摘要
采用自主研发的全三维PIC/MCC软件对JAEA 10A多峰负氢离子源进行系统仿真,分析了电极布局对H-体积产生效率的影响。模拟结果显示:放电功率一定的情况下,增加电极数目,高能电子导致的横向漂移相对减弱,进而得到相对均匀的H-束;但电子的相对利用率越低,导致H-体积产生效率较低。电极越靠近过滤磁区,高能电子导致的横向漂移相对增强,H-体积产生效率较低。改变电极数量,H-体积产生效率和空间均匀性不可兼得,电极远离磁过滤区,可实现双赢。
The JAEA 10A multi-cusp source discharge is simulated by the self-developed full 3D PIC/MCC software. The influence of the electrode layout on H- volume generation efficiency was analyzed. The simulation shows that with a certain discharging power, the crosswise drifting from high energy electrons will weaken relatively when the number of electrodes decreases, then the uniform H- beam will be obtained. However, the lower electrodes lead to a lower generation efficiency of the H- volume. When the electrodes are close to magnetic filtering region, the crosswise drifting will be strengthen relatively and the H- volume generation efficiency is quite low. With changing the number of electrodes, the high H- volume generation efficiency and the good space uniformity couldn＇t be obtained together. The electrodes far away from magnetic filtering region are the best choice.
出处
《核聚变与等离子体物理》
CSCD
北大核心
2017年第2期226-231,共6页
Nuclear Fusion and Plasma Physics
基金
四川省教育厅重点项目(16zd1121)
四川省科技创新苗子工程培育项目(2016012)
四川省科技创新苗子工程重点项目(2017RZ0058)
绵阳市科技计划项目(16G-01-13)
关键词
负氢离子源
粒子模拟
蒙特卡罗
磁漂移
体积产生效率
Negative hydrogen ion source
Particle-in-cell
Monte Carlo method
Magnetic drifting
Volumegeneration efficiency
