A Methodology of Field-Emission Modeling with Space-Charge Effects

摘要

In this paper, we present a methodology for modeling and simulating 3D field-emission devices (FED) with space-charge effect. This approach applies an accelerated boundary-element-method (BEM) electrostatics solver and an adaptive explicit integrator. The charges emitted from the tip are evaluated as the function of the surface electric field distribution on the tip by the Fowler-Nordheim equation. The displacement and velocity of emitted particles in each time step is calculated by the Runge-Kutta integration method. The results by this methodology are verified with the results by a commercial electromagnetic package MAGIC. The simulation results show that the approach in this study is efficient and accurate in solving electrostatic problems with space charge effect.