Stability of the Ion-temperature-gradient-driven Mode with Negative Magnetic Shear
Date
2003
Authors
Uchida, Nobuya
Sen, Sudip
Fukuyama, A
McCarthy, Daniel R
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics (AIP)
Abstract
A model for transition to the enhanced reverse shear (ERS) or negative central shear (NCS) mode triggered ion tokamaks is presented. Studies show that when the magnetic shear has the same sign as the second derivative of the parallel velocity with respect to the radial coordinate, the ITG mode may become more unstable. On the other hand, when the magnetic shear has the opposite sign to the second derivative of the parallel velocity, the ITG mode may be completely stabilized.
Description
Keywords
Keywords: Computer simulation; Current density; Eigenvalues and eigenfunctions; Electron transitions; Magnetic field effects; Plasma confinement; Plasma heating; Plasma turbulence; Shear stress; Temperature; Thermal gradients; Tokamak devices; Electron dynamics; En
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Source
Physics of Plasmas
Type
Journal article