Effect of Additional Pin Electrode Placing at the Bottom of the Plasma Jet and Flow Behavior on Radical Generation and Propagation

Fernando, W. T. L. S.; Takahashi, Keníchi; Kikuchi, Takashi; Sasaki, Toru

doi:10.1109/tps.2020.3000570

Cited by 4 publications

(1 citation statement)

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“…This can be a problem because plasma jets interact strongly with metals and, therefore, the results may not be accurate in this case. In addition, a thermocouple can also act as a floating electrode when in contact with the plasma jet, eventually influencing the discharge parameters [36,37]. This can be avoided if the probe is covered with a dielectric material, as in [35].…”

Section: Introductionmentioning

confidence: 99%

On the gas heating effect of helium atmospheric pressure plasma jet

2023

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Plasma medicine is an emerging research ﬁeld which has been driven by the development of plasma sources suitable to generate low temperature plasmas. In many cases, such devices can operate without a gas ﬂow, producing a plasma discharge from the ambient air. However, the most common case is the use of a working gas at a given ﬂow rate to produce a plasma jet. Helium (He) is one of the gases commonly used as the carrier gas to generate cold atmospheric pressure plasma jets (CAPPJs) due mainly to the easiness to ignite a gas discharge with it. However, in this work it was observed that most of the heating of a He CAPPJ can come just from the expansion of the He gas. This was found through measurements of gas temperature (Tgas), using ﬁber optic temperature (FOT) sensors, and thermal output, using both FOT and infrared imaging with the He ﬂow impinging on a copper (Cu) plate. Such ﬁndings were achieved through comparisons of Tgas and the temperature on the Cu (TCu) plate in the conditions with and without discharge ignition, as well as comparing Tgas in the free gas/jet mode with and without discharge ignition. It was veriﬁed that the Tgas values increased as the distance from the gas outlet was enlarged, especially at low He ﬂow rates, even without discharge ignition. Despite the temperature increase with distance, it is possible to produce plasma jets with temperatures lower than 40 °C at low He ﬂow rates.

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Section: Introductionmentioning

confidence: 99%

On the gas heating effect of helium atmospheric pressure plasma jet

2023

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Double tube configuration of atmospheric pressure plasma jet for deposition of organic coatings in open air

Anagri,

Baitukha,

Pulpytel

et al. 2024

Chemical Engineering Research and Design

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Using numerical analysis of ordinary differential equation systems to predict the chemical concentration after plasma irradiation

et al. 2022

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In this study, a zero-dimensional numerical simulation of the atmospheric pressure plasma (APP) interface with a liquid solution was performed. By assuming that the solution reaction is dependent on the injection of radicals and electrons, we were able to obtain a single short APP discharge with the liquid solution. This study can predict excitation temperature, electron temperature, and population densities of species and result in optimum conditions for a chemical reaction for the synthesis of nanoparticles or other applications of the reaction between APP and liquid surface. This work aims to explain the effect of pH values on the synthesis of gold nanoparticles compared with experimental results. We found that the effect of pH value is expected to impact the generation of gold nanoparticles. Therefore, a high pH value is suitable for generating gold atoms for nano-synthesis. The fundamental plasma properties, such as population density, electron temperature, excitation temperature, and gas temperature, and chemical reaction process were studied. The simulation results were consistent with the experimental observations.

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Effect of Additional Pin Electrode Placing at the Bottom of the Plasma Jet and Flow Behavior on Radical Generation and Propagation

Cited by 4 publications

References 50 publications

On the gas heating effect of helium atmospheric pressure plasma jet

On the gas heating effect of helium atmospheric pressure plasma jet

Double tube configuration of atmospheric pressure plasma jet for deposition of organic coatings in open air

Using numerical analysis of ordinary differential equation systems to predict the chemical concentration after plasma irradiation

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