Quasilinear theory of interchange modes in a closed field line configuration
نویسندگان
چکیده
منابع مشابه
Electrostatic drift modes in a closed field line configuration
The stability of electrostatic drift waves in a closed field line configuration in collisionality regimes ranging from collisional to collisionless is compared. The maximum sustainable pressure gradient is found to be dependent on the ratio of the temperature and density gradients (h[d ln T/d ln n). The eigenmodes are seen to be flute-like. The stability boundary was found to be similar when bo...
متن کاملTransition from drift to interchange instabilities in an open magnetic field line configuration
The transition from a regime dominated by drift instabilities to a regime dominated by pure interchange instabilities is investigated and characterized in the simple magnetized toroidal device TORPEX TORoidal Plasma EXperiment, A. Fasoli et al., Phys. of Plasmas 13, 055906 2006 . The magnetic field lines are helical, with a dominant toroidal component and a smaller vertical component. Instabili...
متن کاملInterchange modes in a collisional plasma
Gross plasma stability can derive from plasma compressibility in the bad curvature regions of closed field line systems. In this situation magnetohydrodynamic ~MHD! theory predicts that the maximum pressure gradient that is stable is proportional to g , the ratio of specific heats. This article will examine the accuracy of the MHD prediction for electrostatic interchange modes using kinetic the...
متن کاملSmall-scale turbulence in a closed-field-line geometry.
Plasma turbulence due to small-scale entropy modes is studied with gyrokinetic simulations in a simple closed-field-line geometry, the Z pinch, in low-beta parameter regimes that are stable to ideal interchange modes. We find an enormous variation in the nonlinear dynamics and particle transport as a function of two main parameters, the density gradient and the plasma collisionality. This varia...
متن کاملDilaton Deformations in Closed String Field Theory
The dilaton theorem implies that the contribution to the dilaton potential from cubic interactions of all levels must be cancelled by the elementary quartic self-coupling of dilatons. We use this expectation to test the quartic structure of closed string field theory and to study the rules for level expansion. We explain how to use the results of Moeller to compute quartic interactions of state...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2007
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.2773711