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Spatio-temporal dynamics of a nanosecond pulsed microwave plasma ignited by time reversal

Mazières, Valentin and Pascaud, Romain and Pascal, Olivier and Clergereaux, Richard and Stafford, Luc and Dap, Simon and Liard, Laurent Spatio-temporal dynamics of a nanosecond pulsed microwave plasma ignited by time reversal. (2020) Plasma Sources Science and Technology, 29 (12). 125017-125028. ISSN 0963-0252

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Official URL: https://doi.org/10.1088/1361-6595/abc9ff


In the present paper, the first spatio temporal characterization of a time reversal microwave plasma generated in argon is provided using imaging. This novel source allows to ignite a plasma at a desired location in a reverberant cavity by focusing the electromagnetic energy in time and space. An important feature is the possibility to control the plasma position only by changing the input microwave waveform. The source is operated in a repetitive pulsed mode with very low duty cycle (typically 0.05%). Nanosecond pulses have rise time lower than one nanosecond. The generated plasmas have typical sizes in the millimeter range and are observed for dozens of nanoseconds. The plasma behavior is investigated for different pressures and repetition frequencies. A strong dependence is observed between each discharge pulse suggesting the existence of an important memory effect. The latter is probably due to argon metastable atoms and/or residual charges remaining in the post-discharge and allowing the next breakdown to occur at a moderate electric field.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: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)
Other partners > Université de Montréal - UdeM (CANADA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:13 Jan 2021 09:30

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