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Title: Self-Consistent Full-Wave and Fokker-Planck Calculations for Ion Cyclotron Heating in Non-Maxwellian Plasmas

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [4];  [5];  [5];  [6];  [7];  [7];  [8]
  1. ORNL
  2. CompX, Del Mar, CA
  3. Lodestar Research Corporation
  4. CEA, Cadarache, France
  5. Princeton Plasma Physics Laboratory (PPPL)
  6. Tech-X Corporation
  7. Massachusetts Institute of Technology (MIT)
  8. General Atomics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
978258
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13
Country of Publication:
United States
Language:
English

Citation Formats

Jaeger, Erwin Frederick, Berry, Lee A, Ahern, Sean, Barrett, Richard F, Batchelor, Donald B, Carter, Mark Dwain, D'Azevedo, Ed F, Moore, Ryan D, Harvey, R. W., Myra, J. R., D'Ippolito, D. A., Dumont, R. J., Phillips, Cynthia, Okuda, H., Smithe, D. N., Bonoli, P. T., Wright, J. C., and Choi, M. Self-Consistent Full-Wave and Fokker-Planck Calculations for Ion Cyclotron Heating in Non-Maxwellian Plasmas. United States: N. p., 2006. Web. doi:10.1063/1.2173629.
Jaeger, Erwin Frederick, Berry, Lee A, Ahern, Sean, Barrett, Richard F, Batchelor, Donald B, Carter, Mark Dwain, D'Azevedo, Ed F, Moore, Ryan D, Harvey, R. W., Myra, J. R., D'Ippolito, D. A., Dumont, R. J., Phillips, Cynthia, Okuda, H., Smithe, D. N., Bonoli, P. T., Wright, J. C., & Choi, M. Self-Consistent Full-Wave and Fokker-Planck Calculations for Ion Cyclotron Heating in Non-Maxwellian Plasmas. United States. doi:10.1063/1.2173629.
Jaeger, Erwin Frederick, Berry, Lee A, Ahern, Sean, Barrett, Richard F, Batchelor, Donald B, Carter, Mark Dwain, D'Azevedo, Ed F, Moore, Ryan D, Harvey, R. W., Myra, J. R., D'Ippolito, D. A., Dumont, R. J., Phillips, Cynthia, Okuda, H., Smithe, D. N., Bonoli, P. T., Wright, J. C., and Choi, M. Mon . "Self-Consistent Full-Wave and Fokker-Planck Calculations for Ion Cyclotron Heating in Non-Maxwellian Plasmas". United States. doi:10.1063/1.2173629.
@article{osti_978258,
title = {Self-Consistent Full-Wave and Fokker-Planck Calculations for Ion Cyclotron Heating in Non-Maxwellian Plasmas},
author = {Jaeger, Erwin Frederick and Berry, Lee A and Ahern, Sean and Barrett, Richard F and Batchelor, Donald B and Carter, Mark Dwain and D'Azevedo, Ed F and Moore, Ryan D and Harvey, R. W. and Myra, J. R. and D'Ippolito, D. A. and Dumont, R. J. and Phillips, Cynthia and Okuda, H. and Smithe, D. N. and Bonoli, P. T. and Wright, J. C. and Choi, M.},
abstractNote = {},
doi = {10.1063/1.2173629},
journal = {Physics of Plasmas},
number = ,
volume = 13,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}
  • Self-consistent solutions for the wave electric field and particle distribution function are calculated for ion cyclotron heating in non-Maxwellian plasmas. The all-orders wave solver AORSA is generalized to treat non-thermal velocity distributions arising from fusion reactions, neutral beam injection, and wave driven diffusion in velocity space. Quasi-linear diffusion coefficients are derived directly from the wave electric fields and used to calculate velocity distribution functions with the CQL3D Fokker-Planck code. Self-consistent results are obtained by iterating the full-wave and Fokker-Planck solutions.
  • 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 diffusionmore » 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.« less
  • The nonlocal power absorption of trapped ions in ion cyclotron radio-frequency heating is calculated for several non-Maxwellian distribution functions by keeping the full particle orbit and wave coupling. For slowing down distribution the finite Larmor radius effect enhances the power absorption in higher harmonic heating with [ital n][ge]2. In bi-Maxwellian plasma the absorption of trapped ions increases with the power of the ratio of the thermal perpendicular energy to the thermal parallel energy in the infinite aspect ratio limit and is slower in the small inverse aspect ratio case.