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Open Access Publications from the University of California

Variational formulation of kinetic-bulk multiple-wave conversion in fusion plasmas

  • Author(s): Brizard, A.J.;
  • Kaufman, A.N.;
  • Tracy, E.R.
  • et al.

We present a variational formulation of a generic multiple-wave conversion process [1] between a kinetic-ion plasma wave, supported by a non-Maxwellian distribution of energetic particles, and one or two plasma waves supported by bulk-ions with Maxwellian distributions. The variational approach yields important conservation laws (e.g., action), that help us understand how rf power is exchanged between the bulk-ion species and the kinetic-ion species. We also discuss the implications of a kinetic-ion plasma wave with negative energy on the multiple-wave conversion process.

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