ICRF H-mode coupling and heating in BPX and JET

ICRF coil launcher coupling to BPX density and temperature profiles is considered. The dependence of the ICRF launcher radiation resistance on the density profile and its gradient is studied. Our ANTIMP cavity code as well as a modified Brambilla code are used to examine the coupling. For BPX, we find that the radiation resistance decreases by a factor of about two during the L- to H-mode transition. The use of four coax end-feeds to drive each coil for H-mode coupling is found to increase the radiation resistance as compared to a two-feed case. The problems of fundamental minority 3He and D heating scenarios are addressed for BPX utilizing XWAVE, a code which treats full wave effects including reflection, mode conversion and absorption. The power conservation relation follows from a definition of local power absorption and a companion general expression for kinetic flux based on fundamental principles. Wave absorption, reflection and mode conversion for possible scenarios including fundamental deuterium or 3He are presented. (author) 4 refs., 4 figs