Trapped-Electron Mode in Cylindrical Geometry

Abstract

The theory of the cylindrical-geometry analog to the toroidal trapped-electron-scattering mode has been developed, and the resulting equations have been solved numerically. Observations of oscillations occurring near the electron bounce frequency have been made in a plasma confined by a spatially periodic magnetic field. These oscillations were found to be low-amplitude, high-mode-number, drift-type modes having properties consistent with theoretical predictions.