P波段紧凑型多注速调管互作用模拟设计

Interaction Simulation Design of a Compact P-Band Multi-beam Klystron

质子加速器广泛应用于高能物理和肿瘤治疗领域,对作为其核心部件的低频段速调管的效率和尺寸有着较高的要求。为满足国内高性能质子加速器的需求,本文设计了一款小型化的P波段多注速调管。与传统单注速调管相比,多注速调管电压低、效率高、体积小。通过在群聚段引入高次谐波腔,可以进一步减小多注速调管的互作用长度,在实现小型化的同时达到高效率。本文介绍了714 MHz、2 MW的脉冲波速调管的初步仿真与计算。利用一维仿真软件和三维仿真软件优化设计,得到了74%的效率,增益为50 dB,互作用长度控制在1250 mm以内。

Proton accelerators are widely used in the fields of high energy physics and tumor treatment, and they have high requirements for the efficiency and size of low frequency klystrons used as their core components. In order to meet the needs of domestic high-performance proton accelerators, a compact P-band multi-beam klystron is designed. Compared with traditional single-beam klystrons, the multi-beam klystron has the advantages of low voltage, high efficiency and small size. The introduction of higher harmonic cavity can further reduce the interaction length, which enable high efficiency with miniaturized size. Preliminary simulation and calculation of a 714 MHz and 2 MW pulse wave klystron is introduced. Optimized by 1 D and 3 D simulation software, the efficiency of the klystron is 74%, the gain is 50 dB, and the interaction length is controlled within 1250 mm.