@techreport{oai:nifs-repository.repo.nii.ac.jp:00010308,
 author = {"Toda,  S. and Itoh,  K."},
 month = {Jan},
 note = {"A set of transport equations in toroidal helical plasmas is analyzed, including the bifurcation of the radial electric field.  Multiple solutions of E_r for the ambipolar condition induces domains of different electric polarities.  A structure of the domain interface is analyzed and a phase diagram is obtained in the space of the external control parameters.  The region of the reduction of the anomalous transport is identified."},
 title = {Phase Diagram of Structure of Radial Electric Field in Helical Plasmas},
 year = {2002}
}