7月11日：Turbulence and its nonlinear cross-correlation analyses

　　报告标题：Turbulence and its nonlinear cross-correlation analyses

　　时间：7月11日（周四）上午9:00-11:00

　　地点：控制大厅3楼会议室

　　报告内容简介：

　　Turbulence in tokamaks and other magnetic confinement fusion devices strongly affects confinement. The complexity of turbulence is characterized by the broad band features in both temporal and spatial domains. In this talk, characteristics of turbulence during the ohmic H-mode like discharges in the STOR-M tokamak, induced by biasing and other means, will be reviewed. However, the focus of the talk is on the techniques of nonlinear cross-correlation of two turbulence signals, measured at two spatial locations, to reveal the propagation direction of the turbulence energy. The confirmation of its capability based on the time series of two nonlinearly coupled Van der Pol oscillators will be presented and discussed. Examples of experimental results from the STOR-M tokamak and TJ-II stellarator, based on the Langmuir probe measurements, will be presented.

　　报告人简介：

　　Chijin Xiao is a professor in the Department of Physics and Engineering Physics, University of Saskatchewan, Canada. He obtained his B.Sc. and M.Sc. degrees from the University of Science and Technology of China, and the Ph.D. degree from the Ruhr-University Bochum, Germany. He is currently one of the editors of the journal Radiation Effects and Defects in Solids -Incorporating Plasma Science and Plasma Technology. His research topics include confinement studies on the STOR-M tokamak, CT injection experiments for fueling, and other aspects of plasma physics and engineering.