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Author(s):
N. Ohyabu, N. Noda, Hantao Ji, H. Akao, K. Akaishi, T. Ono, H. Kaneko, T. Kawamura, Y. Kubota, S. Morimoto. A. Sagara, T. Watanabe, K. Yamazaki and O. Motojima
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Title:
Helical Divertor in the Large Helical Device
Date of publication:
May 1992
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Key words:
helical divertor, high temperature divertor plasma, torsatron, LHD helical device, confinement enhancement
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Abstract:
The Large Helical device (LHD), now under construction is a Heliotron/torsatron device with a closed divertor system. The edge LHD magnetic structure has been studied in detail. A peculiar feature of the configuration is existence of edge surface layers, a complicated three dimensional magnetic structure. However it does not seem to hamper the expected divertor functions. As a confinement improvement scheme in LHD, we have proposed a high temperature divertor plasma operation in which a divertor plasma with temperature of a few kev, generated by efficient pumping, leads to the confinement improvement. Conceptual designs of the LHD divertor components are under way.
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