Wall Recombination in Glow Discharges

Behnke, J. F.; Bindemann, T.; Deutsch, Hans‐Peter; Becker, K.

doi:10.1002/ctpp.2150370406

Cited by 25 publications

(28 citation statements)

References 40 publications

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“…Therefore one is free to choose between the different presentations. Inside the burning dc discharge a negative surface charge [5,9,50] is deposited on the tube walls. In a steady-state regime the electron and ion fluxes on the walls are equal.…”

Section: Resultsmentioning

confidence: 99%

Low-pressure gas breakdown in uniform dc electric field

Lisovskiy¹,

Yakovin²,

Yegorenkov³

2000

J. Phys. D: Appl. Phys.

147

120

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Abstract. This paper studies in experiment and theory the breakdown of argon, nitrogen, air and oxygen in a uniform dc electric field at different discharge gaps L, discharge tube radii R and cathode materials. At arbitrary geometric dimensions of the cylindrical discharge vessel and cathode materials the ratio of the breakdown electric field value to the gas pressure p at the minimum of the breakdown curves is shown to remain constant, (E dc /p) min ≈ constant. A modified breakdown law for the low-pressure dc dischargeThat is, the breakdown voltage U dc is shown to depend not only on the product pL, but also on the ratio L/R. A method is presented enabling one to predict a dc breakdown curve in the cylindrical discharge vessel possessing arbitrary L and R values from the measured data on the dc breakdown.

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Section: Resultsmentioning

confidence: 99%

Low-pressure gas breakdown in uniform dc electric field

Lisovskiy¹,

Yakovin²,

Yegorenkov³

2000

J. Phys. D: Appl. Phys.

147

120

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“…Consequently the near-wall electric field E rw is determined by the excess negative surface charge coming to the tube wall. Let us write the field E rw in the form [38] E rw ¼ e$Ds e 3 0 ;…”

Section: à3mentioning

confidence: 99%

Radial structure of low pressure rf capacitive discharges

Lisovskiy

Kharchenko

Yegorenkov

2010

Vacuum

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a b s t r a c tThis paper studies the glow intensity distribution of the discharge plasma against the tube radius and reports the radial profiles of electron temperature and plasma concentration in the rf capacitive discharge registered with a Langmuir probe. An abrupt increase of electron temperature and glow intensity near the tube wall in the weak-current a-mode of the rf capacitive discharge is revealed, the radial distribution of plasma concentration and ion flow to the electrodes possessing a maximum near the radial sheath boundary. In the g-mode of the rf capacitive discharge the electron temperature decrease in the total plasma volume leads to an electric field weakening and the peak of the glow intensity near the tube wall vanishes. The radial sheath thickness in the a-mode of the rf capacitive discharge obtained with 2D simulation experiences pulsations during the rf field period, the changing radial electric field heating electrons and increasing the plasma concentration near the boundary of the radial sheath.

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“…No attempt was however made to put this appealing idea onto a formal basis. Later the notion of a two-dimensional surface charge was developed further by Behnke and coworkers [17][18][19] utilizing phenomenological rate equations for the electron and ion surface densities. In these equations, the microphysics at the wall is encapsulated in surface parameters, such as, electron and ion sticking coefficients, electron and ion desorption times, and an electron-ion wall recombination coefficient.…”

Section: Introductionmentioning

confidence: 99%

Electron surface layer at the interface of a plasma and a dielectric wall

2012

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We study the plasma-induced modifications of the potential and charge distribution across the interface of a plasma and a dielectric wall. For this purpose, the wall-bound surplus charge arising from the plasma is modelled as a quasi-stationary electron surface layer in thermal equilibrium with the wall. It satisfies Poisson's equation and minimizes the grand canonical potential of wallthermalized excess electrons. Based on an effective model for a graded interface taking into account the image potential and the offset of the conduction band to the potential just outside the dielectric, we specifically calculate the modification of the potential and the distribution of the surplus electrons for MgO, SiO2 and Al2O3 surfaces in contact with a helium discharge. Depending on the electron affinity of the surface, we find two vastly different behaviors. For negative electron affinity, electrons do not penetrate into the wall and a quasi-two-dimensional electron gas is formed in the image potential, while for positive electron affinity, electrons penetrate into the wall and a negative space charge layer develops in the interior of the dielectric. We also investigate how the non-neutral electron surface layer -which can be understood as the ultimate boundary of a bounded gas discharge -merges with the neutral bulk of the dielectric.

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Wall Recombination in Glow Discharges

Cited by 25 publications

References 40 publications

Low-pressure gas breakdown in uniform dc electric field

Low-pressure gas breakdown in uniform dc electric field

Radial structure of low pressure rf capacitive discharges

Electron surface layer at the interface of a plasma and a dielectric wall

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