Experimental–Numerical Characterization of Cold Atmospheric Pressure Plasma Jet for Biomedical Applications Using Moiré Deflectometry
DOI:
https://doi.org/10.63053/ijhes.186Keywords:
Cold atmospheric plasma, Moiré deflectometry, Biomedical application, Electron density, Refractive indexAbstract
Cold atmospheric pressure plasma jets (CAPJs) have attracted considerable attention for biomedical applications due to their non-thermal behavior and their ability to generate a high density of reactive species. In this study, an integrated experimental–numerical approach is employed to characterize the propagation dynamics and refractive-index variations induced by a CAPJ using Moiré deflectometry. This optical technique, based on wavefront analysis and geometric optics, enables precise detection of refractive-index gradients generated in the jet–ambient interface. As the plasma jet interacts with the surrounding environment, the resulting changes in optical path manifest as fringe deflections, which are recorded using a CCD camera. By applying improved digital image-processing algorithms developed in MATLAB, the refractive-index field and associated plasma parameters are quantitatively reconstructed with high accuracy. The results demonstrate that Moiré deflectometry is a powerful, non-intrusive diagnostic tool for resolving small refractive-index variations and understanding CAPJ behavior, providing valuable insights for optimizing plasma sources in biomedical applications
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