@article{oai:repo.qst.go.jp:00047775,
 author = {Kobayashi, T. and Itoh, K. and Ido, T. and Kamiya, K. and -I., Itoh S. and Miura, Y. and Nagashima, Y. and Fujisawa, A. and Inagaki, S. and Ida, K. and Hoshino, Katsumichi and 神谷 健作 and 星野 克道},
 journal = {Scientific Reports},
 month = {Aug},
 note = {Self-regulation between structure and turbulence, which is a fundamental process in the complex
system, has been widely regarded as one of the central issues in modern physics. A typical example
of that in magnetically confined plasmas is the Low confinement mode to High confinement mode
(L-H) transition, which is intensely studied for more than thirty years since it provides a confinement
improvement necessary for the realization of the fusion reactor. An essential issue in the L-H transition
physics is the mechanism of the abrupt “radial” electric field generation in toroidal plasmas. To date,
several models for the L-H transition have been proposed but the systematic experimental validation
is still challenging. Here we report the systematic and quantitative model validations of the radial
electric field excitation mechanism for the first time, using a data set of the turbulence and the radial
electric field having a high spatiotemporal resolution. Examining time derivative of Poisson’s equation,
the sum of the loss-cone loss current and the neoclassical bulk viscosity current is found to behave as
the experimentally observed radial current that excites the radial electric field within a few factors of
magnitude.},
 pages = {30720-1--30720-7},
 title = {Experimental Identification of Electric Field Excitation Mechanisms in a Structural Transition of Tokamak Plasmas},
 volume = {6},
 year = {2016}
}