Electromagnetic Wake of a Charged-Particle Pulse in a Plasma

Employing the hydrodynamic approach, the electromagnetic wake of a charged-particle pulse passing through a plasma is investigated. The perturbation in the magnetic field amplitude Bθ(1) which is of interest in the study of `hose' instability of the beam is evaluated. The effect of charge density profile and different velocity regimes of the beam pulse on the behavior of Bθ(1) is considered. Finally, numerical results relevant to a typical example are presented.