Semi-empirical modelization of charge funneling in a np diode

A semi-empirical model of charge funneling in a n+p diode hit by a heavy ion is proposed. An electric field is induced in the plasma column by the equilibrium depleted region, taken as a plate capacitor. It separates carriers and drives a current in the substrate. Based on simplifying assumptions, transient current, funneling length and collection efficiency are determined. Calculated values are found in good agreement with available experimental data. The purpose of this model is to provide a physical interpretation of charge collection mechanism, and to be extrapolated to more complex structures.<
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