Current-diffusive ballooning mode in low shear and negative shear regions of tokamaks

Masatoshi Yagi; Kimitaka Itoh; Sanae Itoh; Atsushi Fukuyama; Masafumi Azumi

doi:10.1143/JPSJ.63.10

Current-diffusive ballooning mode in low shear and negative shear regions of tokamaks

Masatoshi Yagi, Kimitaka Itoh, Sanae Itoh, Atsushi Fukuyama, Masafumi Azumi

Division of Nuclear Fusion Dynamics

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11 Citations (Scopus)

Abstract

The stability of the current-diffusive ballooning mode in tokamaks with high toroidal mode number is analyzed in the region of second stability against the ideal magnetohydrodynamic mode. It is found that the growth rate of the current-diffusive ballooning mode is decreased upon the reduction of the geodesic curvature driving force. The reduction of thermal conductivity in the limit of very weak shear or negative shear in comparision with standard shear is also shown.

Original language	English
Pages (from-to)	10-13
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	63
Issue number	1
DOIs	https://doi.org/10.1143/JPSJ.63.10
Publication status	Published - Jan 1 1994

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.63.10

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AU - Fukuyama, Atsushi

AU - Azumi, Masafumi

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AB - The stability of the current-diffusive ballooning mode in tokamaks with high toroidal mode number is analyzed in the region of second stability against the ideal magnetohydrodynamic mode. It is found that the growth rate of the current-diffusive ballooning mode is decreased upon the reduction of the geodesic curvature driving force. The reduction of thermal conductivity in the limit of very weak shear or negative shear in comparision with standard shear is also shown.

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Current-diffusive ballooning mode in low shear and negative shear regions of tokamaks

Abstract

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