Hybrid particle-fluid approach to low-frequency turbulence in magnetically confined plasmas

We have developed a hybrid particle-fluid computer model for quasineutral microinstabilities in magnetically confined plasmas. The ions are treated in the fluid approximation. The electrons are taken as guiding-center macroparticles. The model has been extensively tested for frequency and fluctuation spectra. Linear and nonlinear studies of drift waves, /eta//sub i/ modes, interchange modes, and trapped electron modes have also been carried out. 4 refs., 3 figs.