Measurement of conductivity and charge storage in insulators related to spacecraft charging

Frederickson, A. R.; Dennison, John

doi:10.1109/ceidp.2003.1254785

Cited by 21 publications

(33 citation statements)

References 7 publications

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“…This electric field is the deep dielectric charging field. ESD is probable to occur when the electric field is higher than the typical dielectric breakdown, 1×10 7 V/m [17][18][19]. The higher the electric field is, the more likely ESD may occur and the larger magnitude of pulse may be.…”

Section: Simulation Process and Resultsmentioning

confidence: 99%

“…In general, the tendency shows that electric field strength rises while the electrons flux increases and the temperature declines. Furthermore, as it is accepted by most that it is risky for the electric field to exceed 10 7 V/m [17][18][19], the electric field is expected to be lower than this value. We regard this as a critical value, below which, few discharges would occur.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A simulation of deep dielectric charging induced by dielectric temperature and energetic electrons

Min

et al. 2010

2010 10th IEEE International Conference on Solid Dielectrics

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In this paper, a computer numerical simulation of onedimensional deep dielectric charging (DDC) of spacecrafts induced by temperature and energetic electrons has been developed. It provides a method for spacecraft engineers to analyze the phenomena of DDC in spacecrafts and then to predict whether or when electrostatic discharging (ESD) will occur. The simulation code is developed to analyze the influence of different magnitude of dielectric temperature and energetic electrons flux on deep dielectric charging/discharging occurrence. In the simulation, we find that there exists an ESD inception energetic electron flux threshold. The flux threshold decreases with the decrease of dielectric temperature. It is interesting that there exists a critical dielectric temperature (250 K for low-density polyethylene) in the DDC process. Below the critical temperature or above that, respectively, the energetic electron flux and the dielectric temperature are the dominated influencing factors in the DDC process. Then, considering the DDC electric field and the charging time, we present a rough prediction of discharging occurrence probability with varied flux of energetic electrons and dielectric temperature.

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Section: Simulation Process and Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A simulation of deep dielectric charging induced by dielectric temperature and energetic electrons

Min

et al. 2010

2010 10th IEEE International Conference on Solid Dielectrics

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“…Electrons will be injected into and migrate in the upper half energy band [28]. In the meantime, the surface potential will decay in time [9], [11]. The SPD curves can be divided into different parts, which are resulted by different physical processes, respectively.…”

Section: Uct Modelmentioning

confidence: 99%

“…Frederickson et al [9]- [11] developed a charge storage decay resistivity test method to study the ohmic resistivity of highly insulating materials. Fitting the SPD curves by the charge depolarization and conduction model, they found that the ohmic resistivity of polyimide is several order higher than the results obtained by the ASTM method.…”

Section: Introductionmentioning

confidence: 99%

Investigation Into Surface Potential Decay of Polyimide by Unipolar Charge Transport Model

Min

Cho

et al. 2013

IEEE Trans. Plasma Sci.

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To predict spacecraft charging levels and mitigate electrostatic discharges, it is very important to understand the charge transport properties of highly insulating materials such as polyimide. The combination of surface potential decay (SPD) experiment and unipolar charge transport (UCT) model investigates the charge transport properties of polymide. In a simulated space environment chamber, the SPD experiments are performed on polymide. After irradiated by electron beams, the surface potential distributions of the sample are measured by a noncontact potential probe (Trek). The UCT model that consists of relaxation polarization, charge injection, charge migration, charge trapping, and detrapping processes simulates the SPD results. In the numerical UCT model, we solve the charge continuity equation by Runge-Kutta discontinuous Galerkin method and Poisson's equation by boundary element method. The least square error between the experimental and the simulated SPD results is searched by genetic algorithm (GA). From the GA calculation, we optimize the charge transport parameters of polyimide. Then, we calculate the space charge evolution properties during the SPD process of polyimide by the UCT model. These charge transport parameters, then, can be used to study the surface charging or deep dielectric charging of the insulator.Index Terms-Charge transport properties, polyimide, surface potential decay (SPD), unipolar charge transport (UCT).

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“…Charge/discharge effects are complex processes related to the radiation parameters (particle catalogues, flux, energy, etc. ), charge deposition and diffusion process in dielectric materials, secondary electrons and /or ions emission, photo electrons emission, radiation-induced conductivity (RIC) and dielectric properties of materials [2][3][4][5]. Hence, RIC is an additional and supplement part of the conductivity of the dielectric material due to ionization effects under the radiation of energetic photon and charged particles (electrons, protons and so on).…”

Section: Introductionmentioning

confidence: 99%

Investigation on the radiation induced conductivity of space-applied polyimide under cyclic electron irradiation

Long

Sun

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

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Measurement of conductivity and charge storage in insulators related to spacecraft charging

Cited by 21 publications

References 7 publications

A simulation of deep dielectric charging induced by dielectric temperature and energetic electrons

A simulation of deep dielectric charging induced by dielectric temperature and energetic electrons

Investigation Into Surface Potential Decay of Polyimide by Unipolar Charge Transport Model

Investigation on the radiation induced conductivity of space-applied polyimide under cyclic electron irradiation

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