ITER-like antenna for JET first results of the advanced matching control algorithms

The matching and phasing of the array is controlled by 22 feedback loops actuating the 8 matching capacitors, the 4 second stage trombones and 4 stubs, the 4 Main Transmission Line (MTL) phase shifters and the 4 phases with respect to a reference of the generators feeding the upper and lower half array through 3 dB hybrid combiner-splitters. The circuit was extensively simulated allowing the development of an algorithm to drives the SSM circuit components, trombone and stub, to optimal locations with respect to the measured remaining VSWR excursions due to ELMs. The paper focusses on the new additional matching algorithms and assesses their performance.