Deceleration of an ion-beam in a strongly magnetised plasma

The collisional relaxation of an ion-beam in a plasma with an extremely strong magnetic field (approximately 1013G) is considered. The presence of a drift of the background electrons with respect to the background ions is included, giving rise to enhanced ion-sound fluctuations. The influence of the magnetic field on the orbit of the beam-ions to scatter off the enhanced fluctuations. Once deflected from their motion parallel to the field the beam-ions undergo a relatively rapid collisional relaxation. (author)