The Chinese Fusion Engineering Testing Reactor (CFETR) plans to use an ITER-type antenna and couple ∼30 MW ion cyclotron range of frequencies (ICRF) power to the plasma. In this paper, the physical design of a CFETR antenna in the midplane port is carried out. Parameter scans were performed to study the optimized toroidal and poloidal numbers of straps as well as the optimized geometric sizes of the straps. The coupling resistance, power spectrum, maximum voltage in the resonant transmission line of the strap and parallel electric field in the antenna vicinity are used to determine the performance of the studied antennas. It is shown that four poloidal substraps (i.e. quadruplets) and six toroidal strap columns arranged in half of the antenna allows the antenna to have the best coupling capability. To improve the coupling capability of the proposed antenna model, local gas puffing methods, as well as various antenna phasings, are studied. It is indicated that the coupling resistance can be increased by a factor of three for all studied antenna phasings when applying the midplane gas puffing with a gas puff rate in the order of 4 × 1023 el s-1. The toroidal phasings suitable for heating include (0, pi, 0, pi, 0, pi) and (0, pi, pi, 0, 0, pi).
中国聚变工程测试反应堆（CFETR）计划使用ITER型天线，并向等离子体耦合约30 MW的离子回旋频率范围（ICRF）功率。本文对CFETR天线在中平面端口处的物理设计进行了研究。通过参数扫描，研究了优化的环向和极向 strap 数量以及优化的 strap 几何尺寸。耦合电阻、功率谱、strap 谐振传输线中的最大电压以及天线附近的平行电场被用于评估所研究天线的性能。结果表明，四个极向子 strap（即四重结构）和六个环向 strap 列布置在天线的一半内，可使天线具有最佳的耦合能力。为了改善所提出天线模型的耦合能力，研究了局部气体注入方法以及各种天线相位。结果表明，对于所有研究的天线相位，当在中平面处施加气体注入且气体注入速率约为4 × 10²³ el s⁻¹时，耦合电阻可提高三倍。适用于加热的环向相位包括（0, π, 0, π, 0, π）和（0, π, π, 0, 0, π）。