Study on Overdense Plasmas by Electron Bernstein Waves in a Dipole Magnetic Confinement Device

电子伯恩斯坦波（EBW）对高密度等离子体的加热具有重要意义.在内部环形装置Mini-RT中，X模式波从低场侧注入等离子体中，并且直接测量波在等离子体内部的传播。通过实验确定了电子束波的典型特性，如短波长、后向波、电子热速度的群速度等。这些结果表明，直接观察到模式转换从X模式到EBW。

An Electron Bernstein Wave (EBW) is attractive for heating of overdense plasmas. In the internal ring device Mini-RT an X-mode wave is injected into the plasma from the low-field-side, and the propagation of the wave inside the plasma is directly measured. Typical characteristics of the EBW such as a short wavelength, backward wave, a group velocity of the electron thermal velocity are experimentally identified. These results indicate the direct observation of the mode conversion from the X-mode to the EBW.