单离子微束离子入射点定位
Beam position location for single-ion microbeam
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摘要: 为满足辐射实验的定位精确度要求，提出了一种对微束离子入射点进行捕捉和定位的方案。该方案根据离子束流轰击闪烁体能激发出光信号的特性，结合单离子微束装置的显微图像采集系统，通过对离子激发出的光斑进行图像采集分析实现了对离子入射点的定位。验证实验通过一种CR39膜记录离子辐射径迹， 采用的毛细玻璃管瞄准器内径为5 μm,长度为980 μm。实验得出了运用该方案进行入射点定位时装置的整体定位精度。Abstract: Target location accuracy is a key index for the microbeam irradiation. Therefore, a method for capturing and locating the microbeam position is offered. The microbeam position is identified by imaging the fluorescent spot excited when particles hit the scintillation foil. Using the image capture and analysis system, the fluorescent spot is analyzed to determine the microbeam position. Furthermore, experiments using CR39 nuclear track detector to measure the microbeam locating method are presented. The overall target location accuracy is measured when a borosilicate glass capillary with 5 μm inner diameter and 980 μm length is used as the microbeam collimator．
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Key words:
- single-ion microbeam /
- beam position locating /
- ion cluster
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