Stability of the ion-temperature-gradient-driven mode with negative magnetic shear

M. Uchida; S. Sen; A. Fukuyama; D. R. McCarthy

doi:10.1063/1.1616015

Stability of the ion-temperature-gradient-driven mode with negative magnetic shear

M. Uchida^*, S. Sen, A. Fukuyama, D. R. McCarthy

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4758-4762
Number of pages	5
Journal	Physics of Plasmas
Volume	10
Issue number	12
DOIs	https://doi.org/10.1063/1.1616015
Publication status	Published - Dec 2003

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10.1063/1.1616015

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title = "Stability of the ion-temperature-gradient-driven mode with negative magnetic shear",

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.",

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AU - Uchida, M.

AU - Sen, S.

AU - Fukuyama, A.

AU - McCarthy, D. R.

PY - 2003/12

Y1 - 2003/12

N2 - 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.

AB - 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.

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ER -

Stability of the ion-temperature-gradient-driven mode with negative magnetic shear

Abstract

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