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Author(s):
K. Itoh, S. - I. Itoh, H. Sanuki, A. Fukuyama
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Title:
An H-mode-Like Bifurcation in Core Plasma of Stellarators
Date of publication:
June 1991
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Key words:
Improved Confinement, H-Mode, Wendelstein VII-A, Stellarator, Radial Electric Field, Anomalous Transport
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Abstract:
The radial electric field, reduction of anomalous transport, and ion temperature profile are simultaneously analysed in the Wendelstein-VIIA (W VII-A) stellarators. Neoclassical formula is used to determine the radial electric field. Bifurcation of the anomalous transport is found at a critical injection power, above which improved confinement is possible. Experimental results of W VII-A. which have shown the sharp reduction of the H_ alpha signal after the injection of the neutral beam, are revisited.
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