Abstract:

The theory calculation of the rectangle permanent magnet was studied. The PIC-MCC simulation algorithm was analyzed in-depth. A 3D PIC-MCC simulation algorithm was developedusing the PIC software. Based on this algorithm, the discharge characteristics of multi-cusp ion source, J-PARC, were simulated and the electron energy deposition process and the generation mechanism of volume in multi-cusp ion source were analyzed. Also, the advantages of the ion source in optical characteristics and design ideas were discussed. The results showed that the ion source can produce space uniformly negative hydrogen ion beam, and the volume negative hydrogen ions were produced high efficiently.

Key words: J-PARC Multi-cusp ion source, Volume production, Spatial uniformity

摘要：

研究了矩形永磁体的理论计算方法，深入剖析了PIC-MCC处理算法，在粒子模拟软件平台下研制了全三维PIC-MCC模拟算法，并采用该算法数值研究了J-PARC多峰离子源放电特性，分析了J-PARC离子源电子能量沉积过程和体积产生机制，讨论了该离子源在光学特性和设计思路上的优势。 结果显示：该离子源能产生空间均匀的负氢离子离子束，且体积负氢离子产生效率较高。

关键词: J-PARC多峰离子源, 体积产生, 空间均匀性