Numerical analysis and comparative study of three-ion heating scenarios on the CFEDR

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Abstract
Ion cyclotron resonance heating (ICRH) is one of the common auxiliary heating methods employed in tokamaks. Therefore, optimizing the ICRH scheme for tokamaks is of great importance. In this study, the two-dimensional full-wave code Interative fluid-kinetics (INTFLUK) is employed to systematically investigate ICRH scenarios for the China Fusion Engineering Demonstration Reactor (CFEDR). A comparative analysis is conducted between the D–T– 7 Li three-ion heating scheme and the conventional D–T– 3 He minority scheme. Both the D–T– 7 Li and D–T– 3 He scenarios exhibit a relatively high target ion absorption fraction. For the D–T– 7 Li scheme, increasing the 7 Li ion concentration while reducing the T ion concentration effectively minimizes collisional energy transfer to electrons Furthermore, results indicate that the target ion absorption fraction in the D–T– 7 Li scenario is superior to that of other three-ion alternatives. Finally, an assessment of alpha particle effects under the optimized scheme reveals that when the alpha particle concentration reaches 3%, its power absorption fraction exceeds 50%. However, assuming an equivalent Maxwellian distribution slightlyoverestimates the alpha particle power absorption fraction compared to a conventional slowing-down distribution.
Funding Information
  • National Natural Science Foundation of China (11905084)
  • National magnetic confinement fusion energy development research project (2019YFE03070000)
  • Comprehensive Research Facility for Fusion Technology Program of China (2018-000052-73-01001228)

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