Early experiments have evidenced that low-energy ions can be significantly guided through a single curved macrocapillary with a large bending angle, which seems impossible for a straight macrocapillary with the tilt angle equal to the bending angle. We here present the first simulation of the transmission of ions through curved macrocapillaries. The simulated results yield partial agreement with the experiments. It implies that the significant guiding can be attributed to the big curved charge patch formed on the capillary inner wall. Furthermore, the simulations predict a focusing effect on the transmitted ions that are distributed in a crescent-moon-like pattern.

中文翻译：

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8-keV Ar的模拟${}^{8+}$ 离子通过弯曲的玻璃大毛细管

早期的实验证明，低能量离子可以通过具有大弯曲角的单个弯曲大毛细管被有效地引导，对于倾斜角等于弯曲角的直大毛细管来说，这似乎是不可能的。我们在这里展示了离子通过弯曲大毛细管的传输的第一个模拟。仿真结果与实验部分吻合。这意味着有效的引导可以归因于在毛细管内壁上形成的较大的弯曲电荷斑块。此外，模拟预测了对以新月形样分布的透射离子的聚焦作用。