The shaping and focusing of a Ne⁷⁺ ion beam by transmission through an array of nanocapillaries of rectangular cross section in mica is studied both by experiments and simulations. The transmitted angular profiles of the beam are measured as they develop with charging-up the rectangular capillaries by ion impact and compared with rhombic capillaries of different parameters in mica. Thereby it is found that the profiles after transmission through rectangular capillaries degrade with charging them up. This is in contrast to our previous findings [Phys. Rev. A. 86, 022,901 (2012)] with rhombic capillaries, where the transmitted angular profiles only shift by charging-up. The reasons for that and the features of the tailored shapes of the transmitted ion beams will be discussed here, supported by simulations.

通过实验和模拟研究了通过传输穿过云母中矩形横截面的纳米毛细管阵列对Ne ⁷⁺离子束的成形和聚焦。测量光束的透射角轮廓，因为它们随着通过离子冲击对矩形毛细管充电而发展，并与云母中不同参数的菱形毛细管进行比较。从而发现在通过矩形毛细管传输之后的轮廓随着对它们充电而退化。这与我们之前的发现相反 [ Phys. 修订版 A. 86, 022,901 (2012)] 具有菱形毛细管，其中传输的角轮廓仅通过充电而改变。其原因以及传输离子束的定制形状的特征将在此处讨论，并得到模拟的支持。