Ionization Mechanism in a Thermal Spark Discharge
| Autor: | Gabi-Daniel Stancu, Pierre Mariotto, Nicolas Minesi, Christophe O. Laux |
|---|---|
| Přispěvatelé: | Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion (EM2C), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Continuum (design consultancy) Resolution (electron density) Electron Nanosecond Kinetic energy 7. Clean energy 01 natural sciences 010305 fluids & plasmas symbols.namesake Stark effect [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] Ionization 0103 physical sciences Physics::Atomic and Molecular Clusters symbols Electron temperature Atomic physics |
| Zdroj: | AIAA Scitech 2021 Forum AIAA Scitech 2021 Forum, Jan 2021, VIRTUAL EVENT, France. ⟨10.2514/6.2021-1698⟩ |
| DOI: | 10.2514/6.2021-1698⟩ |
| Popis: | International audience; The formation of thermal sparks generated by nanosecond pulses is studied experimentally and numerically. The increase of the electron number density, up to 10 19 cm-3 , is measured with sub-nanosecond resolution using Stark broadening of N + , Stark broadening of Hα, continuum emission of the electron, and the intensity of N + lines. Our experimental results are then compared to 0-D kinetic simulations including the electron-impact ionization of excited electronic states of N and O. The electron temperature, in equilibrium with the gas temperature, reaches 42,000K, which agrees with our experimental findings and the literature on the thermal spark. |
| Databáze: | OpenAIRE |
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