Methods for matching to the ITER Ion Cyclotron Heating antenna

The US-ITER in-kind contribution to the ICH (Ion Cyclotron Heating) system for the tokamak being built in Cadarache, France, is the coaxial transmission lines, matching systems, and matching algorithms. A prematching system composed of 20 ohm triple-stub-tuned lines was proposed to match to the antenna. Because of constraints on the port cell and space availability, triple stub prematching may not be possible, so alternative prematching systems are proposed for use. Results of initial analyses of the prematching concepts are presented.