Bulletin of the American Physical Society
68th Annual Gaseous Electronics Conference/9th International Conference on Reactive Plasmas/33rd Symposium on Plasma Processing
Volume 60, Number 9
Monday–Friday, October 12–16, 2015; Honolulu, Hawaii
Session NR1: Plasma Sources for Biomedical Applications I |
Hide Abstracts |
Chair: Alexander Fridman, Drexel University Room: 301 B |
Thursday, October 15, 2015 8:00AM - 8:30AM |
NR1.00001: Design and characterization of an RF excited micro atmospheric pressure plasma jet for reference in plasma medicine Invited Speaker: Volker Schulz-von der Gathen Over the last decade a huge variety of atmospheric pressure plasma jets has been developed and applied for plasma medicine. The efficiency of these non-equilibrium plasmas for biological application is based on the generated amounts of reactive species and radiation. The gas temperatures stay within a range tolerable for temperature-sensitive tissues. The variety of different discharge geometries complicates a direct comparison. In addition, in plasma-medicine the combination of plasma with reactive components, ambient air, as well as biologic tissue - typically also incorporating fluids - results in a complex system. Thus, real progress in plasma-medicine requires a profound knowledge of species, their fluxes and processes hitting biological tissues. That will allow in particular the necessary tailoring of the discharge to fit the conditions. The complexity of the problem can only be overcome by a common effort of many groups and requires a comparison of their results. A reference device based on the already well-investigated micro-scaled atmospheric pressure plasma jet is presented. It is developed in the frame of the European COST initiative MP1101 to establish a publicly available, stable and reproducible source, where required plasma conditions can be investigated. Here we present the design and the ideas behind. The presentation discusses the requirements for the reference source and operation conditions. Biological references are also defined by the initiative. A specific part of the talk will be attributed to the reproducibility of results from various samples of the device. [Preview Abstract] |
Thursday, October 15, 2015 8:30AM - 8:45AM |
NR1.00002: Development challenges for Low Temperature Plasma Sources ``from Idea to Prototype'' T. Gerling, J.-S. Baudler, S. Horn, M. Schmidt, K.-D. Weltmann While plasma medicine is a well-motivated and intensively investigated topic, the requirements on the plasma sources change for individual applications. For example in dermatology, a large scale treatment is favored, while in dentistry, a localized application of plasma sources is required. Meanwhile, plasma source development is based on feasibility and not on the application. When a source is developed, it is usually motivated towards an application instead of considering an application and designing a plasma source to fit its needs. Each approach has its advantage and can lead to an advance in the field. With this contribution, we will present an approach from idea to prototype and show challenges in the plasma source development. For example, the consideration of legal regulations, adaption of the plasma source for a specific field of application and the interplay of gas flow dynamics with electrical field distribution. The solution was developed within several iterations to optimize it for different requirements. The obstacles that occurred during the development process will be highlighted and discussed. Afterwards the final source is characterized for a potential medical application and compared directly with a plasma source certified as a medical product. [Preview Abstract] |
Thursday, October 15, 2015 8:45AM - 9:00AM |
NR1.00003: Experimental and numerical study on the dynamics of a $\mu$s helium plasma gun discharge with various amounts of N$_2$ admixture Anne Bourdon, Thibault Darny, Eric Robert, Francois Pechereau, Pedro Viegas, Jean-Michel Pouvesle These last years, atmospheric pressure plasma jets formed by pulsed helium discharges ignited in thin dielectric tubes have been extensively studied due to their potential for biomedical applications. So far, most experiments have been dedicated to the study of the plasma plume. For endoscopic treatments, it is also important to better understand and optimize the propagation of discharges in long dielectric tubes as catheters. First we present an experimental and numerical study on the dynamics of a $\mu$s helium plasma discharge with N$_2$ admixture in a long dielectric tube. We compare the velocity of the discharge front for various amounts of N$_2$ and different applied voltages and show a good agreement between experiments and simulations. Second, we compare time-resolved measurements and simulations of longitudinal and radial electric fields associated with plasma propagation in the dielectric tube and in the plasma plume. It is interesting to note that measurements obtained with a probe located outside the dielectric tube are in excellent agreement with simulations. This allows to infer from simulations the time evolution of the electric field on the discharge axis which is a key parameter for applications. [Preview Abstract] |
Thursday, October 15, 2015 9:00AM - 9:30AM |
NR1.00004: Dynamics of filamentary plasma jets used in plasma medicine Invited Speaker: Stephan Reuter Atmospheric plasmas exhibit large gradients in space and time. This challenges diagnostics such as LIF or other quantitative species detection methods. Single shot and 2D measurements can supply information otherwise hidden in averaging single point measurements. Especially the interaction of jet like plasmas with ambient surroundings poses unmet challenges. In the present work, several approaches of laser diagnostics of plasma and gas phase combined with numerical simulation sow how a careful study of the plasma initiated processes can lead to an at least partial understanding of plasma interaction with liquid and biological systems.\\[4pt] In collaboration with Ansgar Schmidt-Bleker, INP Greifswald e.V.; Sylvain Iseni, GREMI, UMR 7344, CNRS/Universit\'e d'Orl\'eans; and J\"orn Winter, Helena Jablonowski, and Klaus-Dieter Weltmann, INP Greifswald e.V. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700