@techreport{oai:nifs-repository.repo.nii.ac.jp:00009695,
 author = {Iguchi,  H. and Crowley,  T. P. and Fujisawa,  A. and Lee,  S. and Tanaka,  K. and Minami,  T. and Nishimura,  S. and Ida,  K. and Akiyama,  R. and Hamada,  Y. and Idei,  H. and Isobe,  M. and Kojima,  M. and Kubo,  S. and Morita,  S. and Ohdachi,  S. and Okamura,  S. and Osakabe,  M. and Matsuoka,  K. and Takahashi,  C. and Toi,  K.},
 month = {Feb},
 note = {Local space potential fluctuations have been measured during MHD activities in a low-beta NBI heated plasma in the Compact Helical System (CHS) by the use of a heavy ion beam probe (HIBP). Two types of MHD modes with accompanying potential oscillations are observed. One appears in periodic bursts with relatively low frequency (< 40 kHz) and large amplitude (20 - 40 volts), and is localized around the q = 2 surface (average minor radius rho ~ 0.7). The other appears in continuous and coherent oscillation with higher frequency (105 - 125 kHz) and smaller amplitude (~ 5 volts). This oscillation also has spatial structure. Possible interpretation for the space potential oscillations is presented.},
 title = {Space Potential Fluctuations during MHD Activities in the Compact Helical System (CHS)},
 year = {1998}
}