Modelling and issues of heating and current drive performance in ITER

Oikawa, Toshihiro; Polevoi, A. R.*; Bonoli, P. T.*; Campbell, D. J.*; Henderson, M.*; Hamamatsu, Kiyotaka; Tani, Keiji*

We have been developing physics models and computational codes for heating and current drive of NB, EC and LH. A NB code has been developed in JAEA and on the Monte-Carlo scheme with employing the Suzuki model for the ionization process, which are based on the most recent atomic data. An EC code, also developed in JAEA, is based on the ray-tracing and quasi-linear Fokker-Planck equation. A LH code, which was introduced from MIT, employs a 2D equivalent collision operator in the 1D Fokker-Planck code. Then the LH code shows a good agreement with fully 2D codes. A design changes of the NB and its injection port in 2007 made the range of the NB injection angle narrower than in the EDA2001, then the NBCD profile shifts inward by a minor radius of 0.05. The LH spectrum has to have a relatively high value of because of the accessibility condition. With this spectrum, LHCD is 0.83MA in the reference steady-state scenario for a 20MW injection from an equatorial port.