What question did this study set out to answer?

This research aims to understand how coil excitation frequencies and distances affect the performance of an RF-RF hybrid plasma torch.

February 8, 2026Open Access

Numerical simulations of a RF-RF hybrid plasma torch with argon at atmospheric pressure

Key Points

This research aims to understand how coil excitation frequencies and distances affect the performance of an RF-RF hybrid plasma torch.
Numerical simulations conducted using COMSOL Multiphysics software.
Assessment of coil excitation current at varying distances between coils.
Analysis of radial temperature profiles and axial velocities of the plasma.
Identified minimum sustaining coil excitation currents for two frequency settings.
Presented variation in radial temperature profiles with changing coil distance.
Compared heat convected at the medium-frequency coil with total heat conduction to the plasma wall.

Abstract

We report numerical results regarding the minimum sustaining coil excitation current for a RF-RF hybrid torch operating at two different frequencies. The first coil is excited at a high-frequency, while the second coil is set at a medium frequency. The filling gas is argon, at atmospheric pressure. We use the modeling software COMSOL Multiphysics to describe the evolution of key parameters when: (i) the distance between the two coils changes, (ii) the power of the high frequency coil changes. We discuss the radial temperature profiles, the axial velocities and the heat convected at the end of the medium-frequency coil. The latter is compared with the total heat conduction to the plasma confinement tube wall.

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Cite This Study

Terraz et al. (Thu,) studied this question.

synapsesocial.com/papers/698827f00fc35cd7a8846f58 https://doi.org/https://doi.org/10.5445/ir/1000190206

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