Numerical modeling of electron transport in a cylindrical cell

Abstract

Articles you may be interested inMonte Carlo calculations of electron transport in silicon and related effects for energies of 0.02-200 keV Model simulations of continuous ion injection into electron-beam ion source trap with slanted electrostatic mirrora) Rev. Sci. Instrum. 79, 02B908 (2008); 10.1063/1.2828061 Novel compact electrostatic ion-current detector using a self-collection method for secondary-electron suppression Rev. Sci. Instrum. 75, 3631 (2004); 10.1063/1.1788861Modeling of emitted current distribution and electron trajectories in the thin-film field-emission triode A physical and mathematical model is developed for the numerical simulation of electron transport in a multielectrode microcell with a circular emitter. Two circular grid electrodes are included in the model to control the electron beam. A target plate face electrode is considered as a secondary electron source. Electron beam transport in a self-consistent electric field is simulated using a cylindrical particle mesh code. Some typical examples are calculated to demonstrate the effectiveness of the proposed technique for optimization of beam control. The influence of a magnetic field on the static and dynamic characteristics of the microcell is also studied. Split anode difference current is predicted in a magnetic field and thus the microvacuum cell may be used as a magnetosensitive element.