Power absorption calculation for electron cyclotron resonance heating in H-1 heliac

Power absorption is calculated for electron cyclotron resonance heating (EC RH) in the H-l heliac device by using a ray tracing numerical code. The thr ee-dimensional magnetic field structure and the bean shape of flux surfaces are considered. The calculation results show that the second harmonic extr aordinary mode heating is effective even at low density if the launching di rection is properly adjusted. The localized power absorption profile can be shifted from on-axis to off-axis by controlling the magnetic field strengt h or the launching angle, making the heat transport experiment possible.