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1997•University of North Texas Digital Library (University of North Texas)Open access

Assessment of effects of neutrals on the power threshold for L to H transitions in DIII-D

L.W. Owen, B.A. Carreras, R. Maingi, P.K. Mioduszewski, T. N. Carlstrom, R. J. Groebner

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Abstract

To assess the effect of edge neutrals on the low-to-high confinement transition threshold, a broad range of plasma discharges has been analyzed. From this analysis, the transition power divided by the density, at constant magnetic field, appears to be a function of a single parameter measuring the neutrals` effect. This results suggest that there is a missing parameter linked to the neutrals in the power threshold scaling laws.

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To assess the effect of edge neutrals on the low-to-high confinement transition threshold, a broad range of plasma discharges has been analyzed. From this analysis, the transition power divided by the density, at constant magnetic field, appears to be a function of a single parameter measuring the neutrals` effect. This results suggest that there is a missing parameter linked to the neutrals in the power threshold scaling laws.

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Available abstract

To assess the effect of edge neutrals on the low-to-high confinement transition threshold, a broad range of plasma discharges has been analyzed. From this analysis, the transition power divided by the density, at constant magnetic field, appears to be a function of a single parameter measuring the neutrals` effect. This results suggest that there is a missing parameter linked to the neutrals in the power threshold scaling laws.

Key concepts: DIII-D, Power (physics), Physics, Nuclear engineering, Nuclear physics, Plasma, Tokamak, Engineering

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