Design of Antenna and Impedance Matching Network for JFT-2 1-MW ICRF Experiment

摘要

Antenna and impedance matching networks for JFT-2 1-MW ICRF experiment are discussed. It can be expected that the loading resistance and characteristic impedance are 2.7 omega /m and 76 omega , respecitvely. By optimization of the impedance matching network, about 800 kW of rf power can be coupled with the plasma with short ended 1/4 turn antenna and RG-19U coaxial cable between antenna and stub. In this case, the rf potentials stand 11.5 kV at the antenna edge, 14.5 kV at the stub and 52 kV between the antenna and the stub. These values may be allowed by the previous ICRF experiments in DIVA. The discussions in this paper are useful for the next step high power ICRF experiments.