Developments of Millimeter and Sub-Millimeter Wave Backscattering Systems for Fusion Plasma Turbulence Diagnostics

Two types of back scattering systems are utilized for high temperature fusion plasma turbulence study. W-band backscattering system is used for measuring the electron Larmor radius scale turbulence and around Q-band frequency comb Doppler backscattering system have been designed for measuring the ion Larmor radius scale turbulence.