Calculation of the vertical electron attachment energy of carbon dioxide: Continuum states for negative ions

The outdoor insulator is commonly exposed to environmental pollution. The presence of water like raindrops and dew on the contaminant surface can lead to surface degradation due to leakage current. However, the physical process of this phenomenon is not well understood. Hence, in this study we develop a mathematical model of leakage current on the outdoor insulator surface using the Nernst Planck theory which accounts for the charge transport between the electrodes (negative and positive electrode) and charge generation mechanism. Meanwhile the electric field obeys Poisson’s equation. Method of Lines technique is used to solve the model numerically in which it converts the PDE into a system of ODEs by Finite Difference Approximations. The numerical simulation compares reasonably well with the experimental conduction current. The findings from the simulation shows that the conduction current is affected by the electric field distribution and charge concentration. The rise of the conduction current is due to the distribution of positive ion while the dominancy of electron attachment with neutral molecule and recombination with positive ions has caused a significant reduction of electron and increment of negative ions.

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Measurements of the Mobilities of the Negative Ions in Oxygen and in Mixtures of Oxygen with the Noble Gases, Hydrogen, Nitrogen, and Carbon Dioxide

Review of Scientific Instruments ◽

10.1063/1.1715976 ◽

1957 ◽

Vol 28 (9) ◽

pp. 684-689 ◽

Cited By ~ 30

Author(s):

E. W. McDaniel ◽

H. R. Crane

Keyword(s):

Carbon Dioxide ◽

Noble Gases ◽

Negative Ions

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Measurement of electron attachment in oxygen-methane and oxygen-carbon dioxide mixtures

10.2172/4199478 ◽

1960 ◽

Cited By ~ 1

Author(s):

L. B. O'Kelly ◽

G. S. Hurst ◽

T. E. Bortner

Keyword(s):

Carbon Dioxide ◽

Electron Attachment

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Continuum Modeling of Charged Particle Transport: RF Breakdown and Discharges of SF6

MRS Proceedings ◽

10.1557/proc-68-243 ◽

1986 ◽

Vol 68 ◽

Cited By ~ 3

Author(s):

Brian E. Thompson ◽

Herbert H. Sawun ◽

Aaron Owens

Keyword(s):

Electric Fields ◽

Electron Attachment ◽

Negative Ions ◽

Rate Coefficients ◽

Rf Discharge ◽

Continuity Equations ◽

Positive Ions ◽

Discharge Model ◽

Rf Breakdown ◽

Charged Particle Transport

AbstractContinuity equations for the concentration of electrons, positive ions, and negative ions were constructed and solved to predict rf breakdown voltages and the electrical properties of SF, discharges.These balances for the three types of charged species include terms for convection (electric field-driven fluxes), diffusion, and reactions (ionization, electron attachment, and negative-positive ion recombination).The mobilities, diffusivities, and reaction rate coefficients necessary for the rf discharge model are based on reported measurements and calculations of these parameters in dc electric fields.The electric fields developed in the rf discharge are calculated from Poisson's equation and applied voltage conditions.Predictions based on this model are compared with measured rf breakdown characteristics of SF6.

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