New phenomena on turbulence transport caused by electron-ion hybrid temperature gradient in magnetized plasma

电子回旋共振(ECR)等离子体的高温电子叠加在低温热电子上，形成垂直于磁力线的电子温度梯度(ETG)。研究发现，形成的ETG既能激发高频波动(ETG模)，又能通过多尺度的非线性相互作用激发低频涨落(漂移波模式)，最终导致ETG模能量转移到漂移波模式。实验证明，强E×B速度切变对ETG模和漂移波模有抑制作用。

Electron temperature gradient (ETG) perpendicular to magnetic field lines is formed by superimposing high-temperature electrons of an electron cyclotron resonance (ECR) plasma upon low-temperature thermionic electrons. The formed ETG is found to excite a high-frequency fluctuation (ETG mode), and also, to stimulate a low-frequency fluctuation (drift-wave mode) excitement via multi-scale nonlinear interaction, which ultimately causes ETG mode energy to be transferred to the drift-wave mode. Furthermore, the strong E×B velocity shear is demonstrated to suppress the ETG mode and drift-wave mode, experimentally.