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在回旋加速器中,高频系统为带电粒子加速提供能量,高频谐振腔作为高频系统中的关键部件,它性能的好坏直接决定着粒子是否能够被加速,所以,高频谐振腔的设计非常关键.在100MeV负氢回旋加速器的设计中,在空间限制的同时,要求加速电压从中心区的60kV到引出区的120kV变化,这对谐振腔的设计提出了很高的要求.基于上述条件,本工作利用有限差分法的软件CST MICROWAVE STUDIO设计的双内杆结构的44MHz高频谐振腔初步设计完成,根据初步设计的结论,加工与实际腔体尺寸1:1模型,模型高频参数测量的结果与CST MICROWAVE STUDIO的计算相吻合,结果是可信的.
In cyclotron, high-frequency system for the acceleration of charged particles to provide energy, high-frequency resonant cavity as a key component of high-frequency system, its performance is directly determines the particle can be accelerated, so the design of high-frequency resonant cavity Is very critical.In the design of the 100 MeV negative cyclotron, it is required to accelerate the voltage from 60 kV in the central area to 120 kV in the lead-out area while space constraints are required, which puts high demands on the design of the resonant cavity. Based on the above conditions In this work, a 44MHz HF resonant cavity with double inner rod structure designed by CST MICROWAVE STUDIO was designed. According to the preliminary design conclusion, a 1: 1 model of cavity size and actual cavity size were measured. The result is in agreement with the CST MICROWAVE STUDIO calculation and the result is credible.