Grad-Shafranov equation
= Grad-Shafranov equation
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{wiki=Grad–Shafranov_equation}
The Grad-Shafranov equation governs the poloidal magnetic flux of an axisymmetric magnetohydrostatic equilibrium. Pressure and toroidal-field contributions depend on the flux function. The <Grad-Shafranov equation for a force-free magnetic field> is its zero-pressure-gradient reduction.