Vlasov versus reduced kinetic theories for helically symmetric equilibria

Journal Article · Mon Apr 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4792266· OSTI ID:22130449

Tasso, H. ^[1]; Throumoulopoulos, G. N. ^[2]

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1. Max-Planck-Institut fuer Plasmaphysik, Euratom Association, D-85748 Garching (Germany)
2. University of Ioannina, Association Euratom-Hellenic Republic, Section of Theoretical Physics, GR 451 10 Ioannina (Greece)

A new constant of motion for helically symmetric equilibria in the vicinity of the magnetic axis is obtained in the framework of Vlasov theory. In view of this constant of motion the Vlasov theory is compared with drift kinetic and gyrokinetic theories near axis. It turns out that as in the case of axisymmetric equilibria [H. Tasso and G. N. Throumoulopoulos, Phys. Plasmas 18, 064507 (2011)] the Vlasov current density thereon can differ appreciably from the drift kinetic and gyrokinetic current densities. This indicates some limitation on the implications of reduced kinetic theories, in particular, as concerns the physics of energetic particles in the central region of magnetically confined plasmas.

• OSTI ID: 22130449
• Journal Information: Physics of Plasmas, Vol. 20, Issue 4; Other Information: (c) 2013 U.S. Government; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
BOLTZMANN-VLASOV EQUATION
COMPARATIVE EVALUATIONS
CURRENT DENSITY
EQUILIBRIUM
MAGNETOHYDRODYNAMICS
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA SIMULATION