@article{oai:nifs-repository.repo.nii.ac.jp:00000475,
 author = {ISOBE,  Mitsutaka and OKAMURA,  Shoichi and NAKAJIMA,  Noriyoshi and SHIMIZU,  Akihiro and NISHIMURA,  Shin and SUZUKI,  Chihiro and MURAKAMI,  Sadayoshi and FUJISAWA,  Akihide and MATSUOKA,  Keisuke and ISOBE,  Mitsutaka and OKAMURA,  Shoichi and NAKAJIMA,  Noriyoshi and SHIMIZU,  Akihiro and NISHIMURA,  Shin and SUZUKI,  Chihiro and MURAKAMI,  Sadayoshi and FUJISAWA,  Akihide and MATSUOKA,  Keisuke},
 journal = {Journal of Plasma and Fusion Research SERIES},
 month = {Jan},
 note = {990058674, The characteristic difference of neoclassical bootstrap current and its effects on MHD equilibria are described for the CHS heliotron/torsatron and the CHS-qa quasi-axisymmetric stellarator. The direction of bootstrap current strongly depends on collisionality in CHS, whereas it does not in CHS-qa because of quasi-axisymmetry. In the CHS configuration, it appears that enhanced bumpy (Bs1) and sideband components of helical ripple (By1) play an important role in reducing the magnetic geometrical factor, which is a key factor in evaluating the value of bootstrap cuffent, and determining its polarity. The bootstrap current in CHS-qa is theoretically predicted to be larger than that in CHS and produces significant effects on the resulting rotational transform and magnetic shear. In the finite B plasmas, the magnetic well becomes deeper in both CHS and CHS-qa and its region is expanded in CHS. The existence of co-flowing bootstrap current makes the magnetic well shallow in comparison with that in currentless equilibrium.},
 pages = {360--365},
 title = {On the Characteristic Difference of Neoclassical Bootstrap Current and Its Effects on MHD Equilibria between CHS Heliotron/Torsatron and CHS-qa Quasi-Axisymmetric Stellarator},
 volume = {5},
 year = {2002}
}