Ferroelectric cathodes in transverse magnetic fields

Dunaevsky, A.; Raitses, Yevgeny; Fisch, Nathaniel J.

doi:10.1063/1.1556568

Cited by 4 publications

(4 citation statements)

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“…Unfortunately, only a few studies have been conducted to understand the effect of ferroelectric materials on plasma properties and dynamics. For example, electrical properties, including voltages and currents 23 and discharge patterns of both gas 24 and surface 25 , 26 were preliminarily characterized in FBD plasmas. Other studies mainly focused on practically applying ferroelectric materials to improve plasma manufacturing yield (e.g., ammonia synthesis 27 , 28 , NO x removal 29 , and carbon dioxide conversion 30 ).…”

Section: Introductionmentioning

confidence: 99%

Enhancements of electric field and afterglow of non-equilibrium plasma by Pb(ZrxTi1−x)O3 ferroelectric electrode

Xu,

Liu,

Lin

et al. 2024

Nat Commun

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Manipulating surface charge, electric field, and plasma afterglow in a non-equilibrium plasma is critical to control plasma-surface interaction for plasma catalysis and manufacturing. Here, we show enhancements of surface charge, electric field during breakdown, and afterglow by ferroelectric barrier discharge. The results show that the ferroelectrics manifest spontaneous electric polarization to increase the surface charge by two orders of magnitude compared to discharge with an alumina barrier. Time-resolved in-situ electric field measurements reveal that the fast polarization of ferroelectrics enhances the electric field during the breakdown in streamer discharge and doubles the electric field compared to the dielectric barrier discharge. Moreover, due to the existence of surface charge, the ferroelectric electrode extends the afterglow time and makes discharge sustained longer when alternating the external electric field polarity. The present results show that ferroelectric barrier discharge offers a promising technique to tune plasma properties for efficient plasma catalysis and electrified manufacturing.

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Section: Introductionmentioning

confidence: 99%

Enhancements of electric field and afterglow of non-equilibrium plasma by Pb(ZrxTi1−x)O3 ferroelectric electrode

Xu,

Liu,

Lin

et al. 2024

Nat Commun

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“…1, is similar to other setups for study of FPS. [1][2][3][4][5][6][7][8][9][10] The ferroelectric plasma source consists of a ferroelectric disc Operation of the FPS with probes was observed by Andor I-Star ® ICCD camera.…”

Section: Methodsmentioning

confidence: 99%

“…Because of these reasons, most of the probe measurements in previous studies of FPS were done by biased probes placed behind a grounded grid, which helped to suppress the noise. [6][7][8][9] Measurements of the density of expanding plasma behind the grounded grid left some uncertainty in the original plasma density because of grid transparency, which is not easy to evaluate accurately. Consequently, reliable temporal profiles of the plasma density in the expanding FPS plasma were not obtained yet.…”

Section: Introductionmentioning

confidence: 99%

“…5 In the majority of experiments, plasma measurements were performed in expanding plasma by probes placed distantly from the FPS surface. 6,7,8,9 Although placed distantly, the probes are exposed to strong broadband electromagnetic noise from the surface discharge. Consequently, measurements of the ion saturation branch of the ampere-volt characteristics of a biased probe, where the probe signal is usually very low, become uncertain on the noise background of hundreds of millivolts.…”

Section: Introductionmentioning

confidence: 99%

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Measuring the plasma density of a ferroelectric plasma source in an expanding plasma

Dunaevsky

Fisch

2004

Journal of Applied Physics

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The initial density and electron temperature at the surface of a ferroelectric plasma source were deduced from floating probe measurements in an expanding plasma. The method exploits negative charging of the floating probe capacitance by fast flows before the expanding plasma reaches the probe. The temporal profiles of the plasma density can be obtained from the voltage traces of the discharge of the charged probe capacitance by the ion current from the expanding plasma. The temporal profiles of the plasma density, at two different distances from the surface of the ferroelectric plasma source, could be further fitted by using the density profiles for the expanding plasma. This gives the initial values of the plasma density and electron temperature at the surface. The method could be useful for any pulsed discharge, which is accompanied by considerable electromagnetic noise, if the initial plasma parameters might be deduced from measurements in expanding plasma.

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