Electric field measurements in a nanosecond pulse discharge in atmospheric air

Simeni, Marien Simeni; Goldberg, Benjamin M.; Zhang, Cheng; Frederickson, Kraig; Lempert, Walter R.; Adamovich, Igor V.

doi:10.1088/1361-6463/aa6668

Cited by 44 publications

(58 citation statements)

References 27 publications

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“…For the same polarity data sets where this difference is detected, it indicates that the electric field between the pulses is affected by the partial neutralization of the surface charge by the opposite polarity charge transport from the plasma. This effect, on a microsecond time scale, has been detected in a ns pulse surface discharge and discussed in detail in our previous work [22]. Electric field behavior in the negative polarity pulse is completely different, indicating a well-pronounced forward breakdown in a diffuse ionization wave (see figure 5), with peak field of E≈32 kV cm −1 , but no sign of reverse breakdown that can be observed in the filamentary plasma in figure 5 (see figure 14(b)).…”

Section: Resultssupporting

confidence: 52%

Electric field distribution in a surface plasma flow actuator powered by ns discharge pulse trains

Simeni

Tang

Frederickson

et al. 2018

Plasma Sources Sci. Technol.

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Electric field vector components in a nanosecond pulse, surface dialectric barrier discharge plasma actuator are measured by picosecond second harmonic generation, for positive, negative, and alternating polarity pulse trains. Plasma images show that in the same polarity train, the positive polarity discharge develops as two consecutive surface ionization waves, while the negative polarity discharge propagates as a single diffuse ionization wave. In the alternating polarity train, both positive and negative polarity discharge plasmas become strongly filamentary. In all pulse trains, the measurement results demonstrate a significant electric field offset before the discharge pulse, due to the surface charge accumulation during previous discharges pulses. This demonstrates that charge accumulation is a significant factor affecting the electric field in the discharge, even at very low pulse repetition rates. Peak electric field measured in the alternating polarity pulse train is lower compared to that in same polarity trains. However, the coupled pulse energy in the alternating polarity train is much higher, by a factor of 3-4, most likely due to the neutralization of the surface charge accumulated on the dielectric during the previous, opposite polarity pulses. This suggests that plasma surface actuators powered by alternating polarity pulse trains may generate higher amplitude thermal perturbations, producing a stronger effect on the flow field. The present results show that the time scale for the electric field reduction in the plasma after breakdown is fairly long, several tens of ns, including the conditions when the discharge develops as a diffuse ionization wave. This suggests that a considerable fraction of the energy is coupled to the plasma at a relatively low reduced electric field, several tens of Townsend. At these conditions, the discharge energy fraction thermalized as rapid heating would remain fairly low, thus limiting the effect on the flow caused by the highamplitude localized thermal perturbations.

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Section: Resultssupporting

confidence: 52%

Electric field distribution in a surface plasma flow actuator powered by ns discharge pulse trains

Simeni

Tang

Frederickson

et al. 2018

Plasma Sources Sci. Technol.

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“…The development of 3D Monte Carlo/particle-in-cell (MC/PIC) kinetic models using an adaptive mesh and transient non-isotropic treatment of plasma electrons [43] is required for high-fidelity modeling predictions. Considerable progress has been made in electric field measurements in high-pressure transient discharges, using ns and ps four-wave mixing, as shown in figure 8 [44,45]. This method has significant potential for the time-resolved measurement of electric field distributions in transient plasmas, especially if ultra-short pulse lasers are used.…”

Section: Particle Transport In Non-equilibrium Plasmasmentioning

confidence: 99%

The 2017 Plasma Roadmap: Low temperature plasma science and technology

Adamovich

Baalrud

Bogaerts

et al. 2017

J. Phys. D: Appl. Phys.

780

549

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“…The pump and CARS beam intensities are measured by standard silicon PIN photodiodes, and the four-wave mixing beam intensity, proportional to the squared electric field integrated along the length of the discharge electrodes, is measured by a liquid nitrogen cooled InSb detector with matching preamplifier. Our previous measurements [4] show that at the present conditions, the four-wave mixing signal generated along a distance of approximately 6 cm is distributed nearly uniformly, due to a large signal coherence length, L IR = 14 cm.…”

mentioning

confidence: 48%

“…Both methods have certain limitations on spatial resolution. In collinear geometry four-wave mixing, spatial resolution along the laser beam, controlled by the Rayleigh range of the beam and by the coherence length, is up to several cm [4]. In emission spectroscopy, the extent of the plasma region over which the emission signal is integrated may have significant uncertainty, and plasma parameters may vary significantly both over the signal collection region and over time (e.g.…”

mentioning

confidence: 99%

Sub-nanosecond resolution electric field measurements during ns pulse breakdown in ambient air

Simeni¹,

Goldberg²,

Gulko³

et al. 2017

J. Phys. D: Appl. Phys.

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Electric field during ns pulse discharge breakdown in ambient air has been measured by ps four-wave mixing, with temporal resolution of 0.2 ns. The measurements have been performed in a diffuse plasma generated in a dielectric barrier discharge, in plane-to-plane geometry. Absolute calibration of the electric field in the plasma is provided by the Laplacian field measured before breakdown. Sub-nanosecond time resolution is obtained by using a 150 ps duration laser pulse, as well as by monitoring the timing of individual laser shots relative to the voltage pulse, and post-processing four-wave mixing signal waveforms saved for each laser shot, placing them in the appropriate 'time bins'. The experimental data are compared with the analytic solution for time-resolved electric field in the plasma during pulse breakdown, showing good agreement on ns time scale. Qualitative interpretation of the data illustrates the effects of charge separation, charge accumulation/neutralization on the dielectric surfaces, electron attachment, and secondary breakdown. Comparison of the present data with more advanced kinetic modeling is expected to provide additional quantitative insight into air plasma kinetics on ~ 0.1-100 ns scales.

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Electric field measurements in a nanosecond pulse discharge in atmospheric air

Cited by 44 publications

References 27 publications

Electric field distribution in a surface plasma flow actuator powered by ns discharge pulse trains

Electric field distribution in a surface plasma flow actuator powered by ns discharge pulse trains

The 2017 Plasma Roadmap: Low temperature plasma science and technology

Sub-nanosecond resolution electric field measurements during ns pulse breakdown in ambient air

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