中性粒子标定源中聚焦系统的研究

Research on focusing system in the neutral particle calibration source

摘要:

设计了用于中性粒子标定源的聚焦系统.利用三维电磁仿真软件CST对束流在中性粒子标定源中的输运情况进行了模拟，研究了单透镜与加速管之间的距离、聚焦电压和加速电压的改变对束流轨迹的影响.在离子源测试装置上利用塑料闪烁体对束流剖面进行了初步测定，测试结果与模拟计算相符合.文中得到的数据对中性粒子分析器的标定具有重要参考价值.

Abstract:

A focusing system for neutral particle calibration source has been designed. Three dimensional electromagnetic simulation software CST has been used to simulate the transmission of the beam in the neutral particle calibration source. The distance between the single lens and the accelerating tube, as well as the influence on the focus voltage and the acceleration voltage on beam trajectory have been investigated. In addition, a plastic scintillator has been used to preliminary measure the profile of the beam flow on the ion source testing device. The experimental results are consistent with the simulation calculation, and our work has important reference value for the calibration of neutral particle analyzer.