Extension of Operational Regimes with ICRF Heating on GAMMA 10/PDX

Recent ICRF heating experiments performed in GAMMA 10/PDX are reported. Owing to antenna-phasing technique and four ICRF antennas installed in the mirror cells other than the central cell, the operational regime of GAMMA 10/PDX is significantly extended. Several ICRF heating schemes to increase the parameters (plasma density in the central cell, particle flux flowing to the machine end and its ion temperature parallel to the field lines) are demonstrated. These results present positive progress in the ongoing divertor simulation experiments on GAMMA 10/PDX.