Models of charge transport in electron-beam irradiated insulators

Sessler, G. M.; Figueiredo, M.T.; Ferreira, G. F. Leal

doi:10.1109/tdei.2004.1285887

Cited by 96 publications

(59 citation statements)

References 33 publications

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“…A comparison of two analytical approaches applicable to cases where carrier drift, carrier trapping, and conductivity are to be taken into account is given in Ref. [20]. In future work it is planned to apply an analytical treatment of this kind to the present data.…”

Section: Resultsmentioning

confidence: 99%

Additives to improve the electret properties of isotactic polypropylene

Mohmeyer

Behrendt²,

Zhang

et al. 2007

Polymer

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Section: Resultsmentioning

confidence: 99%

Additives to improve the electret properties of isotactic polypropylene

Mohmeyer

Behrendt²,

Zhang

et al. 2007

Polymer

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“…Recombination processes involving mobile and trapped carriers of different sign can be taken into account. Irradiation is described following the socalled 'Generation-Recombination' model (GR) in reference [7], i.e. it takes into account the generation of electron/hole pairs due to energy loss of primary electrons as well as the electron deposition in the irradiated zone, and the recombination of these charges.…”

Section: Model Equationsmentioning

confidence: 99%

“…They can be written, neglecting the time and space dependency of the densities: -for mobile electrons : S 0 to S 3 refer to the recombination coefficients (see figure 3). G(x) is the electron/hole pair generation, and is of the form [7]:…”

Section: Model Equationsmentioning

confidence: 99%

“…With these experimental tools, it is now possible to observe the dynamic of charging and discharging in electron-beam irradiated materials. On the other hand, a number of works on theoretical background and simulation has been done in order to understand and reproduce the behaviour of charge in electron beam irradiated polymers [6][7][8][9]. Our very aim is to develop space charge modelling in electron beam irradiated materials in nonstationary conditions through an approach that closely associates experiment and numerical simulation.…”

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confidence: 99%

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Charge transport modelling in electron-beam irradiated dielectrics: a model for polyethylene

Roy¹,

Baudoin²,

Griseri³

et al. 2010

J. Phys. D: Appl. Phys.

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This paper proposes a numerical model for describing charge accumulation in electron-beam irradiated low density polyethylene. The model is bipolar, and based on a previous model dedicated to space charge accumulation in solid dielectrics under electrical stress. It encompasses the generation of positive and negative charges due to the electron beam and their transport in the insulation. A sensitivity analysis of the model to parameters specific to electron beam irradiation is performed in order to understand the impact of each process on the space charge distribution. At last, a direct comparison between time dependent space charge distribution issued from the model and from measurements is performed. The transport parameters used for the simulations are the same as those optimized for transportation in polyethylene under an external electric field giving a robustness in the modelling approach because of the constrains on fitting parameters that must comply to a set of experimental results.PACS Numbers: 72.20Ht, 72.20Jv 1. Introduction Solid dielectrics used as thermal blanket on geostationary satellites are submitted to the flow of several types of charged particles, and particularly to electrons. These materials can accumulate charges, building up the potential inside the dielectric, meaning a potential difference between different parts of the satellite. Electrostatic Surface Discharge (ESD) can occur, leading to possible damages of the electronics of the satellite [1]. In order to prevent such ESD to happen, it is necessary to understand the dynamics of the charge transport in solid dielectrics used in space environment. A number of studies have been carried out in this domain. Some are experimental, measuring the surface potential of the irradiated samples, the current flow during irradiation [2] and the space charge distribution after irradiation [3]. Recently, two original set-ups [4-5] to measure space charge distribution in electronbeam irradiated samples have been developed on the basis of the Pulsed Electro-Acoustic (PEA) method. With these experimental tools, it is now possible to observe the dynamic of charging and discharging in electron-beam irradiated materials. On the other hand, a number of works on theoretical background and simulation has been done in order to understand and reproduce the behaviour of charge in electron beam irradiated polymers [6][7][8][9]. Our very aim is to develop space charge modelling in electron beam irradiated materials in nonstationary conditions through an approach that closely associates experiment and numerical simulation. Within the first part of this paper, we briefly review the state-of-the-art on modelling charge transport in synthetic insulations under electron beam irradiation in order to establish the position of our approach. Then, we describe the proposed model, which has been adapted from a previous one [10] developed for space charge conduction in a Low Density Polyethylene (LDPE) under DC stress. The same set of transport parameters has b...

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“…The charge distribution and motion induced by ion beam poling and corona poling across air gaps have been studied extensively. [5,6] Studies based on dielectric constant measurements have also been conducted. [7] These polymer films have been studied by a variety of methods including Thermally Stimulated Discharge (TSD) [4], Second Harmonic Generation (SHG), pyroelectric currents, [8] and thermal and acoustic waves.…”

Section: Introductionmentioning

confidence: 99%

Modeling of optical waveguide poling and thermally stimulated discharge (TSD) charge and current densities for guest/host electro-optic polymers

Watson

Ashley

Abushagur

2004

IEEE J. Quantum Electron.

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Absfracf-A charge density and current density model of a waveguide system has been developed to explore the ef€ects of electric field electrode poling. An optical waveguide may be modeled during poling by considering the dielectric charge distribution, polarization charge distribution, and conduetion charge generated by the poling field. These charge distributions are the source of poling current densities. The model shows that boundary charge current density and polarization current density are the major source of currents measured during poling and thermally stimulated discharge These charge distributions provide insight into the poling mechanisms and are directly related to E , , and, g.Initial comparisons with expvimntpl data show excellent correlation to the model results.

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Models of charge transport in electron-beam irradiated insulators

Cited by 96 publications

References 33 publications

Additives to improve the electret properties of isotactic polypropylene

Additives to improve the electret properties of isotactic polypropylene

Charge transport modelling in electron-beam irradiated dielectrics: a model for polyethylene

Modeling of optical waveguide poling and thermally stimulated discharge (TSD) charge and current densities for guest/host electro-optic polymers

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