【摘要】 微束是由 9SDH 2串列加速器引出的高能离子 ,经过三元四极透镜聚焦后 ,得到线度为 μm量级的离子束 ;由多个探测器构成的探测系统 ,可进行PIXE ,RBS ,STIM等分析 ,便于核微探针系统开展与材料、环境、生物等学科交叉的研究 .为了获得尽可能小的束径 ,根据新核微探针系统的具体几何条件 ,进行了束流光学的模拟计算 ,找到了对不同能量、不同离子进行聚焦的合适的四极透镜参数 ,其结果直接指导新核微探针系统的安装和调试 .更多还原

【Abstract】 High energy ion beams accelerated by the tandem(9SDH 2) can be focused to a beam diameter about 1 μm by quadrupole triplet magnetic lens. The detection system consists of several detectors. Several ion beam analytical techniques, such as PIXE, RBS, STIM, etc. are available with the new SPM system. The facility can promote inter disciplinary researches of different fields including material science, environment science, geology and biology. In order to minimize the diameter of the ion beam, a simulation calculation of beam optics is carried out for the new SPM system. The calculation results are helpful to the installation of the whole microbeam system.更多还原