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Author: Stacey, Weston M. × End date: 2007 × Start date: 2007 × Item Type: Publication ×

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

2007-12-11 , Stacey, Weston M. , Groebner, Rich J.

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.

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Nuclear Energy

2007-03-15 , Stacey, Weston M.

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SABR Subcritical Advanced Burner Reactor

2007-10 , Stacey, Weston M.

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Thermal transport analysis of the edge region in the low and high confinement stages of a DIII-D discharge

2007-01-04 , Stacey, Weston M. , Groebner, Rich J.

The ion and electron thermal diffusivities have been inferred from measured density and temperature profiles in the edge of a DIII-D [ J. Luxon, Nucl. Fusion 42, 614 (2002) ] discharge with a low confinement (L-mode) stage followed by a high confinement (H-mode) stage free of edge localized modes. Conductive heat flux profiles used to construct the inferred thermal diffusivities were calculated taking into account heat convection, radiation, atomic physics effects of recycling neutrals, ion-electron equilibration, and neutral beam heating. The inferred thermal diffusivities were compared with theoretical predictions.

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Fusion DEMO Characteristics & Paths to DEMO

2007-05-08 , Stacey, Weston M.

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Annual Report 2007 Georgia Tech Fusion Research Center

2007 , Stacey, Weston M. , Friis, Zachary Ward , Lao, L. , Groebner, Rich J.

Contents: A. Interpretation of Edge Pedestal Rotation Measurements in DIII-D -- B. Experimentally Inferred Thermal Diffusivities in the Edge Pedestal Between ELMS in DIII-D -- C. Integrated Core-Pedestal-Divertor-Neutrals Modeling -- D. Ion Particle Transport in the Edge Pedestal -- E. Neutral Transport Analysisof DIII-D Experiments -- F. Sub-Critical Transmutation Reactors with Tokamak Fusion Neutron Sources Based on ITER Physics and Technology.

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