@article{oai:nifs-repository.repo.nii.ac.jp:00010772,
 author = {Kobayashi, Tatsuya and Losada, U. and Liu, B. and Esreada, T. and Milligen, B.Ph. van and Gerru, R. and Sasaki, Makoto and Hidalgo, C.},
 issue = {4},
 journal = {Nuclear Fusion},
 month = {Mar},
 note = {0000-0001-5669-1937, In this letter, we investigate the spatial structure of a low frequency global potential oscillation, which is likely ascribed as the low frequency zonal flows, in TJ-II laboratory plasmas. In two plasmas produced by different heating schemes (electron cyclotron resonance heating and neutral beam injection heating) and characterized by different mean radial electric field structures, frequency-space-decomposed spectra of the global potential oscillation are obtained. In both cases, the oscillatory field has a single-peaked potential structure and a dipole radial electric field structure. The oscillating structure depends on its frequency as well as on the heating scheme.},
 title = {Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator},
 volume = {59},
 year = {2019}
}