Fig. 1. Schematic diagram of proton radiography system.质子成像系统示意图

Fig. 2. Shape changed of proton bunch within certain angle-cuts as it passes through the collimation space: (a) z = 0 m; (b) z = 0.6 m; (c) z = 1.2 m; (d) z = 1.8 m; (e) z = 2.4 m. 一定截断角以内的质子束团在通过准直空间时的形状变化　(a) z = 0 m; (b) z = 0.6 m; (c) z = 1.2 m; (d) z = 1.8 m; (e) z = 2.4 m

Fig. 3. Diagram of parameters of proton radiography system.质子成像系统参数示意图

Fig. 4. Boundary lines of the target bunch when the angle-cut is 2 mrad and the object size is 5 cm.截断角为2 mrad、客体尺寸为5 cm时的目标束团边界线

Fig. 5. Aperture size varies with the angle-cut at the ports: (a) ; (b) . 端口处的孔径值随截断角的变化　(a) ; (b)

Fig. 6. Shape of aperture of the collimator: (a) x-y plane; (b) y-z plane. 准直器孔径的形状　(a) x-y平面; (b) y-z平面

Fig. 7. Diagram of the object: (a) The round copper plate; (b) the concentric spheres.客体示意图　(a)铜板; (b)同心球体

Fig. 8. Flux distribution after passing the round copper plate: (a) Angle-cut of 2 mrad; (b) angle-cut of 3.5 mrad.通过铜板的通量分布　(a)截断角为2 mrad; (b)截断角为3.5 mrad

Fig. 9. Flux distribution after passing the concentric spheres: (a) Angle-cut of 2 mrad; (b) angle-cut of 3.5 mrad.通过同心球的通量分布　(a)截断角为2 mrad; (b)截断角为3.5 mrad