Abstract
The influence of ion temperature fluctuations on the stability of resistive drift and ballooning modes is investigated using a two-fluid model. The eigenmode equations are derived and solved analytically in a low beta model equilibrium. Parameters relevant to low-confinement-mode (L-mode) edge plasmas from the Texas Experimental Tokamak (TEXT) [Phys. Fluids B 2, 2879 (1990)] are used. The resistive modes are found to be destabilized by ion temperature fluctuations over a broad range of mode numbers. The scaling of the growth rate with magnetic shear, ηi(Ln/LTi) and the mode number is elucidated.
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