Numerical studies of current generation by radio-frequency traveling waves

Charles F.F. Karney, Nathaniel J. Fisch

Research output: Contribution to journalArticlepeer-review

184 Scopus citations


By injecting radio-frequency traveling waves into a tokamak, continuous toroidal electron currents may be generated. This process is studied by numerically solving the two-dimensional Fokker-Planck equation with an added quasi-linear term. The results are compared with the one-dimensional analytic treatment of Fisch, which predicted a reduced plasma resistivity when high-phase-velocity waves are employed. It is shown that two-dimensional velocity space effects, while retaining the predicted scaling, further reduce the ratio of power dissipated to current generated by about 40%. These effects enhance the attractiveness of steady-state tokamak reactors utilizing this method of current generation.

Original languageEnglish (US)
Pages (from-to)1817-1824
Number of pages8
JournalPhysics of Fluids
Issue number9
StatePublished - 1979

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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