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Recently, based on our successful exhibition of charge packets phenomenon under a series of electric field intensity (ranges from 10 kV/mm to 50 kV/mm) in LLDPE thin films (500 µm), the retrival of real charge carrier mobility was attempted to work out using numerical methods. To make the migration of charge packets in both numerical simulations and experimental measurements incline to unanimous,...
In this research, a reliable negative differential mobility model was retrieved based on the experimental data using an iteration method. The experimental charge packet profiles were obtained by the polarization of the electron beam irradiated LDPE films (applied electric field intensity ranges from 30 kV/mm to 50 kV/mm). At the beginning of the research, a preliminary description of mobility-electric...
Numerous numerical simulations and analysis were performed to understand the phenomenon of space charge packets. In theory, the simulation of charge packet transport is based on the three physics principles: transport equation, continuity equation and Poisson's equation. As a key equation to simulate charge packet problem, it's very important to select an appropriate numerical algorithm to solve transport...
Packet-like space-charge behavior in low density polyethylene (LDPE) under dc field was reported. It was found that when a high electric field above several kV/mm was applied to LDPE, a large amount of positive packet-like charge was appeared near the anode. The packet-like charge moved towards cathode and disappeared near the cathode. In this paper, a numerical simulation is proposed to discuss the...
The effect of electron beam radiation on permittivity of polymethyl methacrylate (PMMA) samples is investigated. Experimental results show that the variance of permittivity in irradiated PMMA is mainly determined by two factors. One is porosity of the material. The irradiating process increases the porosity due to the escape of the small molecule (e.g. CO, CO2, CH4 etc.) produced by material degradation...
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