アインチェルレンズ内でのビーム軌道の空間電荷効果

概要

論文の詳細を見る
Trajectories of mono-energetie cylindrical beams of charged particles in decel-accel type einzel lens have been calculated for various beam intensities, using the digital computer. Results are illustrated with the exit beam radius R, exit angle θ and exit beam parameter R・tan θ as a founction of the space charge factor K_0. Under definit conditions, beams which are injected with small divergent angle are well focused and their exit radiuses are smaller than that of parallel ones. In the case of high intense ion beam, a slight difference of the initial condition of beam makes a great influence on the trajectory of charged particle. The einzel lens with short gap and long center electrode can effectively utilize for forcusing beams of various initial conditions. The effects of varying the boundary condition, the mesh size, the number of the iteration process and the voltage of the center electrode are also discussed.
山梨大学の論文