抄録
The locality and spatial controllability of ECCD are numerically analyzed by changing the direction and location of EC beam injection. The optimum angles of beam injection are obtained for the most localized current drive and the maximum drive efficiency. The profile of the driven current with the maximum efficiency is very broad, i.e., not suitable for localized current drive. When the location of driven current is controlled by the beam injection from the equatorial plane, the locality is extremely destroyed due to the refraction of the ray according to the location of cyclotron resonance layer. The locality is well kept by the injection from an upper or lower side of the equatorial plane.
