Week 5-6: Single-particle motion in uniform E and B fields, Gravitaional field, Single-particle motion in nonuniform B field, Grad-B Drift and Curvature Drift.

 

In this and in the following lecturers we investigate the motion of charged particles in the presence of electric and magnetic fields known as functions of position and time. Thus, the electric and magnetic fields are assumed to be prescribed and are not affected by the charged particles. This week, in particular, considers the fields to be constant in time and spatially uniform. This subject is considered in some detail, since many of the more complex situations, considered in next lecturers, can be treated as perturbations to this problem. The study of the motion of charged particles in specified fields is important, since it provides a good physical insight for understanding some of the dynamic processes in plasmas. It also facilitates obtaining information on some macroscopic phenomena that are due to the collective behavior of a large number of particles. Not all of the components of the detailed microscopic particle motion contribute to macroscopic effects, but it is possible to isolate the components of the individual motion that contribute to the collective plasma behavior.