ESA's tools for internal charging

Sorensen, J.; Rodgers, D.; Ryden, K.A.; Latham, Paul; Wrenn, G. L.; Lévy, L.; Panabiere, G.

doi:10.1109/23.856470

Cited by 53 publications

(29 citation statements)

References 4 publications

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“…2 It is known that dipole relaxation completes before other mechanisms. 22 This is probably related to the first crossover in the scaling exponent. The other two crossovers in ␣ might be due to a relaxation caused by heterogeneities and the trapping of charge carriers.…”

Section: Simulationmentioning

confidence: 98%

Simulation of transient current through PMMA thin films based on a random walk model

et al. 2006

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A piecewise continuous, time dependent diffusive coupling in a classical one-dimensional randomly pinned charge density wave model has been used for the analysis of experimentally observed transient current data for polymethyl methacrylate. Satisfactory agreement has confirmed that this can be a dynamical model for the behavior of the transient current. The analysis also suggests the presence of three different regimes in the decay of the transient current.

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Section: Simulationmentioning

confidence: 98%

Simulation of transient current through PMMA thin films based on a random walk model

et al. 2006

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“…Equation (1) and (2) mean that the newly injected charges per unit time will leak away entirely by conduction current and the charge density holds steady in equilibrium state. Equation (3) shows the relation between the field and potential. Equation (4) is conductivity mode [1], [6]- [10].…”

Section: B Electric Field Computationmentioning

confidence: 99%

“…There exist several software tools which enable spacecraft designers to predict the sensitivity of spacecraft structures to internal charging effects, such as DICTAT [1], [3], NUMIT [4] and ATICS (Assessment Tool of Internal Charging for Satellite) [5], [6]. Their common points are that they are able to compute maximum electric field for planar or cylindrical dielectric and assess discharge risk by means of comparing between electric field and breakdown threshold.…”

Section: Introductionmentioning

confidence: 99%

A 3-dimensional model of internal charging simulation

Tang

Zhong

Zhang

et al. 2013

2013 14th European Conference on Radiation and Its Effects on Components and Systems (RADECS)

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To break through the limitation of the traditional 1-dimensional (1-D) method of internal charging computation, a 3-D calculation model of internal electric field and potential for arbitrary configuration dielectric with complex boundary conditions is developed. It includes two steps: 3-D electron transport simulation and internal electric field computation. The transport simulation, which aims for obtaining electron deposition and dose rate distribution, is implemented by a self-developed software founded on GEANT4. And the calculation of 3-D internal electric field, which takes above transport results as input, is conducted through solving a set of electrostatic equations by the software COMSOL Multiphysics. In this paper, this 3-D simulation model applied to a typical printed circuit board grounded on a rectangular circuit and cylindrical pin will be presented. For purpose of comparison, a simpler 1-D planar dielectric wholly grounded on the back surface is simulated in the same method. Finally, the electric field computed by the 3-D algorithm is much larger than the 1-D simplified method widely used at present and hence the 1-D method may neglect crucial risk. Besides, the following conclusions are drawn: grounding has significant influence on electric field distribution, and the maximum field generally occurs at grounding edges or corners. Increasing the curvature radius of the circuit corner can reduce the field and the discharge risk.Index Terms -3-D simulation, internal charging, internal electric field, GEANT4

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“…Here, the number of electrons stopping in each of the plates per second was used to determine the total current deposited. The SURF plates were also modeled using DICTAT [9], a 1-D dielectric-charging model developed by QinetiQ, UK. This allows the charging currents expected from the AE-8 MIN spectrum to be determined directly.…”

Section: Charging Currentsmentioning

confidence: 99%

Galileo GIOVE-A MEORAD Results and Analysis

Taylor

Underwood

Evans

et al. 2008

IEEE Trans. Nucl. Sci.

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The Giove-A spacecraft carries two radiation monitors, CEDEX, built by the University of Surrey and Merlin, built by QinetiQ, to study the radiation environment encountered in the Galileo orbit. The two monitors have been functioning since the beginning of the mission and have measured protons, heavy ions and electrons. The electron environment has been found to be highly variable and driven by solar interactions. Comparisons with AE-8 indicate that the electron energy spectrum for the period measured was somewhat harder than that expected from the model. A series of large Solar proton events were detected in December 2006, registering as enhanced fluxes of protons, heavy ions and also triggering a large enhancement in the outer electron belt. Comparisons with POLE and INTEGRAL/IREM show an improved spectral match over AE-8

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ESA's tools for internal charging

Cited by 53 publications

References 4 publications

Simulation of transient current through PMMA thin films based on a random walk model

Simulation of transient current through PMMA thin films based on a random walk model

A 3-dimensional model of internal charging simulation

Galileo GIOVE-A MEORAD Results and Analysis

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