@techreport{oai:nifs-repository.repo.nii.ac.jp:00009592, author = {"Hamada, Y. and Nishizawa, A. and Kawasumi, Y. and Fujisawa, A. and Kojima, M. and Narihara, K. and Ida, K. and Ejiri, A. and Ohdachi, S. and Kawahata, K. and Toi, K. and Sato, K. and Seki, T. and Iguchi, H. and Adachi, K. and Hidekuma, S. and Hirokura, S. and Iwasaki, K. and Ido, T. and Kumazawa, R. and Kuramoto, H. and Minami, T. and Nomura, I. and Sasao, M. and Sato, K.N. and Tsuzuki, T. and Yamada, I. and Watari, T."}, month = {Oct}, note = {"Microscopic potential turbulence in tokamak plasmas are investigated by a multi-sample-volume heavy ion beam probe. The wavenumber/frequency spectra S(k,omega) of the plasmas potential fluctuation as well as density fluctuation are obtained for the first time. The instantaneous turbulence-driven particle flux, calculated from potential and density turbulence has oscillations of which amplitude is about 100 times larger than the steady-state outwards flux, showing sporadic behaviours. We also observed large-scale coherent potential oscillations with the frequency around 10-40 kHz."}, title = {Potential Turbulence in Tokamak Plasmas}, year = {1998} }