@article{oai:nifs-repository.repo.nii.ac.jp:00011044,
 author = {GOTO, Takuya and ICHIGUCHI,  Katsuji and TAMURA,  Hitoshi and MIYAZAWA,  Junichi and MIYAZAWA, Jun-ichi and SATAKE,  Shinsuke and YAMAGUCHI, Hiroyuki and YANAGI,  Nagato and The FFHR, Design Group},
 journal = {Plasma and Fusion Research},
 month = {Jun},
 note = {0000-0001-6028-8980, The effect of the pitch modulation of the helical coils on the core plasma performance of the LHD-type helical fusion reactor has been examined. The analysis of the MHD stability and neoclassical transport for the pitch modulation α = 0.0 and 0.1 has been conducted based on the finite-beta equilibrium calculated by the HINT code. It was found that the MHD stability is clearly improved without deteriorating the energy transport property by changing the pitch modulation α from 0.1 to 0.0. The reachable operation region expands to the higher density and the expected fusion gain can increase from ∼10 to ∼20. Because the change of the pitch modulation α from 0.1 to 0.0 requires only a slight change in the shape of the helical coils, the engineering design including the maintenance method that has been examined for the reactor with α = 0.1 can be applied without a major modification.},
 title = {Effect of the Pitch Modulation of Helical Coils on the Core Plasma Performance of the LHD-Type Helical Fusion Reactor},
 volume = {16},
 year = {2021}
}