The circuit equations for current drive are derived by the finding of appropriate response functions in the presence of an electric field. The effect of arbitrary wave-induced fluxes on runaway production and current generation can then be determined. An interpretation of recent remarkable experiments is now possible, and the favorable results appear to scale to reactor-grade devices.

• Received 9 July 1984

DOI:https://doi.org/10.1103/PhysRevLett.54.897