Title
Correlation between electron transport and shear alfvén activity in the national spherical torus experiment
Date Issued
18 March 2009
Access level
metadata only access
Resource Type
journal article
Author(s)
Stutman D.
Gorelenkov N.
Finkenthal M.
Fredrickson E.
Kaye S.
Mazzucato E.
Tritz K.
Johns Hopkins University
Abstract
We report the observation of a correlation between shear Alfvén eigenmode activity and electron transport in plasma regimes where the electron temperature gradient is flat, and thus the drive for temperature gradient microinstabilities is absent. Plasmas having rapid central electron transport show intense, broadband global Alfvén eigenmode (GAE) activity in the 0.5-1.1 MHz range, while plasmas with low transport are essentially GAE-free. The first theoretical assessment of a GAE-electron transport connection indicates that overlapping modes can resonantly couple to the bulk thermal electrons and induce their stochastic diffusion. © 2009 The American Physical Society.
Volume
102
Issue
11
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Electroquímica
Scopus EID
2-s2.0-63049135673
Source
Physical Review Letters
ISSN of the container
10797114
Sources of information:
Directorio de Producción Científica
Scopus