论文部分内容阅读
模拟研究了 1 6个腔、高梯度的W band光阴极微波电子枪系统 ,该系统能产生和加速 3 0 0pC的电子束团 .设计系统由频率 91 .3 92GHz光阴极微波电子枪以及频率 91 .3 92GHz行波加速结构组成 .基于射频直线加速器标度律与数值模拟结果 ,设计系统能产生能量 1 .74MeV ,电量 3 0 0pC ,束团长度 0 .72ps,归一化横向发射度 0 .55mm·mrad的电子束团 .研究了高频、高梯度下的束流动力学 .由于高梯度 ,有质动力效应在束流动力学中起重要作用 ,且由于横向与纵向之间的耦合 ,在基次空间谐波的情形下 ,仍然存在着有质动力聚焦效应 .
A 16-chamber, high-gradient W band photocathode system was developed to simulate the generation and acceleration of electron bunches at a velocity of 300 pC.The design system consisted of a 91.33 GHz microwave cathode electron gun with a frequency of 91.3 92GHz traveling wave acceleration structure.According to the RF linear accelerator scale law and numerical simulation results, the designed system can generate energy of 1.74MeV, power of 300pC, bunching length of 0.72ps and normalized transverse emissivity of 0.55mm · mrad electron beam cluster.The beam dynamics under high frequency and high gradient has been studied.High gradient and the qualitative and dynamic effects play an important role in beam dynamics.Because of the coupling between the horizontal and vertical directions, In the case of harmonics, there is still a qualitative dynamic focusing effect.