Influence of the transverse dimension on the structure and properties of dc glow discharges

Bogdanov, E. A.; Adams, S. F.; Demidov, V. I.; Kudryavtsev, A. A.; Williamson, J. M.
October 2010
Physics of Plasmas;Oct2010, Vol. 17 Issue 10, p103502
Academic Journal
Two-dimensional (2D) simulations of a dc glow discharge with a cold cathode in argon have been performed for various radii of the discharge tube. It is shown that the loss of the charged particles to the walls can significantly affect plasma parameters as well as properties of the cathode sheath. The longitude dimensions of the negative glow and Faraday dark space depend on the transverse loss of the charge particles and are not consistently predicted with a 1D model. The common assumption that the cathode sheath can be analyzed independently of the plasma also may not be valid. The transverse inhomogeneity of the plasma leads to a change in the current density distribution over the cathode surface. The thickness of the cathode sheath can vary with radial distance from the discharge axis, even for the case of negligible radial loss of the charge particles. The 2D model results provide an analysis of the conditions of applicability of the 1D model.


Related Articles

  • Cold-cathode source of ribbon gaseous ion beams. Emlin, D. R.; Gavrilov, N. V. // Review of Scientific Instruments;May2004, Vol. 75 Issue 5, p1872 

    A ribbon ion beam source based on a magnetically confined low-pressure glow discharge has been developed. The electrode system of the ion source consists of four series-installed discharge chambers of the inverted magnetron type with a thin-wire anode. Slots are made in walls between the...

  • Heavy-particle hybrid modeling of transients in a direct-current argon discharge. Donko[a], Z. // Journal of Applied Physics;9/1/2000, Vol. 88 Issue 5, p2226 

    Describes the transient behavior of a low-pressure, cold-cathode, direct-current-excited argon discharge, by developing a hybrid model incorporating heavy-particle processes. Initiation of the transients by applying a high-voltage pulse to the discharge; Calculation of the transient electrical...

  • Charged species dynamics in an inductively coupled Ar/SF[sub 6] plasma discharge. Rauf, Shahid; Ventzek, Peter L. G.; Abraham, Ion C.; Hebner, Gregory A.; Woodworth, Joseph R. // Journal of Applied Physics;12/15/2002, Vol. 92 Issue 12, p6998 

    The chemistry of high-density SF[sub 6] plasma discharges is not well characterized. In this article, a combination of computational modeling and experimental diagnostics has been utilized to understand charged species dynamics in an inductively coupled Ar/SF[sub 6] plasma discharge. The model...

  • Application of a dc glow discharge source with controlled plasma potential in plasma immersion... Ueda, M.; Berni, L. A. // Journal of Applied Physics;11/1/1999, Vol. 86 Issue 9, p4821 

    Presents information on a study which developed a direct current glow discharge source with controlled plasma potential for application in plasma immersion ion implantation (PIII) processing of materials surfaces. Description of the glow discharge plasma source and PIII device; Measurements of...

  • Production of fullerenes in gas discharge plasmas. II. Dynamics of reactions between charged and neutral carbon clusters. Alekseev, N. I.; Dyuzhev, G. A. // Technical Physics;Dec99, Vol. 44 Issue 12, p1435 

    The formation of fullerene structures in the presence of an electric charge on the carbon clusters is studied. It is shown that the effect of plasma as a carbon source on the dynamics of the change in carbon clusters reduces exclusively to the formation of the initial conditions for efflux of a...

  • Arc erosion characteristics of pseudospark discharge in multiaperture geometry. Naweed, Ahmer; Kiefer, Jochen; Gavrilescu, Constantin; Neff, Willi // Journal of Applied Physics;8/15/2002, Vol. 92 Issue 4, p1788 

    Analysis of discharge mechanism in especially designed pseudosparks that facilitate pseudospark characteristic low-erosive conduction at very high currents is presented. The alternate formulation of criterion for transition to arc discharge phase developed here enables us to account for the...

  • Degradation of tin-doped indium-oxide film in hydrogen and argon plasma. Banerjee, Ratnabali; Ray, Swati; Basu, N.; Batabyal, A. K.; Barua, A. K. // Journal of Applied Physics;8/1/1987, Vol. 62 Issue 3, p912 

    Investigates the degradation of tin-doped indium-oxide (ITO) thin films in glow-discharge plasmas of hydrogen and argon. Application of ITO; Details on the experiment; Discussion on the results.

  • Electron transport coefficients in dusty argon plasmas. McCaughey, Michael J.; Kushner, Mark J. // Applied Physics Letters;9/4/1989, Vol. 55 Issue 10, p951 

    Low-temperature partially ionized plasmas, as used in plasma processing reactors and gas lasers, are often contaminated by gas phase particulates (1–10’s μm radius) resulting from electrode sputtering or gas phase chemical reactions. Particles having sizes comparable to or...

  • Comparative analysis of film formation in glow-discharge plasma in mixtures of methane with neon and argon. Soldatova, I. V.; Kotenev, V. A. // Protection of Metals & Physical Chemistry of Surfaces;Nov2009, Vol. 45 Issue 6, p656 

    Concentrations of Ne, Ar, and H atoms in metastable and resonance states, concentrations of atomic hydrogen, and the growth rates of polymer films were determined in the dc glow discharge in the Ne and Ar mixtures with (1–5) % CH4 in the pressure range of 13–520 Pa and discharge...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics