Kinetic Energy Principle And Neoclassical Toroidal Torque In Tokamaks
Authors: Jong-Kyu Park
Abstract:
It is shown that when tokamaks are perturbed the kinetic energy principle is closely related to
the neoclassical toroidal torque by the action invariance of particles. Especially when tokamaks
are perturbed from scalar pressure equilibria, the imaginary part of the potential energy in the
kinetic energy principle is equivalent to the toroidal torque by the Neoclassical Toroidal Viscosity
(NTV). A unified description therefore should be made for both physics. It is also shown in this
case that the potential energy operator can be self-adjoint and thus the stability calculation can
be simplified by minimizing the potential energy.
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Submitted to:
Physics of Plasmas (September 2011)
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Download PPPL-4706 (pdf 266 KB 10 pp)
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