Transmission of 1-MeV protons through a conical borosilicate macrocapillary was simulated. In present simulations we included atomic scatterings and patch deflections, different from pioneer work where only the former was considered. The simulated results provide deep insight into the transmission mechanisms of MeV ions through a conical macrocapillary: for tilt angles smaller than the taper angle, the enhanced transmission is fully governed by atomic scatterings, whereas beyond the taper angle the patch deflections are of some importance. Moreover, the strength of patch deflections was found to first increase to a maximum and then drop to zero as the tilt angle increases. This is different from those of the atomic scatterings and geometric laws, which both monotonously decrease with the tilt angle. The core and halo structure in the transmission profile unique to the MeV ions through the conical capillary can be formed only for smaller beam divergence.

模拟了1-MeV质子通过锥形硼硅酸盐大毛细管的传输。在目前的模拟中，我们包括了原子散射和面片偏转，这与仅考虑前者的先驱工作不同。仿真结果为深入了解MeV离子通过圆锥形大毛细管的传输机理提供了帮助：对于小于锥角的倾斜角，增强的透射完全由原子散射控制，而在锥角之外，膜片挠度则具有重要意义。此外，发现贴片偏转的强度首先增加到最大，然后随着倾斜角度的增加而下降到零。这与原子散射和几何定律不同，原子散射和几何定律都随倾斜角单调减小。