Décharge à Barrière Diélectrique de Surface: Physique et procédé

Abstract : The thesis focuses on the development of a dielectric barrier discharge surface for air pollution control. This is a topic quite relevant. Indeed the application of regulations on air quality requires new technologies. Among them, the cold plasma decontamination is a candidate could not be more promising. In this context, it is necessary to know how to approach the problem from different aspects: The first course is to understand the basic physics of this type of plasma. This requires an experimental approach adapted to the scale of the phenomenon. These discharges consist of small filaments (a few hundred micrometers in diameter, a few centimeters long) spreading very quickly, with a very short lifetime (a few tens of nanoseconds). These characteristics make it difficult objects to study. The results showed the phenomena of miniaturized plasma filaments. This behavior is entirely explained by the original memory effect of the dielectric surface, which can hold loads over very long times (several minutes). These charges can then be photodésorbées and trigger the departure of several streamers in a short time (40 ns). The organization and the spread of the filaments were studied by ICCD imaging with a temporal resolution refined nanosecond. The second aspect is to identify the qualities of the system which can be exploited in terms of process: chemical efficiency, energy cost, the device geometry. The identification of these points has a patent on the system. Subsequently, a market research work has been done through mentoring of students ISTIA (Institut des Sciences et Techniques de l'Ingénieur d'Angers) for their internship M2.
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  • HAL Id : pastel-00004783, version 1

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Katia Allegraud. Décharge à Barrière Diélectrique de Surface: Physique et procédé. Physique [physics]. Ecole Polytechnique X, 2008. Français. ⟨pastel-00004783⟩

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