Demonstration of low energy proton radiography on an 11-MeV cyclotron

Lens focusedprotonradiograph on thin objects is demonstrated using an 11-MeVproton cyclotron at China Academy of Engineering Physics. Theproton beam exiting from the tested objects is focused onto the image plane by a magnetic lenssystem mitigating image blur caused by multiple Coulombscattering. Both simulations and experiments show that clear images can be obtained with a lenssystem for the objects with thickness up to 2.7 × 10−2 g/cm2 and the error for the arealdensity measurement ismeasured 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 –200μm of spatial resolution is achieved.

Source: Review of Scientific Instruments - November 18, 2016 Category: Physics Authors: Xiao Ding Zhang, Guo Jun Yang, Yi Ding Li, Tao Wei, Xiaozhong He, Liang Chao Zhao, Zhuo Zhang, Chaofan Ma, Xiaoguo Jiang and Jinshui Shi Source Type: research