TITLE

Kinetic energy principle and neoclassical toroidal torque in tokamaks

AUTHOR(S)
Park, Jong-Kyu
PUB. DATE
November 2011
SOURCE
Physics of Plasmas;Nov2011, Vol. 18 Issue 11, p110702
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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. 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.
ACCESSION #
67538196

 

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