Abstract
Off-axis electron-cyclotron heating in an axisymmetric barrier mirror produces a cylindrical layer with energetic electrons, which flow through the central cell and into the end region. The layer, producing a localized bumped ambipolar potential , forms a strong shear of radial electric fields and peaked vorticity with the direction reversal of sheared flow near the peak. Intermittent vortexlike turbulent structures near the layer are suppressed in the central cell by this actively produced transverse energy-transport barrier; this results in and rises surrounded by the layer.
- Received 23 December 2005
DOI:https://doi.org/10.1103/PhysRevLett.97.055001
©2006 American Physical Society