Lawrence Berkeley National Laboratory
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  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.