Focusing effect of conical capillary on heavy ion beam

Mainly covering the following information: The energy distribution and angular distribution information in different energy ranges after the first scattering of the primary heavy ion beam upon collision with the capillary wall; The spatial distribution information of scattered ions on the target area; The halo and energy distribution information presented by multiple scattering on the target area; The polar angle distribution at a collision point in a recoil atomic capillary; The energy distribution and radius distribution of recoil atoms falling on the target area; The influence of air pressure in the chamber on the energy and trajectory of the core beam; SRIM calculates the energy loss of the core beam in 100Pa air