Abstract
The China fusion engineering testing reactor (CFETR) is a proposed tokamak nuclear fusion reactor in China, the purpose of which is to achieve large-scale power generation at the DEMO level and tritium self-sufficiency. Given that energy generation via this reactor can possibly solve energy crises in the future, the hybrid and steady-state operation modes for phase II of the CFETR under 1 GW discharge power targets are investigated comprehensively herein as per its engineering design parameters and using the integrated code METIS. The optimized condition for hybrid operation of the CFETR is obtained by adopting the dual neutral beam injection scheme under optimized energy and injection. With the electron cyclotron current drive and lower hybrid current drive deposited at the same off-axis position, the CFETR steady-state operation scenario is obtained by controlling the peak values of these driven current profiles. Moreover, it is found that the internal transport barrier (ITB) towards the plasma core can be controlled via selection of an appropriate peak driven current. Overall, these aspects are essential for evaluating the performance metrics and predictive physics of the CFETR. They also serve as a guide for prospective experiments that can be conducted in the future.
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