基于11MeV回旋加速器的低能质子照相实验
基于11MeV回旋加速器的低能质子照相实验
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DOI：
10.1063/1.4967459
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发表时间：
2016
影响因子：
1.6
通讯作者：
Li Yiding
中科院分区：
文献类型：
--
作者：
Zhang Xiaoding;Yang Guojun;Li Yiding
利用中国工程物理研究院11 MeV质子回旋加速器实现了薄物体的透镜聚焦质子照相。磁透镜系统将从被测物体射出的质子束聚焦到像面上，以减轻多次库仑散射引起的像模糊。仿真和实验结果表明，对于厚度达2.7 × 10−2 g/cm 2的物体，采用透镜系统可以获得清晰的图像，面密度测量误差小于2.3%。对于厚度在2.7 × 10−3 g/cm 2和2.7 × 10−2 g/cm 2之间的物体，可以实现100-200 μm的空间分辨率。
Lens focused proton radiograph on thin objects is demonstrated using an 11-MeV proton cyclotron at China Academy of Engineering Physics. The proton beam exiting from the tested objects is focused onto the image plane by a magnetic lens system mitigating image blur caused by multiple Coulomb scattering. Both simulations and experiments show that clear images can be obtained with a lens system for the objects with thickness up to 2.7 × 10−2 g/cm2 and the error for the areal density measurement is measured to be less than 2.3%. For the objects with thickness between 2.7 × 10−3 g/cm2 and 2.7 × 10−2 g/cm2, 100–200 μm of spatial resolution is achieved.