Characterization of plasma jets in interaction with targets relevant for biomedical applications by complementary diagnostics
Résumé
In the last decade, plasma jets generated in ambient air at room temperature have found an impressive number of material processing and biomedical applications [1, 2]. While being generated in simple discharge reactors, dielectric barrier discharge or miniaturized plasma torch, it has been rapidly evidenced that their reliable operation and diagnostics was quite challenging and strongly application dependent. In this invited lecture, we will emphasize on the necessity and benefit first to perform plasma diagnostics not only in situation of free jet expansion but more informatively with including target used or mimicking those involved for plasma jet in operation for any dedicated application. It is also crucial to perform combined diagnostics to entangle the number and cross correlated physico chemical phenomena inherent with plasma jet delivery. Recent measurements including gas flow diagnostics with or without plasma operation through Schlieren visualization, species density assessment with IR laser absorption or laser induced fluorescence techniques [3], plasma propagation dynamics and emission diagnostics with fast, eventually wavelength filtered, ICCD imaging, but also electric field measurements [4] will be presented. The necessity to combine various experimental data but also the confrontation with simulation results [5] will be enlighten in the diagnostics of electric fields, radical generation over surface, helium metastable generation and discharge propagation and counter propagation on metallic targets.
Acknowledgments
X.D. is supported through a Région Centre Val de Loire/INEL PhD fellowship.
References
[1]Penkov O.V. et al, J. Coat. Technol. Res., 12 (2), 225-23 (2015)
[2]Laroussi M , IEEE Trans. Plas.Sci., 43 (3), 703-712 (2015)
[3]Ries D. et al, J. Phys. D: Appl. Phys. 47 275401 (2014)
[4]Robert E. et al, Phys. Plasmas, 22, 122,007 (2015)
[5]Bourdon A. et al, accepted PSST (2016)