Publication

Decorrelation of edge plasma turbulence at the transition from low- to high-confinement mode in the DIII-D Tokamak

Stefano Coda
2000
Journal Articles

Abstract

The modification of turbulence in the edge plasma of the DIII-D tokamak at the transition from the low to the high mode of confinement is investigated with a phase-contrast imaging diagnostic. The amplitude and radial correlation length of the turbulence in the confinement region decrease at the transition, whereas the decorrelation time increases. The transition model of Biglari, Diamond, and Teny [Phys. Fluids B 2 (1990) 1], based on turbulence decorrelation by E x B velocity shear, is quantitatively substantiated by measurements of the theoretical control parameter. Further quantitative predictions of the theory are tested for the first time. (C) 2000 Published by Elsevier Science B.V.

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https://infoscience.epfl.ch/entities/publication/428103c3-5e2a-479f-9c20-d2666508877c

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Stefano Coda
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/428103c3-5e2a-479f-9c20-d2666508877c

About this result

Related concepts (32)

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Magnetic confinement fusion is an approach to generate thermonuclear fusion power that uses magnetic fields to confine fusion fuel in the form of a plasma. Magnetic confinement is one of two major branches of fusion energy research, along with inertial confinement fusion. The magnetic approach began in the 1940s and absorbed the majority of subsequent development. Fusion reactions combine light atomic nuclei such as hydrogen to form heavier ones such as helium, producing energy.

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Decorrelation of edge plasma turbulence at the transition from low- to high-confinement mode in the DIII-D Tokamak

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