Vlasov-Maxwell kinetic simulations of radio-frequency-driven ion flows in magnetized plasmas

The generation of a coherent ion flow due to the injection in a plasma of a purely electrostatic wave of finiteamplitude, propagating at right angle with the ambient uniform magnetic field, is investigated making use of akinetic code which solves the fully nonlinear Vlasov equations for electrons and ions, coupled with theMaxwell equations, in one spatial and two velocity dimensions. A uniformly magnetized slab plasma isconsidered. The wave frequency is assumed in the range of the fourth harmonic of the ion cyclotron frequency,and the wave vector is chosen in order to model the propagation of an ion Bernstein wave. The computation ofthe first-order moment of the ion distribution function shows that indeed a quasistationary transverse averageion drift velocity is produced. The time evolution of the ion distribution function undergoes a resonant interaction of Cherenkov type, even if the plasma ions are magnetized. During the waveplasmainteraction, the electron distribution function remains Gaussian-like, while increasing its energy content.