Publication

EFFECT OF LOCALISED ELECTRON CYCLOTRON HEATING ON ENERGY CONFINEMENT AND MHD IN TCV

Olivier Sauter, Stefano Coda, Basil Duval, Henri Weisen, Jonathan Bryan Lister, Timothy Goodman, Yves Martin, Antoine Pochelon, Mark Henderson, Minh Quang Tran, Jean-Marc Moret, Ivo Furno, Roland Behn, Jean-Philippe Hogge, Holger Reimerdes, Bernard Joye, Gilbert Tonetti, Xavier Llobet, Adriano Manini
1998
Conference Papers

Abstract

Within the range of plasma shapes and plasma currents investigated, the electron confinement time, tau_Ee, increases with safety factor, density and negative triangularity similar to the Ohmic heating case. There is little dependence of tau_Ee on the heating location provided power deposition occurs inside the q=1 surface; as power deposition moves out of the inversion surface, tau_Ee decreases. The power-induced energy confinement degradation exponent (tau_Ee~PaP) is as usual: alpha_P ~-0.5. As a general trend, central relaxations decrease in amplitude with increasing qa, P_EC, or negative delta, in a situation where the confinement time increases.

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Abstract

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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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