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Neoclassical transport optimization of LHD

MPG-Autoren
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Maaßberg,  H.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

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Beidler,  C. D.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

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Zitation

Murakami, S., Wakasa, A., Maaßberg, H., Beidler, C. D., Yamada, H., Watanabe, K. Y., et al. (2002). Neoclassical transport optimization of LHD. Nuclear Fusion, 42(11), L19-L22.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0027-4230-0
Zusammenfassung
Neoclassical transport is studied for large helical device (LHD) configurations in which the magnetic axis has been shifted radially by determining the mono-energetic transport coefficient and the effective helical ripple. With respect to the transport in the long mean-free-path collisionality region- the so-called 1/v transport-the optimum configuration is found when the magnetic axis has a major radius of 3.53 m, which is 0.22 In inward shifted from the 'standard' configuration of LHD. In the optimized case, the effective helical ripple is very small, remaining below 2% inside 4/5 of the plasma radius. This indicates that a strong inward shift of the magnetic axis in the LHD can diminish the neoclassical transport to a level typical of so-called 'advanced stellarators'.