@techreport{oai:nifs-repository.repo.nii.ac.jp:00010033,
 author = {"Nakajima,  N. and Todoroki,  J. and Okamoto,  M."},
 month = {Sep},
 note = {"The relation between the Hamada and the Boozer magnetic coordinate system is clarified by deriving them from a general magnetic field coordinate system. The coordinate transformation from the Hamada to the Boozer coordinate system is performed using a transformation function, which is easily calculated with the knowledge of the magnetic field strength only. In non-axisymmetric systems, the Fourier spectrum of the magnetic field strength |vec{B}| in the Hamada coordinate system is broader than that in the Boozer coordinate system and the leading modes of |vec{B}| in the Hamada coordinate system significantly deviate from a simple model field in comparison with the Boozer coordinate system. The Boozer coordinate system is suitable for numerical calculations, especially, for neoclassical and orbit calculations in non-axisymmetric systems."},
 title = {On Relation between Hamada and Boozer Magnetic Coordinate System},
 year = {1992}
}