Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Striations in moderate pressure dc driven nitrogen glow discharge

Journal Article · · Journal of Physics. D, Applied Physics
 [1];  [2];  [3];  [4]
  1. University of South Carolina, Columbia, SC (United States); OSTI
  2. Texas Tech University, Lubbock, TX (United States)
  3. University of Alabama, Huntsville, AL (United States)
  4. University of South Carolina, Columbia, SC (United States)
Plasma stratification has been studied for more than a century. Despite the many experimental studies reported on this topic, theoretical analyses and numerical modeling of this phenomenon have been mostly limited to rare gases. In this work, a one-dimensional fluid model with detailed kinetics of electrons and vibrationally excited molecules is employed to simulate moderate-pressure (i.e. a few Torrs) dc discharge in nitrogen in a 15.5 cm long tube of radius 0.55 cm. The model also considers ambipolar diffusion to account for the radial loss of ions and electrons to the wall. The proposed model predicts self-excited standing striations in nitrogen for a range of discharge currents. The impact of electron transport parameters and reaction rates obtained from a solution of local two-term and a multi-term Boltzmann equation on the predictions are assessed. In-depth kinetic analysis indicates that the striations result from the undulations in electron temperature caused due to the interaction between ionization and vibrational reactions. Furthermore, the vibrationally excited molecules associated with the lower energy levels are found to influence nitrogen plasma stratification and the striation pattern strongly. A balance between ionization processes and electron energy transport allows the formation of the observed standing striations. Simulations were conducted for a range of discharge current densities from ~0.018 to 0.080 mA cm–2, for an operating pressure of 0.7 Torr. Parametric studies show that the striation length decreases with increasing discharge current. Furthermore, the predictions from the model are compared against experimental measurements and are found to agree favorably.
Research Organization:
University of Alabama, Huntsville, AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0021391
OSTI ID:
1979264
Journal Information:
Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 8 Vol. 55; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (49)

Electron thermal diffusion instability and standing striations in the plasma of a dc discharge in molecular gases journal November 1980
VV and VT rate coefficients in N2 by a quantum-classical model journal November 1979
Non-equilibrium dissociation and ionization of nitrogen in electrical discharges: The role of electronic collisions from vibrationally excited molecules journal April 1982
Review of glow discharge instabilities journal March 1976
Monte Carlo simulation of electron drift and diffusion in counting gases under the influence of electric and magnetic fields journal January 1999
Determination of nitrogen V–V transfer rates by stimulated Raman pumping journal March 2004
Shock‐Tube Study of Nitrogen Dissociation using Vacuum‐Ultraviolet Light Absorption journal January 1968
The mechanism of striation formation in plasma display panels journal August 2005
Energy balance in a nonequilibrium weakly ionized nitrogen discharge journal August 1986
Numerical investigation of the kinetics and chemistry of rf glow discharge plasmas sustained in He, N2, O2, He/N2/O2, He/CF4/O2, and SiH4/NH3using a Monte Carlo‐fluid hybrid model journal February 1992
Dissociative recombination and excitation of N2+: Cross sections and product branching ratios journal February 1998
On electron bunching and stratification of glow discharges journal October 2013
Discharge stratification in noble gases as convergence of electron phase trajectories to attractors journal December 2016
Magnetized direct current microdischarge I. Effect of the gas pressure journal March 2017
Advances in simulations of moving striations in DC discharges of noble gases journal October 2019
Stationary striations in an argon plasma as a bifurcation phenomenon journal January 1979
Electron kinetics in standing and moving striations in argon gas journal January 2021
Ionization Waves (Striations) in a Discharge Plasma journal February 1968
On the non-local electron kinetics in spatially periodic striation-like fields journal January 1999
Is the classical two-term approximation of electron kinetic theory satisfactory for swarms and plasmas? journal November 2003
Striations in rare gas plasmas journal December 2006
Atmospheric pressure methane–hydrogen dc micro-glow discharge for thin film deposition journal August 2008
Plasma chemistry model of surface microdischarge in humid air and dynamics of reactive neutral species journal October 2012
Kinetic modelling for an atmospheric pressure argon plasma jet in humid air journal June 2013
High-order fluid model for streamer discharges: I. Derivation of model and transport data journal October 2013
High-order fluid model for streamer discharges: II. Numerical solution and investigation of planar fronts journal October 2013
Ion kinetics and self pulsing in DC microplasma discharges at atmospheric and higher pressure journal March 2016
Validating the Goldstein–Wehner law for the stratified positive column of dc discharge in an undergraduate laboratory journal September 2012
Solving the Boltzmann equation to obtain electron transport coefficients and rate coefficients for fluid models journal October 2005
Simulation of dc atmospheric pressure argon micro glow-discharge journal August 2006
Electron kinetics in non-uniform glow discharge plasmas journal May 1995
Ionization instability induced striations in atmospheric pressure He/H 2 O RF and DC discharges journal March 2017
A multi-term Boltzmann equation benchmark of electron-argon cross-sections for use in low temperature plasma models journal March 2018
Plasma stratification in radio-frequency discharges in argon gas journal April 2020
Foundations of DC plasma sources journal November 2017
Longitudinal structure and plasma parameters of an entire DC glow discharge as obtained using a 1D fluid-based model with non-local ionization journal July 2020
The IST-LISBON database on LXCat journal December 2014
Influence of negative-ion processes on steady-state properties and striations in molecular gas discharges journal September 1974
Extended Boltzmann analysis of electron swarm experiments journal January 1981
Comparative calculations of electron-swarm properties in N 2 at moderate E N values journal January 1982
Plasma Stability of Electric Discharges in Molecular Gases journal August 1973
Kinetic resonances and stratification of the positive column of a discharge journal August 2005
Experimental Observation and Computational Analysis of Striations in Electronegative Capacitively Coupled Radio-Frequency Plasmas journal June 2016
Pattern Formation in Low-Pressure Radio-Frequency Plasmas due to a Transport Instability journal December 2019
2-D simulations of striations in direct current glow discharges in argon journal April 2005
Striations in a Low-Pressure RF-Driven Argon Plasma journal August 2008
Computational Studies of Atmospheric-Pressure Methane–Hydrogen DC Micro Glow Discharges journal February 2010
Striations in High-Pressure Hydrogen Microplasma journal October 2014
Advances in the study of striations in inert gases journal December 2014

Similar Records

A self-consistent hybrid model of kinetic striations in low-current argon discharges
Journal Article · Mon Feb 28 23:00:00 EST 2022 · Plasma Sources Science and Technology · OSTI ID:1979313

Ionization waves in low-current dc discharges in noble gases obtained with a hybrid kinetic-fluid model
Journal Article · Tue Dec 20 19:00:00 EST 2022 · Physical Review. E · OSTI ID:1915453

The successive production of striations in a glow discharge in hydrogen
Journal Article · Fri Oct 31 23:00:00 EST 1958 · Czechoslovak Journal of Physics · OSTI ID:4207161