Continuum modes in rotating plasmas: General equations and continuous spectra for large aspect ratio tokamaks

A theory for localized low-frequency ideal magnetohydrodynamical (MHD) modes in axisymmetric toroidal systems is generalized to take into account both toroidal and poloidal equilibrium plasma flows. The general set of equations describing the coupling of shear Alfvén and slow (sound) modes and defining the continuous spectrum of rotating plasmas in axisymmetric toroidal systems is derived. The equations are applied to study the continuous spectra in large aspect ratio tokamaks. The unstable continuous modes in the case of predominantly poloidal plasma rotation with the angular velocity exceeding the sound frequency are found. Their stabilization by the shear Alfvén coupling effect is studied. © 2011 American Institute of Physics.

Авторы
Lakhin V.P.1 , Ilgisonis V.I. 1, 2
Редакторы
-
Журнал
Издательство
-
Номер выпуска
9
Язык
Английский
Страницы
-
Статус
Опубликовано
Подразделение
-
Номер
092103
Том
18
Год
2011
Организации
  • 1 NRC Kurchatov Institute, 1 Kurchatov Sqr., Moscow 123182, Russian Federation
  • 2 People's Friendship University of Russia, 3 Ordzhonikidze Str., Moscow 117198, Russian Federation
Ключевые слова
Aspect ratio; Magnetoplasma; Plasma confinement; Shear flow; Continuous spectrum; Continuum modes; Coupling effect; Equilibrium plasma; General equations; Large aspect ratio; Plasma rotations; Rotating plasmas; Magnetohydrodynamics
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/2615/