【摘要】 为改善潘宁离子源磁场均匀性和提高中子产额,通过模拟离子源内部磁场来设计磁路系统以改善粒子分布,获得阴极下方圆柱形磁体结构、阳极周围环形筒磁体结构、双磁环结构、多磁环结构、弧形环结构和加导磁结构等多种磁场模式设计结果及实验数据。实验表明模拟结果与实验数据符合较好;圆环形磁体比圆柱形磁体磁场分布更均匀;圆环数越多,磁场均匀效果越好;加导磁结构有明显固磁效果,可满足小型中子管潘宁离子源对磁场模式的要求。更多还原

【Abstract】 In order to improve the magnetic field uniformity of Penning ion source and increase the neutron yield,the internal magnetic field of the simulated ion source is used to design the magnetic circuit system to improve the particle distribution. A variety of magnetic field model design results and experimental data are given for the cylindrical magnet structure below the cathode,the annular cylinder magnet structure around the anode,the double magnetic ring structure,the multi-magnetic ring structure,the arc ring structure, and the magnetic permeability structure. The results show that Simulation results and experiments data is in good agreement,the magnetic field distribution of the circular ring magnet is more uniform than that of the cylindrical magnet. The more rings the better the magnetic field uniformity. The solid magnetic effect is obviously added to the magnetically conductive structure,which can meet the magnetic field mode requirements of the small neutron tube Penning ion source.更多还原