Implantação de uma linha de colisões atômicas e estudos de emissão, focalização e detecção de íons positivos provenientes da mistura de Li2CO3, SiO2 e Al2O3

Abstract

In order to establish an experimental research line on Atomic Collisions (study of ion/atom, molecule scattering) and Surface Physics (implantation of techniques of surface analysis by impact of ions) at the Physics Department of the Federal University of Juiz de Fora, we are building an electrostatic linear accelerator of low energy. This apparatus is basically composed by a thermionic ion source of Li positive ions, an extraction stage and an acceleration stage of them. In this work, we will present the thermionic source characteristics, the electric circuit set up which allows the performance of emission, extraction and acceleration stages, the vacuum and detection systems set up and the measurements concerning thermionic source emission, extracted beam focalization and ion current detection, in order to find the configuration which optimizes the functionality of this apparatus.