Influence of DC and AC external electric field on the propagation of “plasma bullets” along DBD helium plasma jet

Akishev, Yu. S.; Karalnik, Vladimir; Medvedev, Mikhail; Petryakov, A. V.; Трушкин, Н. И.; Shafikov, Airat

doi:10.1088/1742-6596/927/1/012051

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Several observations of the influence of the target on the plasma interacting with it have been made for non-thermal atmospheric pressure plasmas [1][2][3][4]. The target influences the abundance of OH in the discharge, where the OH concentration is higher when the discharge interacts with skin, liquid or metal when compared to a freely expanding jet [5,6].…”

Section: Introductionmentioning

confidence: 99%

How dielectric, metallic and liquid targets influence the evolution of electron properties in a pulsed He jet measured by Thomson and Raman scattering

Klarenaar

Guaitella

Engeln

et al. 2018

Plasma Sources Sci. Technol.

144

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Section: Introductionmentioning

confidence: 99%

How dielectric, metallic and liquid targets influence the evolution of electron properties in a pulsed He jet measured by Thomson and Raman scattering

Klarenaar

Guaitella

Engeln

et al. 2018

Plasma Sources Sci. Technol.

144

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“…Temperature should also be monitored as the nature of the biological target can potentially increase the gas temperature of the plasma high enough to induce thermal burns . As mentioned above, different biological targets (e.g., skin, tumor, and liquid) can change the plasma properties. − Experimental and numerical studies have shown that the biological target can change the distribution of the electric field originating from the plasma, density of the plasma ionization waves, production of reactive oxygen species (ROS), and the sterilization efficiency of the plasma. − , − Permittivity of the biological target is thought to be highly responsible for these effects. In electromagnetism permittivity is denoted as the electric polarizability of a dielectric.…”

Section: Parameters To Monitor At the Plasma–biological Target Interfacementioning

confidence: 99%

Opportunities of Electronic and Optical Sensors in Autonomous Medical Plasma Technologies

et al. 2023

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Low temperature plasma technology is proving to be at the frontier of emerging medical technologies with real potential to overcome escalating healthcare challenges including antimicrobial and anticancer resistance. However, significant improvements in efficacy, safety, and reproducibility of plasma treatments need to be addressed to realize the full clinical potential of the technology. To improve plasma treatments recent research has focused on integrating automated feedback control systems into medical plasma technologies to maintain optimal performance and safety. However, more advanced diagnostic systems are still needed to provide data into feedback control systems with sufficient levels of sensitivity, accuracy, and reproducibility. These diagnostic systems need to be compatible with the biological target and to also not perturb the plasma treatment. This paper reviews the state-of-the-art electronic and optical sensors that might be suitable to address this unmet technological need, and the steps needed to integrate these sensors into autonomous plasma systems. Realizing this technological gap could facilitate the development of next-generation medical plasma technologies with strong potential to yield superior healthcare outcomes.

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“…This could be a metallic surface being treated/decontaminated or a wound being disinfected. It is now well known that any object in close vicinity of the plasma plume will change the dynamics of the plasma (Akishev et al 2017;Kovačević et al 2018;. The addition of a target has already been shown to increase helium metastable densities (Urabe et al 2010;Zaplotnik et al 2016) and electron densities in close proximity to the target (Klarenaar et al 2018;Hofmans et al 2020;.…”

Section: Introductionmentioning

confidence: 99%

“…It is now well known that any object in close vicinity of the plasma plume will change the dynamics of the plasma (Akishev et al. 2017; Kovačević et al. 2018; Sobota et al.…”

Section: Introductionmentioning

confidence: 99%

Optical diagnosis of a kHz-driven helium atmospheric pressure plasma jet

et al. 2022

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This paper focuses on utilizing several different optical diagnostics to experimentally characterize a pure helium atmospheric pressure plasma jet. Axial electric field measurements were carried out along the plasma plume through the use of a non-perturbing method based on polarization-dependent Stark spectroscopy of the helium $492.2$ nm line. The electric field is shown to increase with distance along the plume length, reaching values as high as $24.5$ kV cm $^{-1}$ . The rate of increase of the electric field is dependent on the helium gas flow rate, with lower gas flows rising quicker with distance in comparison with larger flow rates, with the typical values remaining within the same range. This sensitivity is linked to gas mixing between the helium and surrounding ambient air. Schlieren imaging of the gas flow is included to support this. The addition of a target is shown to further increase the measured electric field in close range to the target, with the magnitude of this increase being strongly dependent on the distance between the tube exit and target. The relative increase in the electric field is shown to be on average greater for a conducting target of water in comparison with plastic. A minimal equipment optical configuration, which is here referred to as fast two-dimensional monochromatic imaging, is introduced as an approach for estimating excited state densities within the plasma. Densities of the upper helium states for transitions, $1s3s$ $^{3}S_{1}$ $\rightarrow$ $1s2p$ $^{3}P^{0}_{0,1,2}$ at $706.5$ nm and $1s3s$ $^{1}S_{0}$ $\rightarrow$ $1s2p$ $^{1}P^{0}_{1}$ at $728.1$ nm, were estimated using this approach and found to be of the order of $10^{10}$ – $10^{11}$ cm $^{-3}$ .

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Influence of DC and AC external electric field on the propagation of “plasma bullets” along DBD helium plasma jet

Cited by 10 publications

References 4 publications

How dielectric, metallic and liquid targets influence the evolution of electron properties in a pulsed He jet measured by Thomson and Raman scattering

How dielectric, metallic and liquid targets influence the evolution of electron properties in a pulsed He jet measured by Thomson and Raman scattering

Opportunities of Electronic and Optical Sensors in Autonomous Medical Plasma Technologies

Optical diagnosis of a kHz-driven helium atmospheric pressure plasma jet

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