Two-dimensional images of transmitted slow neon ions guided by nanocapillaries in polymer foils

We have measured two-dimensional images of 3.5–7 keV Ne7+ ions guided by PET nanocapillaries as a function of the deposited charge. The transmitted ion position and shape are found to change with the intensity evolution. After saturation of the guided ion intensity, the transmission profile is nearly isotropic and its angular width amounts to about 1°, which differs from previous measurements.