Fig. 1. Stopping power and range of 1−100 MeV protons in aluminum calculated by SRIM.采用SRIM计算得到的1−100 MeV质子在铝中的阻止本领及射程

Fig. 2. Residual energies of the incident protons after they pass through the energy degrader with 64 kinds of combinations of 6 energy degrader plates.入射质子穿过64种不同降能片组合之后的能量

Fig. 3. Energy straggling degree of the resulting protons at each energy point produced by the energy degrader.质子经过降能器产生的各能点质子的能量岐离程度

Fig. 4. Full width at half maximum of the scattering angle of the resulting protons at each energy point produced by the energy degrader.经过降能器产生的各能点质子的散射角半高宽

Fig. 5. Variation of the residual energy after the protons with the energy deviation of 0.1 MeV directly provided by the accelerator pass through the energy degrader.加速器直接提供的质子能量偏差0.1 MeV时造成质子经过降能器后剩余能量的偏差情况

Fig. 6. Effects of the energy degrader for the protons at 100, 90, 80 and 70 MeV directly provided by the accelerator.降能器对加速器直接提供的100, 90, 80, 70 MeV 四种能量质子的降能效果

Fig. 7. Effects of the energy degrader using 6, 7 and 8 aluminum plates, respectively.降能器使用6, 7, 8片降能片时的降能效果