论文部分内容阅读
根据加速器和微波谐振腔的基本理论,采用微波电路理论,分析和计算了驻波加速器输入波导和加速腔之间的耦合系数和束流强度对能量、束流功率、效率和X射线辐射强度等性能的影响。当耦合系数大于1时,随着耦合系数增加,加速器最大输出能量下降。随着加速器束流强度增加,加速器能量V_s降低。对于给定的束流强度,随着耦合系数增加,加速器输出能量、电子注束流功率和X射线的辐射强度存在最大值。为了使加速器获得最佳性能,确定和测量耦合系数十分重要。论文在大功率速调管输出电路的外观品质因子测试方法的基础上,针对不同耦合系数,推导出了驻波加速管的外观品质因子、固有品质因子与加速管输入端处的群延迟和驻波比的相互关系,建立了相应的测试方法。采用矢量网络分析仪,通过测量加速管输入端的群延迟和驻波比,可测得耦合系数等相关参数,该方法已在实验中获得了验证。
According to the basic theory of accelerator and microwave resonator, the microwave circuit theory is used to analyze and calculate the coupling coefficient and beam intensity between the standing wave accelerator and the accelerating cavity. The energy, beam power, efficiency and X-ray radiation intensity Impact. When the coupling coefficient is greater than 1, the maximum output energy of the accelerator decreases as the coupling coefficient increases. As the accelerator beam intensity increases, the accelerator energy V_s decreases. For a given beam intensity, as the coupling coefficient increases, there is a maximum of the accelerator output energy, the electron beam injection beam power, and the X-ray radiation intensity. In order to get the best performance for the accelerator, it is important to determine and measure the coupling coefficient. Based on the test method of appearance quality factor of high-power klystron output circuit, this paper deduces the appearance quality factor, inherent quality factor and group delay at the input of accelerating tube based on different coupling coefficients. Bobby correlation, established the corresponding test method. The vector network analyzer is used to measure the coupling coefficient and other parameters by measuring the group delay and VSWR at the input of accelerating tube. The method has been verified in the experiment.