Understanding of gas flow, plasma and target interplays: a key prerequisite for the optimization of plasma jet treatments
| Autor: | Robert, Eric, Darny, Thibault, Riès, Delphine, Sarron, Vanessa, Dozias, Sébastien, Pouvesle, Jean Michel |
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| Přispěvatelé: | Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | 5th International Conference on Plasma Medicine (ICPM5) 5th International Conference on Plasma Medicine (ICPM5), May 2014, Nara, Japan |
| Popis: | International audience; Plasma jets delivered at atmospheric pressure have been recently successfully used in an impressive number of experimental works including plasma diagnostics, biomedical treatments and material processing. The generation of plasma occurs in a simple discharge reactor and is then delivered either as a plasma effluent or propagates towards the target through fast ionization wave or streamers mechanisms. While the plasma source are very simple, it has been evidenced that many parameters may significantly influence the plasma characteristics offering at the same time a large versatility for plasma delivery but also requiring a special attention to match and characterize the plasma features for any specific application. In this work, emphasis will be given on two critical topics necessarily involved in any plasma jet biomedical applications. The first consists in the major influence of the target over which plasma jet impingement occurs. It has been shown that depending on the conductivity of the target, secondary plasma generation occurs from the target, leading to a critical modification of the reactive species (RS) generation. Preliminary results obtained during in situ OH radical LIF diagnostics and ICCD plasma imaging experiments confirm the influence of the properties of different water targets. The second main issue concerns the strong interplay between the rare gas flow (in most case helium, argon or neon) and the plasma species generated during plasma jet ionization wave propagation. Drastic modification of the rare gas flow features have been recently evidenced and characterized through Schlieren visualization, pressure measurements and ICCD imaging [1]. This work is supported by the APR Region Centre PLASMEDNORM and ANR 2010 BLAN 093001 PAMPA. References [1] E. Robert, V. Sarron, T Darny, D. Riès, S. Dozias, J Fontane, L. Joly and J.M. Pouvesle, Rare gas flow structuration in plasma jet experiment, Plasma Sources Sci. Technol. 23 0120003 (2014). |
| Databáze: | OpenAIRE |
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