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Stability of the Ion-temperature-gradient-driven Mode with Negative Magnetic Shear

Uchida, Nobuya; Sen, Sudip; Fukuyama, A; McCarthy, Daniel R

Description

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.

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
URI: http://hdl.handle.net/1885/87845
Source: Physics of Plasmas
DOI: 10.1063/1.1616015

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