Three-dimensional numerical simulation on 15~20 mA H- cusp source
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摘要: 对自主开发的全三维粒子模拟/蒙特卡罗（PIC/MCC）算法进行了阐述，包括算法流程设计、碰撞处理机制等。采用该算法对中国原子能科学研究院研制的15~20 mA负氢离子源进行数值模拟研究，结果显示：该多峰会切离子源能得到空间分布均匀的离子束，采用优化后的虚拟过滤场，不仅能有效过滤高能电子，还将导致离子源下游区域低能电子增多，有效提高负氢离子体积产生效率。Abstract: The self-developed 3D PIC/MCC algorithm is described, including the algorithm flow design, collision treatment mechanism and so on. The numerical simulation of the 15~20 mA H- cusp source developed by the China Institute of Atomic Energy is researched with this algorithm. The results show that H- cusp source can produce ion beams that uniformly distribute in objective space. Using the optimized virtual filtering field can effectively filter high-energy electrons and lead to the low-energy electron in the ion source downstream region to increase. The negative hydrogen ions volume generation efficiency is improved effectively.
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