用于加拿大TRIUMF国家实验室的1台25kW高频功率源的末级腔体结构如图1所示,该末级腔体的设计频率约为23MHz,短路端由簧片与外导体连接,作为腔体频率粗调的机构。由于高频功率源本身空间结构的限制,要减小末级腔体的长度,采取了增加腔体电容值的方法,在 The final stage cavity structure of a 25kW high frequency power source for the TRIUMF National Laboratory in Canada is shown in Figure 1. The final stage cavity is designed to have a frequency of about 23MHz and the short circuit end is connected to the outer conductor by a reed as Coarse cavity frequency body. Due to the limitation of the spatial structure of the high-frequency power source itself, the cavity length of the last stage is reduced, and the method of increasing the cavity capacitance is adopted