Computer Simulation Of Slow Highly Charged Ion Grazing Incidence On The Lattice Al(111) Surface

Since a slow highly charged ion (SHCI) has extremely high charge and low velocity, its interaction with solid surface has different character from the ions with low charge. Therefore, with developing the technology producing SHCI, more and more attention was focused on the interaction between SHCI and solid surface.This article is bending itself to the computer simulation of the interaction of highly charged ion with metal surface under grazing angle. In the simulation, we mainly considering the below three major processes, including the image acceleration of highly charged ions, the charge exchange processes of highly charged ions with surfaces, the thermal vibration and displacement of target atom and their effect on the projectile's path, the energy loss of the projectile and so on.The main idea of the simulation is adopting Monte Carlo method and the classical over barrier model to simulate the randomicity of the charge exchange processes between projectile and metal and the dispersing of projectile's continuum movement. In each step, the movement of projectile is considered to a uniform acceleration.The leading point of this work is that it can give the formation of hollow atom and its intuitionistic picture of its change. Comparing the simulation result of image energy gain in relation to the initial charge state of the projectile and the outcome of staircase model and also the experiment result under the same condition, we find they all accord with each other very well. We can also get the satisfying comparison of reflection coefficient in relation to the initial charge state of projectile and the change of charge state of projectile with its distance from the solid surface with the other outcome.This article is mainly composed of three sections. One is devoted to the status quo and the background of the interaction of slow highly charged ions with surfaces;the other part considers the theory description of the interaction process;the final part will present our simulation results and its discussions.