Radiation induced conduction in Kapton H film

The current-voltage characteristics of an 8- mu m-thick Kapton-H sample irradiated by a 45-keV penetrating electron beam have been measured for a range of beam current densities (1-12 nA/cm/sup 2/). The experimental results are consistent with a model which predicts the current to be dependent linearly on voltage at low voltage (ohmic regime), quadratically at intermediate voltages (space-charge-limited regime), and exponentially at higher voltages (trap-filled-limit regime). This model emphasizes the role of injected space charge and the filling traps in the forbidden band over field-dependent Poole-Frenkel and Schottky-barrier models proposed by others.<
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