2006
DOI: 10.1088/0022-3727/39/7/014
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Abstract: A numerical model for describing bipolar charge transport and storage in polyethylene has been developed recently. The present paper proposes a comparison of the model outputs with experimental data in three different direct current (DC) voltage application protocols (step field increase and polarization/depolarization schemes). Three kinds of measurement have been realized for the three different protocols: space charge distribution using the pulsed electro-acoustic method, external current and electrolumines… Show more

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Cited by 154 publications
(171 citation statements)
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“…And J h is the injection current density from the anode. With high voltage applied, charge injection behavior at the metal-polyethylene interface was verified conforming to Schottky injection mechanism 9,20,21 , which has already been applied into some previous modelling works on polyethylene 18,22,23 . Such conduction mechanism demonstrates that barrier height at the electrode-dielectric interface is lowered by the applied field and image charge force so that enhanced current density from electrodes takes place.…”
Section: Volts-on Conditionsupporting
confidence: 57%
“…And J h is the injection current density from the anode. With high voltage applied, charge injection behavior at the metal-polyethylene interface was verified conforming to Schottky injection mechanism 9,20,21 , which has already been applied into some previous modelling works on polyethylene 18,22,23 . Such conduction mechanism demonstrates that barrier height at the electrode-dielectric interface is lowered by the applied field and image charge force so that enhanced current density from electrodes takes place.…”
Section: Volts-on Conditionsupporting
confidence: 57%
“…The bipolar model developed is derived from [10]. It is one-dimensional, function of the position in the dielectric, and based on the scheme presented in figure 3.…”
Section: Model Equationsmentioning
confidence: 99%
“…This coefficient is difficult to determine experimentally, for the type of material under study. It has been calculated in [6] as being function of the deposited energy rate per unit area W: (10) e is the elementary charge, N the area under the normalized dose rate and has been calculated from figure 4b (N=0.585); r corresponds to the irradiated region (490µm), and E 0 is the mean energy required to create a pair. We retained the value of E 0 =30 eV given in [6].…”
Section: Sensitivity Analysis To Irradiation Parameters 431 Electrmentioning
confidence: 99%
“…18,30 Such work led to a set of parameters, reported in Table II that appears suitable to describe the behavior of LDPE. The first objective of this work is to compare the outputs of the two models for initial conditions that are as close as possible.…”
Section: Resolution and Applicationmentioning
confidence: 99%
“…As an experimental basis, we have considered the charging and discharging behaviors of a 150 m thick LDPE film with 40 kV/ mm applied field and 3 h of charging/discharging time at room temperature. Ex- perimental data on space charge measurements 18 have been obtained by the pulsed electroacoustic ͑PEA͒ technique. The results produced by either model cannot be directly compared to experimental data, especially the space charge profiles obtained by the PEA method, firstly because only internal charges are produced by the simulation that do not influence charges on the electrodes; secondly, profiles obtained by the PEA method are, as with any other technique, accompanied by uncertainty in the position of the charges.…”
Section: Comparison Of Model Ouputsmentioning
confidence: 99%