@techreport{oai:nifs-repository.repo.nii.ac.jp:00009549,
 author = {Fujisawa,  A. and Iguchi,  H. and Lee,  S. and Crowley,  T.P. and Hamada,  Y. and Sanuki,  H. and Itoh,  K. and Kubo,  S. and Idei,  H. and Minami,  T. and Tanaka,  K. and Ida,  K. and Nishimura,  S. and Hidekuma,  S. and Kojima,  M. and Takahashi,  C. and Okamura,  S. and Matsuoka,  K.},
 month = {Jul},
 note = {This paper presents direct experimental observations of potentia1 profiles of a toroida1 helical plasma in the Compact Helical System, using a 200keV heavy ion beam probe. Electron cyclotron heated plasmas show a positive potential profile in a low density regime (bar{n}_e = 3 x 10^12 cm^-3), while neutral beam injection heated plasmas (bar{n}_e  = 8 x 10^12 cm^-3) exhibit a negative potential profile. A loss cone structure evaluated from the observed potential is discussed to understand the behavior of high energy particle in a toroidal helical plasma.},
 title = {Direct Observation of Potential Profiles with a 200keV Heavy Ion Beam Probe and Evaluation of Loss Cone Structure in Toroidal Helical Plasmas on the Compact Helical System},
 year = {1996}
}