Self-consistent full-wave and Fokker-Planck calculations for ion cyclotron heating in non-Maxwellian plasmas

Journal Article · Mon May 15 00:00:00 EDT 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2173629· OSTI ID:20783126

Jaeger, E F; Berry, L A; Ahern, S D; Barrett, R F; Batchelor, D B; Carter, M D; D'Azevedo, E F; Moore, R D; Harvey, R W; Myra, J R; D'Ippolito, D A; Dumont, R J; Phillips, C K; Okuda, H; Smithe, D N; Bonoli, P T; Wright, J C; Choi, M ^[1]

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1. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6169 (United States)

Magnetically confined plasmas can contain significant concentrations of nonthermal plasma particles arising from fusion reactions, neutral beam injection, and wave-driven diffusion in velocity space. Initial studies in one-dimensional and experimental results show that nonthermal energetic ions can significantly affect wave propagation and heating in the ion cyclotron range of frequencies. In addition, these ions can absorb power at high harmonics of the cyclotron frequency where conventional two-dimensional global-wave models are not valid. In this work, the all-orders global-wave solver AORSA [E. F. Jaeger et al., Phys. Rev. Lett. 90, 195001 (2003)] is generalized to treat non-Maxwellian velocity distributions. Quasilinear diffusion coefficients are derived directly from the wave fields and used to calculate energetic ion velocity distributions with the CQL3D Fokker-Planck code [R. W. Harvey and M. G. McCoy, Proceedings of the IAEA Technical Committee Meeting on Simulation and Modeling of Thermonuclear Plasmas, Montreal, Canada, 1992 (USDOC NTIS Document No. DE93002962)]. For comparison, the quasilinear coefficients can be calculated numerically by integrating the Lorentz force equations along particle orbits. Self-consistency between the wave electric field and resonant ion distribution function is achieved by iterating between the global-wave and Fokker-Planck solutions.

• OSTI ID: 20783126
• Journal Information: Physics of Plasmas, Vol. 13, Issue 5; Other Information: DOI: 10.1063/1.2173629; (c) 2006 American Institute of Physics; 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
BEAM INJECTION HEATING
COMPARATIVE EVALUATIONS
CYCLOTRON FREQUENCY
DIFFUSION
DISTRIBUTION
DISTRIBUTION FUNCTIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
FOKKER-PLANCK EQUATION
ICR HEATING
LORENTZ FORCE
MATHEMATICAL SOLUTIONS
PLASMA
PLASMA BEAM INJECTION
PLASMA CONFINEMENT
PLASMA SIMULATION
RADIATION TRANSPORT
RF SYSTEMS
TAIL IONS
TOKAMAK DEVICES
WAVE PROPAGATION