TRANSMISSION LINE AND ITS COMPONENTS FOR ITER ECE DIAGNOSTIC

The paper describes a possible scheme of the transmission line for the ITER ECE diagnostic. This includes wire grid polarisers, straight jointed sections of waveguide, mitre bends and other optical components. The brief description of each component is given. Information on the transmission efficiencies of various components available in the literature is summarised, which indicates that the number of mitre bends may be a concern. The paper also describes our study of the mitre bend through simulation and the results of the simulation are presented.