为进一步了解不同形状石墨空腔电离室内部电场的分布情况对电离电荷的产生和收集带来的影响,通过电磁场仿真软件Ansoft Maxwell 2D对三种形状的电离室内部电场分布进行了模拟分析。结果表明:球-柱形和球形电离室电场分布更为均匀,为电离室的设计提供了可靠的技术参考。 To further understand the influence of the electric field distribution inside the ionization chamber with different shape on the generation and collection of ionized charges, the electromagnetic field simulation software Ansoft Maxwell 2D was used to simulate the electric field distribution inside the three shapes of ionization chamber. The results show that the distribution of the electric field in the sphere-sphere and the sphere ionization chamber is more uniform, which provides a reliable technical reference for the design of the ionization chamber.