@techreport{oai:nifs-repository.repo.nii.ac.jp:00009709,
 author = {"Isaev,  M.Yu. and Watanabe,  K.Y. and Yokoyama,  M. and Yamazaki,  K."},
 month = {Mar},
 note = {"Collisionless mono-energetic alpha-particle confinement in three-dimensional magnetic fields obtained from the magnetic coils of the Large Helical Device (LHD) is calculated. It is found that the inward shift of magnetic axis due to the vertical field improves the alpha-particle confinement. In contrast to the vertical field, both large positive and negative hexapole  fields do not improve the confinement. The study of the beta effect and Mercier criterion calculations for different hexapole fields are also presented."},
 title = {The Effect of Hexapole and Vertical Fields on α-particle Confinement in Heliotron Configurations},
 year = {2003}
}