Article ID Journal Published Year Pages File Type
1681908 Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2012 4 Pages PDF
Abstract
The interaction of 16 keV Cu− ions with Al2O3 nano-capillaries of 50 nm diameter and 10 μm length was studied. The angular and charge state distributions of the transmitted particles were measured by a position-sensitive microchannel plate detector. It shows that transmitted particles appear as two peaks and consist of three charge states, Cu−, Cu0 and Cu+. As the tilt angle increases, more Cu− ions lose electrons resulting in the formation of Cu0 and Cu+ during multiple collisions with the capillary walls. Unlike previously reported results on highly charged ions, keV-energy Cu− ions undergo significant charge exchange processes with the inner walls of the capillaries. This indicates that the guiding effect is absent in the negative ion transmission under the very low ion current conditions.
Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
Authors
, , , , , , , , ,