Speaker
Description
See full abstract here:
http://ocs.ciemat.es/EPS2019ABS/pdf/P4.3010.pdf
Atmospheric pressure plasma jets (APPJs) today serve as a tool for treating various surfaces from metals to polymers and biological tissues sensitive to temperature [1]. Adhesion, hydrophilic and bacteriostatic properties of the surface can be changed under plasma treatment. The latest studies showed that not only the plasma affected the object, but also the object could influence the plasma. It was shown in [2] that the target conductivity influenced on the production of reactive species in the plasma. This work was conducted to study the jet propagation, its current and intensity in dependence of the target. An electrophysical installation consisted of a DBD plasma jet source [3] with a solid-state power pulse supply system [4], targets with different conductivity: copper with σ= 6x10^7 S/m, medical conductive gel Uniagel with σ = 1 S/m and plexiglass with σ = 10^-13 S/m, and a diagnostic unit that allowed measuring the jet current and the jet intensity while propagating in the air. Rectangular unipolar pulses with an amplitude of 4-6 kV at 3 kHz frequency from the source were applied to the electrodes. The APPJ was formed in the air when pumping the tube with argon with a rate of 4 litres per minute. The plasma jet impinged on the target, located at a distance of 1.5 cm from the tube outlet. As a result, it was found that the presence of the target changed the parameters of the plasma jet. The conductivity of the target affects both the jet current amplitude and the jet intensity. This work was partially supported by the RFBR, grant N 19-08-00069a.
References
1. Winter, J., Brandenburg, R., & Weltmann, K. D. (2015). Atmospheric pressure plasma jets: an overview of devices and new directions. Plasma Sources Science and Technology, 24(6), 064001.
2. Koné, A., Sainct, F. P., Muja, C., Caillier, B., & Guillot, P. (2017). Investigation of the Interaction between a Helium Plasma Jet and Conductive (Metal)/Non-Conductive (Dielectric) Targets. Plasma Medicine, 7(4).
3. Moshkunov, S. I., Podguyko, N. A., & Shershunova, E. A. (2018, November). Compact high voltage pulse generator for DBD plasma jets. In Journal of Physics: Conference Series (Vol. 1115, No. 2, p. 022032). IOP Publishing.TCL
4. Moshkunov, S. I., Khomich, V. Y., & Shershunova, E. A. (2019). A high-voltage switching supply for cold plasma jets. Technical Physics Letters, 45(2), 93-95.
