Hybrid Simulations of Low-frequency Oscillations in Field-Reversed Configurations

We report on progress in developing a kinetic-ion, fluid-electron simulation code to simulate low-frequency ($\sim \omega_{ci}$) phenomena in field-reversed configuration (FRC) plasmas. The code retains inductive and electrostatic fields, but neglects radiation and advances electrons implicitly to allow for longer timesteps. The phenomena of interest include fast-ion-driven Alfvenic modes as well as the interaction of an FRC with an external rotating magnetic field (RMF).