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Sigeneger, F.; Golubovskiǐ, Yu. B.; Porokhova, I. A.; Winkler, R.

doi:10.1023/a:1021694231064

Cited by 53 publications

(51 citation statements)

References 4 publications

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“…(5,8) Very large overall relaxation lengths were found, which are remarkably longer than the distance between probe and anode considered here so far. Therefore, the impact of the anode on the relaxation behaviour should be investigated.…”

Section: Resultsmentioning

confidence: 59%

“…The structures are most pronounced at lower pressures where the energy loss of electrons is mainly caused by their inelastic collisions. The period length of these structures have been found (4,8) to agree with single or double period lengths of ionization waves measured at the same spatially averaged electric field. This observation as well as the detailed analysis of the non-local behaviour of electrons in periodic fields (6,8) confirmed the resonance phenomenon.…”

Section: Introductionmentioning

confidence: 61%

“…Similar resonant paths have been studied when analysing the behaviour of electrons in spatially periodic fields typical of moving striations. (8) In contrast to these earlier investigations, now a superposition of inelastic collisions of electrons with ground state and excited atoms lead to a more complex behaviour. Because of the remarkable density of excited atoms, not only the excitation of ground state atoms but also the ionization of excited atoms generate resonant paths as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 94%

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Self-Consistent Analysis of the Spatial Relaxation of a Disturbed Neon Glow Discharge

Arndt

Sigeneger

Testrich

et al. 2005

Plasma Chem Plasma Process

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The response of a neon glow discharge plasma on a disturbance caused by a floating Langmuir probe is studied by a fully self-consistent, spatially one-dimensional hybrid method as well as by measurements. The theoretical description is based on the coupled solution of the hydrodynamic equations of electrons, ions, and excited atoms and the Poisson equation. The space-dependent transport and rate coefficients of the electron component are determined by a strict solution of the non-uniform electron kinetic equation. For the measurements, a probe was inserted in radial direction into the discharge several cm in front of the anode. The spatial evolution of the densities of the excited atoms in the 1s 3 , 1s 5 , and 2p 8 states was determined by spectroscopic methods. Pronounced modulations of basic plasma parameters have been observed around the probe, decaying periodically and damped toward the anode. The measured density profiles of the excited atoms agree well with the numerically determined ones. The analysis of the electron kinetic quantities shows that the response of the plasma to the disturbance is widely determined by the nonlocal behaviour of the electrons in the distinctly disturbed electrical field.

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Section: Resultsmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 94%

See 1 more Smart Citation

Self-Consistent Analysis of the Spatial Relaxation of a Disturbed Neon Glow Discharge

Arndt

Sigeneger

Testrich

et al. 2005

Plasma Chem Plasma Process

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“…To illustrate that the observed event is similar to the spatial electron relaxation, the spatial 046404-6 evolution of the electrons in the gap region of the microdischarge, acted upon by a modulated electric field typical of striations, has been investigated applying the kinetic approach given in [54]. Using the spatially periodic electric field [55] …”

Section: B Qualitative Analysis Of the Striated Microdischargementioning

confidence: 99%

Striated microdischarges in an asymmetric barrier discharge in argon at atmospheric pressure

et al. 2011

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The investigation of striated microdischarges in barrier discharges in argon at atmospheric pressure is reported. Microdischarges were investigated by means of electrical measurements correlated with intensified CCD camera imaging. The scaling law theory known from low-pressure glow discharge diagnostics was applied in order to describe and explain this phenomenon. The investigated microdischarge is characterized as a transient atmospheric-pressure glow discharge with a stratified column. It can be described by similarity parameters i/r≈0.13 A/cm, pr≈5 Torr cm, and 3<λ/r<5 with the current i, pressure p, interval of subsequent striations λ, and radius of the plasma channel r. An attempt to describe the mechanism of creation of a striated structure is given, based on an established model of the spatial electron relaxation.

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“…Relaxation processes of arbitrary initial EDFs injected into homogeneous and sinusoidally modulated, with a large degree of modulation, electric fields are illustrated in paper [2] on the basis of a numerical solution of the kinetic equation accounting for elastic collisions and excitation of several levels. The EDFs obtained in these fields demonstrate the bunching effect that is caused both by elastic collisions and by the presence of the several excited levels.…”

Section: Introductionmentioning

confidence: 99%

On the formation of the EDF in the inelastic energy region in the ionization waves

Kozakov¹,

Wilke²,

Golubovski

et al. 2004

Czech. J. Phys.

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Low pressure gas discharges in the inert gases frequently exist in striated mode. The occurrence of the striations at low pressures and small currents is a consequence of the resonant formation of the energy distribution function of electrons (EDF) in spatially periodic electric fields. At these conditions the energy relaxation length in elastic energy region is much bigger than the striation length and the relaxation length in the inelastic region is much smaller than that. This difference in the relaxation lengths in elastic and inelastic energy regions causes the different ways of the EDF formation in those regions. Before the excitation threshold the EDF is formed non-locally, what is connected with the big value of the energy relaxation length, while after the excitation threshold the small value of the relaxation length makes the EDF to form under the influence of the local value of the electric field with additional phase shift. It is shown in the presented paper, that in the limiting case of small values of relaxation length in the inelastic energy region the solution of the Boltzman equation can be obtained by sewing the non-local solution in the elastic energy region with the local solution in the inelastic region and also the appropriate phase shift can be determined. : 52.80.Tn, 52.25.Dg, 52.35.Lv PACS

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Cited by 53 publications

References 4 publications

Self-Consistent Analysis of the Spatial Relaxation of a Disturbed Neon Glow Discharge

Self-Consistent Analysis of the Spatial Relaxation of a Disturbed Neon Glow Discharge

Striated microdischarges in an asymmetric barrier discharge in argon at atmospheric pressure

On the formation of the EDF in the inelastic energy region in the ionization waves

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