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A harmonic oscillator model to study the intensification of microwave radiation by a subwavelength uniform plasma discharge

Laffont, Adrien and Pascaud, Romain and Callegari, Thierry and Liard, Laurent and Pascal, Olivier and Adam, Jean-Pierre A harmonic oscillator model to study the intensification of microwave radiation by a subwavelength uniform plasma discharge. (2021) Physics of Plasmas, 28 (3). 033503. ISSN 1070-664X

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Official URL: https://doi.org/10.1063/5.0038640

Abstract

A harmonic oscillator model is proposed to study the intensification of microwave radiation of an electrically small antenna when surrounded by a subwavelength plasma discharge. This model describes the oscillations of free electrons in a spherical plasma when it is excited by an incident electromagnetic wave. It shows that at resonance, these charge oscillations lead to a significant volume current, and thus to an enhancement of the radiation. Depending on the electron density of the plasma, this radiation enhancement may occur in the microwave range. The proposed model is compared with the Mie scattering theory with perfect agreement when the electrical size ka of the spherical plasma remains smaller than 0.1. Despite its apparent simplicity, this model unveils the main mechanism that stands behind the intensification of microwave radiation by a subwavelength plasma discharge.

Item Type:Article
Additional Information:https://publishing.aip.org/resources/researchers/policies-and-ethics/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
DGA - AID - Région Occitanie
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Deposited On:04 Mar 2021 14:58

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