论文部分内容阅读
医疗质子治疗回旋加速器一般具有结构紧凑、磁场强度高、所加速的质子束流强不高等特点,针对其特点采用PIG内部离子源,要求其结构紧凑、体积小,能提供几十keV、约100μA的质子束流。根据这种要求,在模拟仿真计算的基础上,完成了内部离子源的结构设计。内部离子源整体结构主要由阳极、对阴极、吸极、挡束板等部件组成,图1为内部离子源原理示意图。其设计难点在于:内部离子源安装空间小,解决内部离子源的高电压绝缘、真空、水冷问
The medical proton therapy cyclotron generally has the characteristics of compact structure, high magnetic field intensity and strong acceleration of proton beam. Due to its characteristics, the PIG internal ion source is used, which requires compact structure and small volume and can provide dozens of keV and about 100 μA Proton beam. Based on this requirement, the structural design of the internal ion source is completed on the basis of simulation and calculation. The overall structure of the internal ion source is mainly composed of the anode, the cathode, the absorber, the baffle plate and other components. Figure 1 shows the principle of the internal ion source. The design difficulties are: internal ion source installation space is small, to solve the internal high-voltage ion source insulation, vacuum, water-cooled asked