Analysis of ICRF Heating by Three Dimensional Calculation in LHD

Ion cyclotron range of frequency (ICRF) heating has been used in LHD and proved to be effective heating method for helical plasmas. For analysis of ICRF heating, full wave code has been used for toroidal plasmas. However, two-dimensional calculation, which has been carried out so far, is not sufficient for helical configuration. Then, development of three-dimensional calculation code has been started. In initial calculation, power deposition profile is similar to the experimental result. Dependence of power distribution on position.of cyclotron resonance layer also agrees with the experiment.