Pulsed waveguided discharges

Grozev, D.; Kirov, K.; Shivarova, A.

doi:10.1051/jp4:1998726

Cited by 6 publications

(10 citation statements)

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“…The ionization front velocity V f is obtained by measuring the time delay between the light signals picked from two positions at a given distance ( z ≈ 1 cm [39,40]) along the discharge length and applied to two photomultipliers (Fig. 74).…”

Section: Resultsmentioning

confidence: 99%

“…The pulsation of the discharge end is the visible effect of this instability. Based on experiments [13,39,40,329] this instability has been identified as a modulation type of instability.…”

Section: Modulation-type Of Instabilities Of the Dischargesmentioning

confidence: 99%

“…The studies in the literature of pulsed regime operation of waveguide discharges are on discharge maintenance without external magnetic field, i.e. with SWs as carrier waves of the pulses [13,33,39,40,130,[158][159][160][161][162][163][164][165]325,326]. Possibilities for creating high density plasmas with intensive spectral line emission at low averaged power applied for the discharge production have been outlined as reasons motivating the early studies on pulsed SWSDs.…”

Section: Pulsed Discharges: Self-consistency Based On Combined Actionmentioning

confidence: 99%

“…The data accumulated in the experiments [13,39,40,[158][159][160][161][162][163][164]325] on the pulsed regime operation of the SWSDs are mainly for the ionization front velocity, the rise time of the pulse and the axial profiles of the plasma density. In more detailed experiments [39] showing the simultaneous self-consistent changes along the discharge length of the plasma-density pulses and the electric field-power, effects like a separation of a solitary-like wave from the leading edge of the pulse have also been observed.…”

Section: Pulsed Discharges: Self-consistency Based On Combined Actionmentioning

confidence: 99%

“…[39][40][41][42][43][44][45][46]) which motivate aspects of the reported modelling are also pointed out in the review.…”

Section: Introductionmentioning

confidence: 96%

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Travelling-wave-sustained discharges

Schlüter

Shivarova

2007

Physics Reports

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Section: Resultsmentioning

confidence: 99%

“…The pulsation of the discharge end is the visible effect of this instability. Based on experiments [13,39,40,329] this instability has been identified as a modulation type of instability.…”

Section: Modulation-type Of Instabilities Of the Dischargesmentioning

confidence: 99%

Section: Pulsed Discharges: Self-consistency Based On Combined Actionmentioning

confidence: 99%

Section: Pulsed Discharges: Self-consistency Based On Combined Actionmentioning

confidence: 99%

“…[39][40][41][42][43][44][45][46]) which motivate aspects of the reported modelling are also pointed out in the review.…”

Section: Introductionmentioning

confidence: 96%

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Travelling-wave-sustained discharges

Schlüter

Shivarova

2007

Physics Reports

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Surface-wave-produced plasmas in a diffusion-controlled regime

Makasheva

Shivarova

2001

Physics of Plasmas

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A numerical model of surface-wave-produced plasmas in a diffusion-controlled regime is presented in this study. With the wide gas-pressure range (p=0.05–5 Torr) considered in a combination with a frequency (f=144 MHz) in the rf-range, the model covers discharge maintenance under different conditions with respect to mechanisms of electron heating and discharge self-consistency. The precise description of the wave dispersion properties and field distribution in inhomogeneous collisional plasmas included in the electrodynamical part of the model and the specification of the discharge kinetics in its gas-discharge part provide the quantitative description of the discharge production. The model results in the self-consistent structure of the discharge composed by interrelated variations, along the discharge, of wave number, damping rate, field distribution, power absorbed in average by an electron, plasma density, electron temperature, and Joule heating. The total absorbed power finally obtained in its relation to the discharge length is the power which should be externally applied for the discharge maintenance.

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Nonstationarity of diffusion-controlled surface-wave-sustained discharges in a cw regime

2006

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The theory of the cw regime of maintenance of surface-wave-sustained gas discharges developed up to now is for discharge production at a given frequency. A generalization of this theory is presented here by considering discharge maintenance by a narrow-band signal, the actual situation in the experiments. Discharge production in a diffusion-controlled regime is treated within the fluid plasma theory. The set of the equations is for the interrelated variations along the discharge length of the time-dependent envelope of the electric field maintaining the plasma and for the time-dependent plasma characteristics (plasma density, electron temperature, power Θ absorbed on average by an electron). The numerical results presented for the time-space variations of wave-field amplitude and plasma density describe the nonstationary state of the cw regime of discharge maintenance. Detailed analysis with deterministic signals (Gaussian and super-Gaussian pulses) superimposed on a stationary cw-power level demonstrate different types of nonlinear effects—self-steepening and spontaneous modulation near the pulse edge—which are reminiscent of phenomena known from the nonlinear optics. The results for discharge maintenance by a high-frequency power modulated by a narrow-band low-amplitude Gaussian noise are discussed in terms of discharge stability/instability. Relevance to experimental finding in surface-wave-sustained discharge is commented on.

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Pulsed waveguided discharges

Cited by 6 publications

References 0 publications

Travelling-wave-sustained discharges

Travelling-wave-sustained discharges

Surface-wave-produced plasmas in a diffusion-controlled regime

Nonstationarity of diffusion-controlled surface-wave-sustained discharges in a cw regime

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