Power balance and space-charge confinement in a neon dc column plasma

Uhrlandt, Dirk

doi:10.1088/0022-3727/35/17/312

Cited by 17 publications

(16 citation statements)

References 20 publications

(52 reference statements)

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“…To derive the global power balance equation the spatially resolved power balance of heavy particles has to be considered together with the electron power balance. 22 Finally, the global power balance equation becomes the form…”

Section: B Global Power Balance Of the Discharge Plasmamentioning

confidence: 99%

Experimental and theoretical investigations of a low-pressure He–Xe discharge for lighting purpose

Bussiahn

Gortchakov

Lange

et al. 2004

Journal of Applied Physics

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Low-pressure cylindrical dc glow discharges in a mixture of helium and 2% xenon are studied by experiment and self-consistent modeling. They can be used for the design of mercury-free vacuum ultraviolet sources and fluorescent lamps for publicity lighting. Experimental diagnostics of the column plasma includes measurements of the axial electric field strength and of the axis densities of the four lowest excited states of xenon. The electric field is determined from probe measurements. The particle densities are derived from the results of tunable diode laser absorption spectroscopy. Experimental investigations are assisted by a self-consistent analysis of the dc positive column plasma. A comparison between calculated and measured values of the axial electric field strength and the densities of excited xenon atoms is presented and discussed. The validated model is used for optimization of the discharge conditions by variation of the discharge current, gas pressure, and tube radius with respect to the radiation power and efficiency of the 147 nm resonance line of xenon. The discussion includes an analysis of the power budget of the column plasma.

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Section: B Global Power Balance Of the Discharge Plasmamentioning

confidence: 99%

Experimental and theoretical investigations of a low-pressure He–Xe discharge for lighting purpose

Bussiahn

Gortchakov

Lange

et al. 2004

Journal of Applied Physics

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“…In general, this value is inversely proportional with the discharge tube radius. Therefore, at large radii, there is a net loss of electron near the axis leading to a decrease of the electron density and an increase in the electron temperature [20,21]. Hence, we have higher electron temperature at probe 3 than at probe 2.…”

Section: Resultsmentioning

confidence: 86%

Spatial variations of non-uniform argon glow discharge

2006

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The spatial variation of a non-uniform glow discharge due to the different diameters of the same discharge tube on the plasma parameters is attracting a considerable attention. For this reason the fundamental spatial plasma parameters of an argon glow discharge have been measured by using fast three couple of Langmuir double probe (TCDP) technique. The orbital motion limited (OML) theory has been used, since the probe radius is smaller than Debye length ξ < 1. The axial and radial variation of the electron temperature and density have been investigated. The results can be summarized as follow: due to the rise in the space-charge confinement with decreasing the tube radius and discharge current, the space-charge density increases, the electron temperature decreases.

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“…The observed discrepancy between experimental and numerical radial profiles of electron temperature indicates that the assumption of parabolic distribution of plasma potential may be incorrect for the case of the lowpressure low-frequency ICP with a ferrite core. It is necessary to underline that the assumption was made for DC glow discharges with a tube diameter of a few centimeters [3], while the low-frequency ICP discharge chamber diameter is 23 centimeters.…”

Section: Resultsmentioning

confidence: 99%

“…For simplicity, the radial distribution of plasma potential W(r) is taken as a parabolic function of radius, with a wall potential of 12 V, near the threshold for metastables excitation. This assumption is used to describe the radial distribution of plasma potential in DC glow discharges [3].…”

Section: Numerical Modelmentioning

confidence: 99%

Low-pressure low-frequency inductive discharge with ferrite cores for large-scale plasma processing

Isupov

Fedoseev

Sukhinin

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. Electrophysical characteristics of a low-frequency (100 kHz) low-pressure (10-100 Pa) argon inductive discharge with ferrite cores have been investigated for discharge currents of 1-50 A, discharge chamber diameter of 230 mm. The dependencies of electric field strength on the argon pressure and discharge current were measured. Radial profiles of electron density and temperature were determined with double electric probes. Experimental results were compared with numerical results obtained by a self-consistent kinetic model of the lowfrequency ICP, based on the simultaneous solution of a non-local Boltzmann equation for electron energy distribution function and balance equations for the metastable argon atoms density and gas temperature. Comparison of numerical and experimental results is presented.

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Power balance and space-charge confinement in a neon dc column plasma

Cited by 17 publications

References 20 publications

Experimental and theoretical investigations of a low-pressure He–Xe discharge for lighting purpose

Experimental and theoretical investigations of a low-pressure He–Xe discharge for lighting purpose

Spatial variations of non-uniform argon glow discharge

Low-pressure low-frequency inductive discharge with ferrite cores for large-scale plasma processing

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