons; Modulational instability; Nonlinear excitation; Secondary instability; Magnetoplasma
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3799/