Spectroscopic studies of non-thermal plasma jet at atmospheric pressure formed in low-current nonsteady-state plasmatron for biomedical applications

Abstract

The optical and electrophysical characteristics of the nonequilibrium low-temperature plasma formed by a low-current nonsteady-state plasmatron are experimentally investigated in the present work. It is demonstrated that experimental data on the optical diagnostics of the plasma jet can provide a basis for the construction of a self-consistent physical and mathematical plasma model and for the creation of plasma sources with controllable electrophysical parameters intended for the generation of the required concentration of active particles. Results of spectroscopic diagnostics of plasma of the low-current nonsteady-state plasmatron confirm that the given source is efficient for the generation of charged particles and short-wavelength radiation—important plasma components for biomedical problems of an increase in the efficiency of treatment of biological tissues by charged particles. Measurement of the spatial distribution of the plasma jet potential by the probe method has demonstrated that a negative space charge is formed in the plasma jet possibly due to the formation of electronegative oxygen ions.

Nonsteady-state processes in a low-current discharge in airflow and formation of a plasma jet

“…A variety of the discharge types and the electrode configurations are used in the experiments [2,3,[6][7][8][9][10][11][12][13][14][15][16]. The present paper deals with the glow-type discharge in airflow in the electrode system of the classical coaxial plasmatron [3,[17][18][19][20][21][22].…”

Numerical study on an atmospheric pressure helium discharge propagating in a dielectric tube: influence of tube diameter

“…Non-equilibrium atmospheric pressure plasmas jets (APPJs) have been extensively investigated because they were widely used in materials processing and plasma biomedicine [1][2][3][4].…”