TY - JOUR

T1 - Tearing mode instability due to anomalous resistivity near edge

AU - Furuya, A.

AU - Itoh, S. I.

AU - Yagi, M.

PY - 2000

Y1 - 2000

N2 - Tearing mode instability in the presence of microscopic turbulence is investigated. The effects of microscopic turbulence on tearing mode are taken as drags which are calculated by one-point renormalization method and mean-field approximation. These effects are reduced to effective diffusivities in reduced MHD equations. Using these equations, the stability analyses of the tearing mode are performed. It is shown that a finite amplitude of fluctuation enhances the growth rate of tearing mode. For very high values of turbulent diffusivities, marginally stable state exists. The effects of each turbulent diffusivity on mode stability are examined near marginal stability boundary. Parameter dependence of the resistive ballooning mode turbulence on tearing mode is analyzed as an example.

AB - Tearing mode instability in the presence of microscopic turbulence is investigated. The effects of microscopic turbulence on tearing mode are taken as drags which are calculated by one-point renormalization method and mean-field approximation. These effects are reduced to effective diffusivities in reduced MHD equations. Using these equations, the stability analyses of the tearing mode are performed. It is shown that a finite amplitude of fluctuation enhances the growth rate of tearing mode. For very high values of turbulent diffusivities, marginally stable state exists. The effects of each turbulent diffusivity on mode stability are examined near marginal stability boundary. Parameter dependence of the resistive ballooning mode turbulence on tearing mode is analyzed as an example.

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U2 - 10.1002/1521-3986(200006)40:3/4<375::aid-ctpp375>3.0.co;2-i

DO - 10.1002/1521-3986(200006)40:3/4<375::aid-ctpp375>3.0.co;2-i

M3 - Article

AN - SCOPUS:0034418025

SN - 0863-1042

VL - 40

SP - 375

EP - 380

JO - Contributions to Plasma Physics

JF - Contributions to Plasma Physics

IS - 3-4

ER -