大功率多腔速调管群聚段物理参数的数值研究

OPTIMIZATION OF PHYSICS PARAMETERS IN THE BUNCHING PROCESS FOR A HIGH-POWER MULTICAVITY KLYSTRON

利用一维电子圆盘模型，根据空间电波和运动学理论，对群聚段中的束波相互作用作了大、小信号分析，开发了一种具有部分物理参数优化功能的速调管群聚段大信号分析设计程序，并针对ＨＬ－１实验用速调管的实际测试结果，用此程序作了大量的模拟验证。在原来设计方案的基础上，对群聚段几个主要的物理参数进行了优化研究。经过优化，发现群聚效率显著提高。

According to the space charge wave theory and dynamic theory, the interaction between beam and wave in bunching process is studied separately with both large-signal and smallsignal in one-dimensional disk model. A one-dimensional large-singal bunching analysis program able to optimize partial physics parameters is developed. The results calculated with the program are compared with those measued on the five-cavity klystron used for LHCD experiments on HL-1 tokamak. Based on the original design, several parameters are optimized. Thereby the bunching efficiency is raised.