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Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges

Abstract

Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly ({approx_equal}3 ms), during a slow ({approx_equal}200 ms) self-inductive evolution of the magnetic shear. This crucial observation, and the correlation of the transition with the time and location of the magnetic shear reversal, lend support to models attributing the reduced transport to the local properties of a zero-shear region, in contrast to models predicting a gradual reduction due to a weak or negative shear.
Authors:
Henderson, M A; Camenen, Y; Coda, S; Goodman, T P; Nikkola, P; Pochelon, A; Sauter, O [1] 
  1. Centre de Recherches en Physique des Plasmas - Ecole Polytechnique Federale de Lausanne, Association EURATOM - Confederation Suisse, CH-1015 Lausanne (Switzerland)
Publication Date:
Nov 19, 2004
Product Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 93; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.93.215001; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); TCV Team; PBD: 19 Nov 2004
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED-PARTICLE TRANSPORT; CORRELATIONS; ELECTRIC DISCHARGES; ELECTRONS; EVOLUTION; PLASMA; PLASMA CONFINEMENT; SHEAR; TCV TOKAMAK
OSTI ID:
20619366
Country of Origin:
United States
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US05A5750062871
Submitting Site:
INIS
Size:
page(s) 215001-215001.4
Announcement Date:
Aug 21, 2005

Citation Formats

Henderson, M A, Camenen, Y, Coda, S, Goodman, T P, Nikkola, P, Pochelon, A, and Sauter, O. Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges. United States: N. p., 2004. Web. doi:10.1103/PhysRevLett.93.215001.
Henderson, M A, Camenen, Y, Coda, S, Goodman, T P, Nikkola, P, Pochelon, A, & Sauter, O. Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges. United States. https://doi.org/10.1103/PhysRevLett.93.215001
Henderson, M A, Camenen, Y, Coda, S, Goodman, T P, Nikkola, P, Pochelon, A, and Sauter, O. 2004. "Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges." United States. https://doi.org/10.1103/PhysRevLett.93.215001.
@misc{etde_20619366,
title = {Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges}
author = {Henderson, M A, Camenen, Y, Coda, S, Goodman, T P, Nikkola, P, Pochelon, A, and Sauter, O}
abstractNote = {Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly ({approx_equal}3 ms), during a slow ({approx_equal}200 ms) self-inductive evolution of the magnetic shear. This crucial observation, and the correlation of the transition with the time and location of the magnetic shear reversal, lend support to models attributing the reduced transport to the local properties of a zero-shear region, in contrast to models predicting a gradual reduction due to a weak or negative shear.}
doi = {10.1103/PhysRevLett.93.215001}
journal = []
issue = {21}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Nov}
}