高空间分辨率质子微束空气离子束分析
In-air ion beam analysis with high spatial resolution proton microbeam
摘要：
在空气中进行离子束分析的同时保持微米空间分辨率的可能方法之一是增加离子的能量。为了探索这种方法的能力和局限性，我们已经测试了一系列的质子束能量（2 - 6兆电子伏）使用在空气中的STIM（扫描离子透射显微镜）设置。空间分辨率对质子能量的依赖性的测量进行了比较与SRIM模拟和建模的质子多次散射不同的方法。结果被用来选择实验条件，其中1微米的空间分辨率可以获得。高分辨率空气微束可用于核物理和高能物理中大型探测器的IBIC（离子束感生电荷）测试，否则无法在相对较小的微束真空室中进行测试。
英文摘要：
One of the possible ways to maintain the micrometer spatial resolution while performing ion beam analysis in the air is to increase the energy of ions. In order to explore capabilities and limitations of this approach, we have tested a range of proton beam energies (2 - 6 MeV) using in-air STIM (Scanning Ion Transmission Microscopy) setup. Measurements of the spatial resolution dependence on proton energy have been compared with SRIM simulation and modelling of proton multiple scattering by different approaches. Results were used to select experimental conditions in which 1 micrometer spatial resolution could be obtained. High resolution in-air microbeam could be applied for IBIC (Ion Beam Induced Charge) tests of large detectors used in nuclear and high energy physics that otherwise can not be tested in relatively small microbeam vacuum chambers.
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