Antenna for Plasma Heating and Current Drive

Ion Cyclotron Range of Frequency (ICRF)

Abstract

The present status of development of ICRF antenna for heating and current drive in fusion devices is reviewed, aiming at clarifying technical subjects remained for further development toward fusion experimental reactor, i.e.ITER.Technical problems and their solutions are described for the use of the loop antenna in large tokamaks.Technical issues peculiar to the current drive antenna are discussed.Recent results on research of impurity problem during ICRF power injection are presented which clarify the mechanism of impurity release and possible countermeasures to overcome this problem totally.