Determination of electron properties of a helium atmospheric pressure plasma jet with a grounded metallic target

Tran, Tuyen; Oh, Cheol; Lee, Wonwook

doi:10.1002/ppap.202100092

Cited by 7 publications

(3 citation statements)

References 59 publications

(82 reference statements)

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“…It then increases linearly in the plume up to ∼20 kV cm −1 without target influence, proportionally to the air molar fraction [38,43,[45][46][47][48][49]96], as also highlighted in the recent review by Babaeva and Naidis (2021) [143]. This increase has been confirmed by several He jet simulation works [48,96,147,148,238,308], and by the measurement of T e using the emissivity of continuum radiation via Bremsstrahlung by Tran et al (2021) [101]. One comparison between measurements and simulations of peak electric field in the tube and in the plume in the same jet configuration is shown in figure 21, confirming this feature.…”

Section: Peak Electric Field In the Discharge Front During Propagationsupporting

confidence: 66%

“…This has been measured by Klarenaar et al (2018) [94] for positive polarity of applied voltage with highpermittivity dielectric (deionized water) and copper targets at floating potential and simulated with grounded metallic targets and both polarities [289,295]. An increase of n e with grounded conductive target with respect to free jet has also been measured by Tran et al (2021) [101]. Additionally, an increase in He metastable density has been observed both in measurements [76] and simulations [295], with a grounded metallic target and both polarities.…”

Section: Discharge Parameters During Plasma-target Interactionmentioning

confidence: 88%

“…Both the calculations of electron density from the electric field profile in Sretenović et al (2017) [44] and Thomson scattering measurements [91,94,96] give a rising trend of the electron density as the distance from the exit of the capillary increases. The only exception is the decaying trend of electron density measured in [101] with the broadband emission of neutral bremsstrahlung, which could be influenced by the volume of plasma actually emitting this radiation.…”

Section: Electron Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Physics of plasma jets and interaction with surfaces: review on modelling and experiments

Viegas

Slikboer

Bonaventura

et al. 2022

Plasma Sources Sci. Technol.

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Plasma jets are sources of repetitive and stable ionization waves, meant for applications where they interact with surfaces of different characteristics. As such, plasma jets provide an ideal testbed for the study of transient reproducible streamer discharge dynamics, particularly in inhomogeneous gaseous mixtures, and of plasma-surface interactions. This topical review addresses the physics of plasma jets and their interactions with surfaces through a pedagogical approach. The state-of-the-art of numerical models and diagnostic techniques to describe helium jets is presented, along with the benchmarking of different experimental measurements in literature and recent efforts for direct comparisons between simulations and measurements. This exposure is focused on the most fundamental physical quantities determining discharge dynamics, such as the electric field, the mean electron energy and the electron number density, as well as the charging of targets. The physics of plasma jets is described for jet systems of increasing complexity, showing the effect of the different components (tube, electrodes, gas mixing in the plume, target) of the jet system on discharge dynamics. Focusing on coaxial helium kHz plasma jets powered by rectangular pulses of applied voltage, physical phenomena imposed by different targets on the discharge, such as discharge acceleration, surface spreading, the return stroke and the charge relaxation event, are explained and reviewed. Finally, open questions and perspectives for the physics of plasma jets and interactions with surfaces are outlined.

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Section: Peak Electric Field In the Discharge Front During Propagationsupporting

confidence: 66%

Section: Discharge Parameters During Plasma-target Interactionmentioning

confidence: 88%

Section: Electron Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Physics of plasma jets and interaction with surfaces: review on modelling and experiments

Viegas

Slikboer

Bonaventura

et al. 2022

Plasma Sources Sci. Technol.

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Role of helium metastable state in the interaction between He atmospheric pressure plasma jet and ns pulsed laser

Lee

Tran

2023

Spectrochimica Acta Part B: Atomic Spectroscopy

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Plasma parameters and electric field fluctuations in a cold micro-plasma jet interacting with a substrate

Behmani,

Bhattacharjee

2023

Physics of Plasmas

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Interaction of a cold atmospheric pressure micro-plasma jet with different types of substrates having a range of electrical permittivity (εr), such as conductor (copper), semiconductor (p-type silicon), insulator (Teflon and quartz), and biological (goat skin), is carried out experimentally. The electric field fluctuations, cross-phase analysis, plasma parameters [electron excitation temperature (Texc) and electron density (ne)], average propagation velocity of the plasma bullet, gas temperature (Tg), power dissipated on the substrates, and substrate temperature are investigated during the interaction. Cross phase analysis and plasma bullet velocity support the return stroke phenomenon for high εr samples, such as copper and silicon, and a surface ionization wave is generated in the case of low εr samples, such as Teflon, quartz, and biological tissue. The highest substrate current (IS) is observed for copper due to its high conductivity. Tg and ne are affected by the interaction; however, Texc is observed to change only slightly. ne is comparatively higher for high εr samples, and for all samples, it increases initially and, thereafter, decreases as we get closer to the sample's surface. Tg is comparatively higher for low εr samples and increases axially downward from the orifice of the jet, it is lower and almost constant for copper and silicon. The electric field fluctuation (EZ and Eϕ components) frequencies lie up to ∼8 kHz with a peak amplitude at ∼1 kHz, which is found to be comparatively higher for low εr samples.

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Determination of electron properties of a helium atmospheric pressure plasma jet with a grounded metallic target

Cited by 7 publications

References 59 publications

Physics of plasma jets and interaction with surfaces: review on modelling and experiments

Physics of plasma jets and interaction with surfaces: review on modelling and experiments

Role of helium metastable state in the interaction between He atmospheric pressure plasma jet and ns pulsed laser

Plasma parameters and electric field fluctuations in a cold micro-plasma jet interacting with a substrate

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