Abstract

The dynamical transmission of intermediate-energy protons through a polycarbonate (PC) conical capillary with taper angle from 0.48° to 2° are simulated. The results show that for small taper angle of 0.48°, the transmission of 100 keV protons is dominated by the deposited-charge-assisted specular reflection. This reflection effect decreases with the increase of the taper angle. When the taper angle is increased to 2°, the transmission of the protons is mainly influenced by small angle scattering, which is consistent with the experimental data. The asymptotic transmission rate decreases with the increase of the capillary taper angle. These results suggest that the deposited-charge-assisted specular reflection is significant in focusing several-hundred-keV protons.

Graphical abstract

中文翻译：

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数百keV质子通过PC锥形毛细管动态传输的锥角依赖性

摘要

模拟了中能质子通过锥角为0.48°至2°的聚碳酸酯（PC）锥形毛细管的动态传输。结果表明，对于0.48°的小锥角，100 keV质子的透射主要由沉积电荷辅助的镜面反射决定。该反射效果随着锥角的增加而减小。当锥角增加到2°时，质子的传输主要受到小角度散射的影响，这与实验数据一致。渐近传输率随着毛细管锥角的增加而减小。这些结果表明，沉积电荷辅助的镜面反射在聚焦几百个keV质子方面很重要。

图形概要