直列静電レンズ型（ＣＳＬ）ゲージにおける空間電荷を考慮した電子軌道のシミュレーション

Abstract

Computer simulation of electron trajectories in a Cascade Static Lens Gauge (CSLG) has been carried out in consideration of space charge effect. The space charge distribution was estimated by the accumulation of residence time of electrons in each mesh. It was confirmed that electron trajectories were spread by a proper amount of space charge, but trajectories have not been spread so to bump into anode electrodes. This is caused by the impossibility of electron emission from the filament due to the intense space charge around it. It is considered that this will be solved by the increase of initial velocity of emitted electrons.