Technology Description
Interactions with unwanted electrons are a major limiting factor in the performance of ion accelerators. A main source of these electrons is collisions at grazing incidence between the ions and the beam pipe walls. Computer… codes in the heavy-ion fusion community presently do not have the capability to model grazing-incidence collisions accurately. This project will develop accurate numerical models of grazing-incidence collisions between ions and walls. The improved models would provide heavy-ion fusion simulation codes with an ability to determine ways for mitigating the effects of unwanted electrons. In Phase I, a model of surface roughness was implemented in an ion-material interaction code, a model of electron yield was derived from the surface roughness model, and the electron yield model was validated against experimental results.
