Anomalous Slowing of a Perpendicularly Injected Ion Beam in Both Quasilinear and Trapping Regimes

Abstract
The anomalous slowing of an ion beam injected perpendicularly to the confining magnetic field of a low-β plasma is experimentally verified in the nonlinear stages of the excited lower-hybrid instability. Furthermore, a transition of the main nonlinear mechanism from the quasilinear to the particle-trapping regime is demonstrated by varying beam parameters.