Experimentally inferred thermal diffusivities in the edge pedestal between edge-localized modes in DIII-D

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/33314

Title: Experimentally inferred thermal diffusivities in the edge pedestal between edge-localized modes in DIII-D
Author: Stacey, Weston M. ; Groebner, Richard J.
Abstract: Using temperature and density profiles averaged over the same subinterval of several successive inter-edge-localized-mode (ELM) periods, the ion and electron thermal diffusivities in the edge pedestal were inferred between ELMs for two DIII-D [ J. Luxon, Nucl. Fusion 42, 614 (2002) ] discharges. The inference procedure took into account the effects of plasma reheating and density buildup between ELMs, radiation and atomic physics cooling, neutral beam heating and ion-electron equilibration, and recycling neutral and beam ionization particle sources in determining the conductive heat flux profiles used to infer the thermal diffusivities in the edge pedestal. Comparison of the inferred thermal diffusivities with theoretical formulas based on various transport mechanisms was inconclusive insofar as identifying likely transport mechanisms.
Description: © 2007 American Institute of Physics. The electronic version of this article is the complete one and can be found online at:http://link.aip.org/link/PHPAEN/v14/i12/p122504/s1 DOI: 10.1063/1.2817969
Type: Article
URI: http://hdl.handle.net/1853/33314
ISSN: 1070-664X
Citation: W. M. Stacey and R. J. Groebner, "Experimentally inferred thermal diffusivities in the edge pedestal between edge-localized modes in DIII-D," Physics of Plasmas, 14 (2007) 122504
Date: 2007-12-11
Contributor: Georgia Institute of Technology. School of Physics
General Atomics
Publisher: Georgia Institute of Technology
American Institute of Physics
Subject: Plasma density
Plasma instability
Plasma temperature
Plasma transport processes
Thermal diffusion
Tokamak devices

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