Modelling of LHCD with transportcalculations is performed with the JETTO transport code, whichhas been upgraded by implementing the Fast Ray Tracing Code tocalculate self-consistent LH power deposition profiles. Heatand particle transport models that are able to reproduce theexperimental JET temperature and density profiles are used in JETTO for predictive high performance modelling. Application of3.5 MW LHCD power provides an inverted q profile across 50-70%of the plasma radius whereas, without LHCD, the q profile ismonotonic during the flat-top phase. The results predict that thefusion power is about 60% higher for high performance DTplasmas in the optimized shear scenario with 3.5 MW LHCD appliedduring the high performance phase than without LHCD at Bt = 3.4 T and Ip = 3.9 MA on JET. In addition, the width of the internal transport barrier (ITB) is 0.25-0.30 m larger and the ITBcan be sustained for a longer time with LHCD.
Investigation of LHCD capabilities in I-mode plasma on EAST tokamak