ICRF heating experiments in CHS

The plasma production and the heating experiments with the ICRF antennas were carried out in the Compact Helical System (CHS). The Nagoya Type-III antenna installed at the low field region was used mainly for the plasma production and two half-turn antennas installed at the high field region were used for the plasma heating. These antennas have carefully designed conductors, Faraday shields and side guard limiters made of carbon. The plasma was produced and sustained by the ICRH without any additional heating in a wide range of the magnetic field strength. The significant heating effects were observed during the ICRF heating with two half-turn antennas. (author). 2 refs, 5 figs