Experimental Study of a Fast Ionization Wave Discharge at High Pulse Repetition Rates

Udagawa, Keisuke; Gorbatov, S. V.; Pliavaka, F. V.; Nishihara, Munetake; Adamovich, Igor V.

doi:10.2514/6.2008-1104

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…In this case, the positive polarity terminal of the pulser (+16 kV) was connected to the 'high voltage electrode', and the negative polarity terminal (−16 kV) was connected to the 'grounded electrode' and the waveguide outside the cell (see figure 1(a)). This 'dual polarity' ionization wave generated by this pulser, similar to the one used in our previous work [10], was used to reduce significantly pulse voltage rise time and increase peak voltage difference between the electrodes. Note that the voltage between the electrodes may be higher than the difference between the incident pulse peak voltages (by up to a factor of two), due to incident voltage pulse reflection.…”

Section: Methodsmentioning

confidence: 99%

Surface charge dynamics and OH and H number density distributions in near-surface nanosecond pulse discharges at a liquid / vapor interface

Winters¹,

Petrishchev²,

Yin³

et al. 2015

J. Phys. D: Appl. Phys.

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The present work provides insight into surface charge dynamics and kinetics of radical species reactions in nanosecond pulse discharges sustained at a liquid-vapor interface, above a distilled water surface. The near-surface plasma is sustained using two different discharge configurations, a surface ionization wave discharge between two exposed metal electrodes and a double dielectric barrier discharge. At low discharge pulse repetition rates (~100 Hz), residual surface charge deposition after the discharge pulse is a minor effect. At high pulse repetition rates (~10 kHz), significant negative surface charge accumulation over multiple discharge pulses is detected, both during alternating polarity and negative polarity pulse trains. Laser induced fluorescence (LIF) and two-photon absorption LIF (TALIF) line imaging are used for in situ measurements of spatial distributions of absolute OH and H atom number densities in near-surface, repetitive nanosecond pulse discharge plasmas. Both in a surface ionization wave discharge and in a double dielectric barrier discharge, peak measured H atom number density, [H] is much higher compared to peak OH number density, due to more rapid OH decay in the afterglow between the discharge pulses. Higher OH number density was measured near the regions with higher plasma emission intensity. Both OH and especially H atoms diffuse out of the surface ionization wave plasma volume, up to several mm from the liquid surface. Kinetic modeling calculations using a quasi-zerodimensional H 2 O vapor / Ar plasma model are in qualitative agreement with the experimental data. The results demonstrate the experimental capability of in situ radical species number density distribution measurements in liquid-vapor interface plasmas, in a simple canonical geometry that lends itself to the validation of kinetic models.

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Section: Methodsmentioning

confidence: 99%

Surface charge dynamics and OH and H number density distributions in near-surface nanosecond pulse discharges at a liquid / vapor interface

Winters¹,

Petrishchev²,

Yin³

et al. 2015

J. Phys. D: Appl. Phys.

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show abstract

“…Recent advances in nanosecond pulse discharge plasma [15][16][17][18][19] and direct driving of short pulse width [20,21] are expected to permit uniform discharge in supersonic air flow. This paper established an experimental system for nanosecond pulse discharge under supersonic conditions, and investigated discharge and displacement current characteristics under static condition and air flow velocity at Mach 2.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on nanosecond pulsed pin-to-plate discharge in supersonic air flow

Li¹,

Zhuang²,

Pang³

et al. 2019

Plasma Sci. Technol.

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Development of magnetohydrodynamic acceleration technology is expected to improve wind tunnel simulation capability and testing capability. The underlying premise is to produce uniform and stable plasma in supersonic air flow, and gas discharge is an effective way to achieve this. A nanosecond pulsed discharge experimental system under supersonic conditions was established, and a pin-to-plate nanosecond pulsed discharge experiment in Mach 2 air flow was performed to verify that the proposed method produced uniform and stable plasma under supersonic conditions. The results show that the discharge under supersonic conditions was stable overall, but uniformity was not as good as that under static conditions. Increasing the number of pins improved discharge uniformity, but reduced discharge intensity and hence plasma density. Under multi-pin conditions at 1000 Hz, the discharge was almost completely corona discharge, with the main current component being the displacement current, which was smaller than that under static conditions.

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Anode initiated impulse breakdown in water: the dependence on pulse rise time for nanosecond and sub-nanosecond pulses and initiation mechanism based on electrostriction

Seepersad¹,

Fridman²,

Dobrynin³

2015

J. Phys. D: Appl. Phys.

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The effect of the voltage rise time on nanosecond and sub-nanosecond impulse breakdown of distilled water is studied. The dependence of anode initiated streamer inception on this parameter is shown to be more intricate than previously reported, particularly as it relates to mechanisms directly in the liquid phase. Dynamics of the emission phase for sub-nanosecond pulses with 600ps rise time are presented to enable comparison with previous work on nanosecond initiation features.Schlieren imaging is also used to show the development of optical density perturbations and rarefactions as a result of electrostriction in the liquid which were previously found for nanosecond pulses as well. The mechanism of nanopore generation in the liquid due to fast impulses proposed by Shneider, Pekker and Fridman is used to explain the results.

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Experimental Study of a Fast Ionization Wave Discharge at High Pulse Repetition Rates

Cited by 7 publications

References 16 publications

Surface charge dynamics and OH and H number density distributions in near-surface nanosecond pulse discharges at a liquid / vapor interface

Surface charge dynamics and OH and H number density distributions in near-surface nanosecond pulse discharges at a liquid / vapor interface

Experimental study on nanosecond pulsed pin-to-plate discharge in supersonic air flow

Anode initiated impulse breakdown in water: the dependence on pulse rise time for nanosecond and sub-nanosecond pulses and initiation mechanism based on electrostriction

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