AbstractPolarizers with non-rectangular grooves are studied in high power millimeter wave transmission lines for electron cyclotron heating (ECH) and electron cyclotron current drive (ECCD) of fusion plasmas. The groove shape is important for determining the polarization parameters and avoiding arc breakdown in the system. A low-power measurement has been carried out for several polarizers with different groove depths. The polarization characteristics experimentally measured are in good agreement with numerical results in which the actual groove shape is taken into account. The polarizers are designed and applied to different frequencies of ECH/ECCD systems. Favorable results have been obtained in high-power transmission up to 500 kW, 0.2 s.
非矩形沟槽偏光器在用于聚变等离子体电子回旋加热（ECH）和电子回旋电流驱动（ECCD）的高功率毫米波传输线中进行了研究。沟槽形状对于确定偏振参数和避免系统中电弧击穿至关重要。针对具有不同沟槽深度的多个偏光器进行了低功率测量。实验测得的偏振特性与考虑实际沟槽形状的数值结果吻合良好。这些偏光器被设计并应用于不同频率的ECH/ECCD系统。在高达500 kW、0.2 s的高功率传输中获得了良好的结果。