Affordable Access

Faster-than-Bohm cross-B electron transport in strongly pulsed plasmas.

Authors
Type
Published Article
Journal
Physical Review Letters
1079-7114
Publisher
American Physical Society
Publication Date
Volume
103
Issue
22
Pages
225003–225003
Identifiers
PMID: 20366102
Source
Medline
License
Unknown

Abstract

We report the empirical discovery of an exceptionally high cross-B electron transport rate in magnetized plasmas, in which transverse currents are driven with abruptly applied high power. Experiments in three different magnetic geometries are analyzed, covering several orders of magnitude in plasma density, magnetic field strength, and ion mass. It is demonstrated that a suitable normalization parameter is the dimensionless product of the electron (angular) gyrofrequency and the effective electron-ion momentum transfer time, omega(ge)tau(EFF), by which all of diffusion, cross-resistivity, cross-B current conduction, and magnetic field diffusion can be expressed. The experiments show a remarkable consistency and yield close to a factor of 5 greater than the Bohm-equivalent values of diffusion coefficient D(perpendicular), magnetic-diffusion coefficient D(B), Pedersen conductivity sigma(P), and transverse resistivity eta(perpendicular).

Statistics

Seen <100 times