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Analysis of LHD Magnetic Configurations Based on a Boundary Shape Control for Improving Confinement Properties
Author(s) -
Okamura S.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200900050
Subject(s) - large helical device , boundary (topology) , planar , fourier transform , physics , magnetic confinement fusion , fourier series , fourier analysis , computational physics , plasma , materials science , tokamak , nuclear physics , computer science , mathematical analysis , mathematics , computer graphics (images) , quantum mechanics
Magnetic configurations of LHD experiments are analyzed from a viewpoint of boundary shape. Effects of Fourier mode components on confinement properties are examined for three configurations with magnetic axis shift. It was confirmed that the basic confinement properties are determined by a small number of components. Contribution of components producing a non‐planar axis structure is necessary to obtain the fundamental confinement properties of inward shifted (favorable drift orbits) and outward shifted (creation of magnetic well) configurations of LHD. Further improvement is possible by controlling appropriate Fourier components (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)