# Causes of plasma column contraction in surface-wave-driven discharges in argon at atmospheric pressure.

@article{Ridenti2018CausesOP, title={Causes of plasma column contraction in surface-wave-driven discharges in argon at atmospheric pressure.}, author={Marco Antonio Ridenti and Jayr de Amorim and Arnaldo Dal Pino and Vasco Guerra and G. M. Petrov}, journal={Physical review. E}, year={2018}, volume={97 1-1}, pages={ 013201 } }

In this work we compute the main features of a surface-wave-driven plasma in argon at atmospheric pressure in view of a better understanding of the contraction phenomenon. We include the detailed chemical kinetics dynamics of Ar and solve the mass conservation equations of the relevant neutral excited and charged species. The gas temperature radial profile is calculated by means of the thermal diffusion equation. The electric field radial profile is calculated directly from the numerical…

## Figures and Tables from this paper

## 15 Citations

Surface-wave-sustained argon plasma kinetics from intermediate to atmospheric pressure

- PhysicsJournal of Physics D: Applied Physics
- 2018

Surface-wave-sustained discharges (SWDs) can operate across a wide range of discharge conditions. From low to atmospheric pressure, plasma sustained by travelling electromagnetic wave is strongly…

Implications of thermo-chemical instability on the contracted modes in CO2 microwave plasmas

- Physics, ChemistryPlasma Sources Science and Technology
- 2020

Understanding and controlling contraction phenomena of plasmas in reactive flows is essential to optimize the discharge parameters for plasma processing applications such as fuel reforming and gas…

Insight into contraction dynamics of microwave plasmas for CO2 conversion from plasma chemistry modelling

- PhysicsPlasma Sources Science and Technology
- 2020

This work addresses plasma chemistry in the core of a vortex-stabilized microwave discharge for CO2 conversion numerically, focusing on the pressure-dependent contraction dynamics of this plasma. A…

Two-Temperature Chemical Non-equilibrium Modeling of Argon DC Arc Plasma Torch

- Physics, Materials SciencePlasma Chemistry and Plasma Processing
- 2020

A 2D two-temperature chemical non-equilibrium model has been developed to investigate the plasma characteristics inside a DC arc plasma torch of argon. In this study the chemical kinetic model is…

Thermal instability and volume contraction in a pulsed microwave N2 plasma at sub-atmospheric pressure

- PhysicsPlasma Sources Science and Technology
- 2021

We studied the evolution of an isolated pulsed plasma in a vortex flow stabilised microwave (MW) discharge in N2 at 25 mbar via the combination of 0D kinetics modelling, iCCD imaging and laser…

Resolving discharge parameters from atomic oxygen emission

- Physics
- 2021

A method is proposed to spatially resolve discharge parameters from experimental measurements of emission intensity and 1D numerical simulations including an O atom collisional-radiative model. The…

Characterization of CO2 microwave plasma based on the phenomenon of skin-depth-limited contraction

- Physics
- 2019

The subatmospheric CO2 microwave plasma is known to contract to a narrow filament with rising pressure as result of a mode transition. This changing state of contraction is investigated in relation…

Role of thermal effects in neon and argon constricted discharges

- PhysicsPlasma Sources Science and Technology
- 2019

The paper is aimed at investigating the role of inhomogeneous heating of the neutral gas in a constricted glow discharge in neon and argon. It is shown that inhomogeneous heating is not the primary…

Instabilities of a constricted gas discharge with respect to two-dimensional wave perturbations

- PhysicsPlasma Sources Science and Technology
- 2019

Modelling of the positive column in the glow discharge of neon was performed under discharge conditions covering the areas of diffuse and constricted states, as well as the transition region between…

A New Stripline-Based Atmospheric Pressure Microwave Plasma Sheet Source Designed for Surface Modification of Materials

- PhysicsMaterials
- 2021

A new type of microwave plasma source is presented in which plasma at atmospheric pressure is generated inside a quartz rectangular flat box placed in a stripline supplied by a 2.45 GHz coaxial line, and the plasma generated has a larger volume than plasma generated using the rectangular waveguide.

## References

SHOWING 1-10 OF 105 REFERENCES

Modeling of atmospheric-pressure plasma columns sustained by surface waves.

- PhysicsPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2007

A self-consistent two-dimensional fluid-plasma model coupled to Maxwell's equations is presented for argon discharges sustained at atmospheric pressure by the propagation of an electromagnetic surface wave to describe the contraction phenomenon.

Modeling of microwave-induced plasma in argon at atmospheric pressure.

- PhysicsPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2012

The model describes in a self-consistent manner the gas flow and heat transfer, the in-coupling of the microwave energy into the plasma, and the reaction kinetics relevant to high-pressure argon plasma including the contribution of molecular ion species.

Experimental study of unconfined surface wave discharges at atmospheric pressure by optical emission spectroscopy

- Physics
- 2013

A surface wave discharge (SWD) in argon at atmospheric pressure generated by a surfatron device was studied by optical emission spectroscopy (OES). Two distinct situations were investigated; (i) a…

Experimental investigation of the electron energy distribution function (EEDF) by Thomson scattering and optical emission spectroscopy

- Physics
- 2012

The electron temperature of an argon surface wave discharge generated by a surfatron plasma at intermediate pressures is measured by optical emission spectroscopy (OES) and Thomson scattering (TS).…

Modeling of a plasma column produced and sustained by a traveling electromagnetic surface wave

- Physics
- 1989

We present an improved model of a plasma column produced and sustained by a traveling azimuthally symmetric electromagnetic surface wave. The axial density profile of the column as well as the wave…

The radial contraction of argon microwave plasmas studied by Thomson scattering

- Physics
- 2012

Radial electron density ne(r) and temperature Te(r) profiles of a microwave argon plasma at intermediate pressure were investigated by Thomson scattering. This method allows one to get ne(r) and…

Theoretical insight into Ar–O2 surface-wave microwave discharges

- Physics
- 2010

A zero-dimensional kinetic model has been developed to investigate the coupled electron and heavy-particle kinetics in Ar–O2 surface-wave microwave discharges generated in long cylindrical tubes,…

Energy Distribution of Electrons in High Frequency Gas Discharges

- Physics
- 1946

In this paper an equation for the energy distribution of electrons in a gas subject to a spatially constant high frequency field is obtained. The domain of applicability of the equation is limited…

A two-dimensional Plasimo multiphysics model for the plasma–electromagnetic interaction in surface wave discharges: the surfatron source

- Physics
- 2012

A novel electromagnetic (EM) model was developed using the Plasimo platform with the aim to study different microwave induced plasmas. In this study, the EM model is coupled to the fluid…

Experimental and theoretical study of atmospheric-pressure argon microplasma jets

- Physics
- 2015

Surface-wave discharges in argon at atmospheric pressure were experimentally studied by optical emission spectroscopy (OES) and mass spectrometry (MS). OES was employed to determine the rotational…