Bounce resonance heating and radial transport of electrons

High-level fluctuation in the ion-cyclotron frequency range, which is difficult to be suppressed completely, has been observed in experiments of 2XIIB and TMX. Since the bounce frequency of electrons in magnetic mirrors is usually of the order of the ion-cyclotron frequency, electrons can be heated in the direction of the field line and the radial transport associated with the heating can be induced by the fluctuation. In this paper, calculations are made on the power transfer from the DCLC or the AIC mode to electrons through bounce resonance and moreover the radial transport induced by the waves is also claculated on the basis of a parabolic-well model. Analytical results are applied to experimental parameters of 2XIIB and plugs of TMX. It is found that the power transfer from the DCLC in 2XIIB is negligibly small compared with the electron-drag power, but that from the AIC in plugs of TMX can be comparable with it. A remarkable result is that the radial transport induced by these waves can be larger than the classical end-loss. It implies that the wave-enhanced radial transport can have a large influence on determination of radial profile of the ambipolar potential in plugs of tandem mirrors, especially in future experiment with high electron temperature. (Nogami, K.)