Three-dimensional, electromagnetic computer simulation experiments are presented showing the evolution of plasma columns subjected to external electric and magnetic fields. The results of two experiments are presented here. In the first, self-confinement is achieved; in the second, as instability arises which drives the plasma into a helical configuration.

• Received 3 April 1978

DOI:https://doi.org/10.1103/PhysRevLett.42.1274