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- W2787510225 abstract "This study explores the effects of plasma shaping on magnetohydrodynamic mode stability and rotational stabilization in a tokamak, including both plasma and wall resistivity. Depending upon the plasma shape, safety factor, and distance from the wall, the β-limit for rotational stabilization is given by either the resistive-plasma ideal-wall (tearing mode) limit or the ideal-plasma resistive-wall (resistive wall mode) limit. In order to explore this broad parameter space, a sharp-boundary model is developed with a realistic geometry, resonant tearing surfaces, and a resistive wall. The β-limit achievable in the presence of stabilization by rigid plasma rotation, or by an equivalent feedback control with imaginary normal-field gain, is shown to peak at specific values of elongation and triangularity. It is shown that the optimal shaping with rotation typically coincides with transitions between tearing-dominated and wall-dominated mode behavior." @default.
- W2787510225 created "2018-02-23" @default.
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- W2787510225 date "2018-01-01" @default.
- W2787510225 modified "2023-10-14" @default.
- W2787510225 title "Shaping effects on toroidal magnetohydrodynamic modes in the presence of plasma and wall resistivity" @default.
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- W2787510225 doi "https://doi.org/10.1063/1.4991873" @default.
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