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Title: OVERVIEW OF H-MODE PEDESTAL RESEARCH ON DIII-D

OVERVIEW OF H-MODE PEDESTAL RESEARCH ON DIII-D Developing an understanding of the processes that control the H-mode transport barrier is motivated by the significant impact this small region (typically <2% of the minor radius) can have on overall plasma performance. Conditions at the inner edge of the H-mode transport barrier can strongly influence the overall energy confinement, and the maximum density, and therefore fusion power, that can be achieved with the typically flat H-mode density profiles [1,2]. The ELM instability, which usually regulates the pressure gradient in the H-mode edge, can result in large power loads to, and erosion of, the divertor targets in a reactor scale device [3]. The goal of H-mode pedestal research at DIII-D is to: (1) develop a physics based model that would allow prediction of the conditions at the top of the H-mode pedestal, (2) develop an understanding of processes which control Type I ELM effects in the core and divertor, and (3) explore alternatives to the Type I ELM regime.
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Publication Date:
OSTI Identifier:OSTI ID: 805253
DOE Contract Number:AC03-99ER54463
Resource Type:Conference
Resource Relation:Conference: 28th European Physical Society Conference on Plasma Physics in Controlled Fusion, Madeira (PT), 06/18/2001--06/22/2001; Other Information: THIS IS A PREPRINT OF A PAPER TO BE PRESENTED AT THE 28TH EUROPEAN PHYSICAL SOCIETY CONFERENCE ON PLASMA PHYSICS IN CONTROLLED FUSION, MADEIRA, PORTUGAL, JUNE 18-22, 2001, AND TO BE PUBLISHED IN THE ''PROCEEDINGS''; PBD: 1 Jul 2001
Research Org:GENERAL ATOMICS (US)
Sponsoring Org:(US)
Country of Publication:United States
Language:English
Subject: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONFINEMENT; DIVERTORS; DOUBLET-3 DEVICE; FORECASTING; INSTABILITY; PERFORMANCE; PHYSICS; PRESSURE GRADIENTS; TARGETS; TRANSPORT