在线测量低能离子束电荷态和能量的新型探测器

基于加速器装置的离子与物质相互作用过程研究，在原子物理、材料、生物等诸多领域具有重要的科学意义和应用价值。本工作设计并研发了一种新型磁谱仪离子探测器，主要由高稳定性偏转磁铁、大面积位置灵敏探测器、空间匹配的散射腔室构成，可以准确在线测量不同离子的电荷态分布以及对应的能谱信息。基于HIRFL加速器装置，完成了该探测器装置的在线标定工作，获得了探测器位置信号与离子能谱之间的定量关系，给出了定标实验条件下该探测系统的最佳能谱精度和能量分辨率分别为0.1%及0.8%。

New Detector System for On-Line Measuring Charge State and Energy of Low Velocity Ions

The research on the interaction between ions and matter, based on the ions accelerator complex, play the important roles in both fundamental physics and the application aspects in many fields, such as atomic physics, material and biology researches. A novel magnetic spectrometer ion detector is developed, which is mainly composed of a high stability deflector magnet, a large-area position-sensitive detector and a space-matched scattering chamber. The new detector can accurately in-situ measure the ions’ charge state distribution and the corresponding energy spectrum. Based on the HIRFL accelerator, the calibration of the detector was completed by using the quasi-monoenergy ions and the quantitative relationship between the ion position and its energy was obtained. The optimal energy spectrum accuracy and energy resolution of the detector system are found as 0.1% and 0.8% respectively, which are shown in the calibration experiment.