Three-dimensional particle-in-cell with Monte Carlo collision simulation of the electron energy distribution function in the multi-cusp ion source for proton therapy  

作　　者：杨超 吴小兵 刘大刚 

机构地区：[1]University of Electronic Science and Technology of China [2]Institute of High Energy Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2012年第10期1013-1018,共6页中国物理C（英文版）

摘　　要：For optimization and accurate prediction of the amount of proton production in the multi-cusp ion source, analysis of the electron energy distribution function （EEDF） is necessary. A three dimensional particlein-cell with Monte Carlo collision （PIC-MCC） code based on the CHIPIC software platform are developed. The code is applied to the multi-cusp proton source. The results show that there are two energy distributions in the discharge chamber, and a spatial non-uniformity of electron density due to the B×▽B drift of the top permanent magnets is observed.For optimization and accurate prediction of the amount of proton production in the multi-cusp ion source, analysis of the electron energy distribution function （EEDF） is necessary. A three dimensional particlein-cell with Monte Carlo collision （PIC-MCC） code based on the CHIPIC software platform are developed. The code is applied to the multi-cusp proton source. The results show that there are two energy distributions in the discharge chamber, and a spatial non-uniformity of electron density due to the B×▽B drift of the top permanent magnets is observed.

关 键 词：multi-cusp proton source EEDF PIC-MCC 

分 类 号：O572.341[理学—粒子物理与原子核物理] O242.2[理学—物理]