@article{oai:nifs-repository.repo.nii.ac.jp:00000534,
 author = {WATANABE,  Tsuguhiro},
 journal = {Plasma and Fusion Research},
 month = {Sep},
 note = {A new winding law for the continuous helical coils is proposed for Large Helical Device (LHD) type fusion reactors to satisfy the requirements for a wide blanket space and large plasma volume. Helical coils wound along the geodesic line of a torus with an elongated cross section can produce a magnetic configuration having a D-shaped magnetic surface with a magnetic well in the core region and high magnetic shear in the peripheral regions. The DT alpha particle confinement performance is greatly improved by increasing the elongation factor κ of the cross section of the winding frame for the helical coils. The results suggest that a smaller LHD-type fusion reactor can be realized.},
 title = {Reduced Size LHD-type Fusion Reactor with D-shaped Magnetic Surface},
 volume = {Vol.7},
 year = {2012}
}