Video of angular distribution of  Ar7+ ions guided through polyethylene teraphthalate nanocapillaries

Capillary video

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The video was taken by an MCP detector. The capillaries were tilted by 5º with respect to the ion beam in the horizontal plain (see experimental arrangement). Upper spot is due to the created neutrals, ions are deflected down by an electric field. You can observe oscillating structures in the ions' distribution due to multiple charge patches developing in the capillary walls after switching on the beam. The deflecting electric field is switched off at the end, and the ions merge with neutrals. (Small spot in the left is due to an artificial signal  used only for checking signal transmission.)