Landau-like damping in rotating pure electron plasmas

A numerical solution of the two-dimensional (2-D) linearized incompressible fluid equations has been used to study the response of a cylindrical pure electron plasma to an externally applied pulse. The plasma response to the pulse exhibits a nondissipative decay process. This decay is due to differential rotation of the plasma at different radii and is clearly shown by computer-generated displays of the perturbed density.