【摘要】 ns-200中子发生器采用的是高频离子源,面临着提高离子源的性能,增大引出束流的技术改造问题。为此开展了高频离子源的设计研制工作。高频离子源采用管道式引出结构和三圆筒单透镜聚焦系统。根据设计指标要求和离子光学原理,经过计算和优化,确定了引出系统和聚焦系统的主要参数。采用传输矩阵和束矩阵(σ矩阵)相结合的数值计算方法,运用LEADS软件模拟计算了束流传输过程,模拟计算的结果与理论设计相吻合。在ns-200中子发生器上进行了初步的实验,表明设计的高频离子源束流光学系统是合理的。更多还原

【Abstract】 A novel type of radio frequency(RF) ion source has been successfully developed and fabricated to meet the technical requirements of the ns-200 neutron generator.The ion source mainly consists of the pipe-shaped ion-beam extraction electrode,and the equidiameter,three-cylinder electrostatic unipotential lens system.The structure of the ion source was theoretically calculated,based on ion optics theory to optimize the design.Moreover,the transport of the ion beam was numerically calculated by integrating the transport matrix and σ matrix,and simulated with the software package LEDADS.The prototyped ion source installed in the ns-200 neutron generator was tested.The preliminary field-test results show that the ion source is capable of doing a good job.更多还原