A New Method for Measurements of the Poloidal Rotation Velocities and Wavelength Calibration of X-ray Imaging Crystal Spectrometer in Magnetic Fusion Devices

A new simple method is presented for the wavelength calibration and measurement of poloidal rotation velocities with X-ray imaging crystal spectrometer (XICS) in magnetic fusion devices. In this method, the toroidal rotation of plasma is applied for high precise alignment and wavelength calibration of the poloidal XICS. The measurement threshold of poloidal rotation velocity can be lowered to 1-3 km/s with this method.