Effect of an electric field on electron attachment to sulfur hexafluoride, nitrous oxide, and molecular oxygen in liquid argon and xenon

1976 ◽  
Vol 80 (23) ◽  
pp. 2556-2559 ◽  
Author(s):  
George Bakale ◽  
Ulrich Sowada ◽  
Werner F. Schmidt
Keyword(s):  
Nitrous Oxide ◽  
Electric Field ◽  
Molecular Oxygen ◽  
Sulfur Hexafluoride ◽  
Electron Attachment ◽  
Liquid Argon

Numerical Simulation of Leakage Current on Conductive Insulator Surface

2019 ◽  
Vol 8 (4) ◽  
pp. 9487-9492
Keyword(s):  
Numerical Simulation ◽  
Electric Field ◽  
Leakage Current ◽  
Method Of Lines ◽  
Electron Attachment ◽  
Negative Ions ◽  
Conduction Current ◽  
Insulator Surface ◽  
Finite Difference Approximations ◽  
Positive 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.

Direct measurement of the characteristic three-body electron attachment time in the atmospheric air in direct current electric field

2013 ◽  
Vol 103 (3) ◽  
pp. 034106 ◽  
Author(s):  
A. V. Shutov ◽  
I. V. Smetanin ◽  
A. A. Ionin ◽  
A. O. Levchenko ◽  
L. V. Seleznev ◽  
...  
Keyword(s):  
Electric Field ◽  
Direct Measurement ◽  
Direct Current ◽  
Electron Attachment ◽  
Atmospheric Air ◽  
Direct Current Electric Field ◽  
Three Body ◽  
Current Electric Field

Nitrous Oxide: Electron Attachment and Possible Scenario for Its Reaction with ns Metal Atoms

2003 ◽  
pp. 1067-1097
Author(s):  
Oksana Tishchenko ◽  
Eugene S. Kryachko ◽  
Minh Tho Nguyen
Keyword(s):  
Nitrous Oxide ◽  
Electron Attachment ◽  
Metal Atoms

Dissociative electron attachment to CO2 produces molecular oxygen

2016 ◽  
Vol 8 (3) ◽  
pp. 258-263 ◽  
Author(s):  
Xu-Dong Wang ◽  
Xiao-Fei Gao ◽  
Chuan-Jin Xuan ◽  
Shan Xi Tian
Keyword(s):  
Molecular Oxygen ◽  
Electron Attachment ◽  
Dissociative Electron Attachment

The Concentration Dependence at 1 atm Pressure and 300 °K of the Binary Diffusion Coefficients of the Systems Helium – Carbon Dioxide, Helium – Nitrous Oxide, and Helium – Sulfur Hexafluoride

1972 ◽  
Vol 50 (12) ◽  
pp. 1874-1876 ◽  
Author(s):  
Kenneth R. Harris ◽  
T. N. Bell ◽  
Peter J. Dunlop
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Diffusion Coefficient ◽  
Concentration Dependence ◽  
Mole Fraction ◽  
Diffusion Coefficients ◽  
Sulfur Hexafluoride ◽  
Enskog Theory ◽  
Binary Diffusion ◽  
Binary Diffusion Coefficients

Binary diffusion coefficients are reported for the systems He–CO2, He–N2O, and He–SF6. In agreement with the Chapman–Enskog theory the concentration dependence of the diffusion coefficient of each system increases with the mole fraction of the heavier component.

scholarly journals Evaluation of nitrous oxide as a substitute for sulfur hexafluoride to reduce global warming impacts of ANSI/HPS N13.1 gaseous uniformity testing

2018 ◽  
Vol 176 ◽  
pp. 40-46
Author(s):  
Xiao-Ying Yu ◽  
J. Matthew Barnett ◽  
Brett G. Amidan ◽  
Kurtis P. Recknagle ◽  
Julia E. Flaherty ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Global Warming ◽  
Sulfur Hexafluoride

Age of Air in the Stratosphere from Observations

2020 ◽  
Author(s):  
Marianna Linz ◽  
Benjamin Birner ◽  
Alan Plumb ◽  
Edwin Gerber ◽  
Florian Haenel ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Sulfur Hexafluoride ◽  
Trace Gases ◽  
Trace Gas ◽  
Calculation Methods ◽  
Stratospheric Circulation ◽  
Tracer Age ◽  
Compact Relationship

<p>Age of air is an idealized tracer often used as a measure of the stratospheric circulation. We will show how to quantitatively relate age to the diabatic circulation and the adiabatic mixing. As it is an idealized tracer, age cannot be measured itself and must be inferred from other tracers. Typically, the two primary trace gases used are sulfur hexafluoride and carbon dioxide. Other tracers have a compact relationship with age, however, and can also be used to calculate age. We will discuss a range of tracer measurements from both satellites and in situ, including sulfur hexafluoride, carbon dioxide, nitrous oxide, methane, and the ratio of argon to nitrogen. We will compare the age derived from these different species, including different calculation methods and caveats, and compare with modeled ideal age and trace gas concentrations. We conclude by showing the strength of the diabatic circulation and the adiabatic mixing calculated from these trace gas calculations.</p>

Radio emission from fast streamers

2020 ◽  
Author(s):  
Nikolai Lehtinen
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Electron Attachment ◽  
Computational Method ◽  
Radio Emissions ◽  
Streamer Propagation ◽  
Streamer Length ◽  
Calculation Results ◽  
External Conditions ◽  
Lightning Initiation

<p>A new computational approach, based on treating an electric streamer as a nonlinear instability, allows to determine unambiguously its parameters, for a given streamer length and external electric field, which may be nonuniform. Among the determined parameters are the speed, current and conductivity inside the streamer. These parameters may vary over orders of magnitude, depending on external conditions.</p><p>We use these parameters to calculate the radio emissions which would be observed on the ground from fast discharges produced in lightning, in which streamer velocities approach a significant fraction of the speed of light. Fast discharges play an important role in lightning initiation and may be responsible for production of Terrestrial Gamma Flashes (TGF). They manifest themselves in ground-based radio observations as Narrow Bipolar Events (NBE), to which the calculation results are compared.</p><p>We will discuss conditions, the effect of which on streamer propagation (and therefore electromagnetic radiation) may be quantified with the used computational method. These include (i) the external electric field modification due to charges deposited by previous streamers; and (ii) electron attachment inside the streamer channel, which is strongly affected by cloud humidity.</p>

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