Reduction and approximation in gyrokinetics

Details Reduction and approximation in gyrokinetics Reduction and approximation in gyrokinetics

2007-02-27

arxiv.org/abs/physics/0702234v2

J. Phys. A: Math. Theor. 41 (2008) 465501

Physics

Plasma Physics

15 pages latex

Scientific paper

10.1088/1751-8113/41/46/465501

The gyrokinetics formulation of plasmas in strong magnetic fields aims at the elimination of the angle associated with the Larmor rotation of charged particles around the magnetic field lines. In a perturbative treatment or as a time-averaging procedure, gyrokinetics is in general an approximation to the true dynamics. Here we discuss the conditions under which gyrokinetics is either an approximation or an exact operation in the framework of reduction of dynamical systems with symmetry

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