@article{oai:nifs-repository.repo.nii.ac.jp:00010513,
 author = {NARUSHIMA,  Yoshiro and MIYAZAWA,  Junichi and MIYAZAWA, Jun-ichi and matsunaga, sinnosuke and YANAGI,  Nagato},
 journal = {Plasma and Fusion Research},
 month = {Oct},
 note = {Optimization of the helically-winding structure required for the helical fusion reactor utilizing the high temperature
superconductor (HTS) tape is studied by numerical calculation. When the HTS tapes are wound to be
the helical structure without the torsion, a significant edgewise strain appears. This might lead to the degradation
of the performance of the HTS tape. Therefore, the edgewise strain must be minimized. It is found that the edgewise strain can be suppressed by the proper determination of the torsion by the optimization utilizing the Fourier decomposition of the distribution of the edgewise strain. The HTS tapes with edgewise strain are intrinsically deformed due to the torsion to reduce the edgewise strain so to be an “edgewise-strain-free” helical shape.},
 pages = {140576--1405081},
 title = {Edgewise-strain-free helical winding using high-temperature superconducting tape conductor},
 volume = {15},
 year = {2020}
}