Electrical Model in Helium Dielectric Barriier Discharge (Dbd)

Abstract

An electric model created by Simulink/Matlab is used to describe the main characteristics of a plasma dielectric barrier discharge (DBD) at atmospheric pressure under a flow of helium gas. The model is based on a voltage controlled current source and a variable gap capacitor. The applied voltage, the corresponding current, gap voltage and dielectric voltage are the main characteristic investigated in the present work. The applied sinusoidal voltage to the electrodes is generated by an induction coil transformer at 5.7 kHz. Experimental measurements are made to extract some DBD parameters and validate the model results.

Electrical equivalent model of a long dielectric barrier discharge plasma jet for endoscopy

“…As in DBD, the ionization degree is low, and the current (indicating the presence of new charges) is limited by the dielectric barrier, the conductivity of ignited plasma is relatively stable during plasma on-phase. It can reasonably be assumed constant during this phase (i.e., the ionization degree does not drastically increase once the plasma is ignited) [34][35][36][37][38][39][40] and a resulting constant resistance value has, for example, been estimated as V b /I peak [36,40].…”

“…It can reasonably be assumed constant during this phase (i.e. the ionization degree does not drastically increase once the plasma is ignited) [34][35][36][37][38][39][40] and a resulting constant resistance value has, for example, been estimated as V b /I peak [36,40].…”

“…Many alternatives have been proposed, based on Manley's electrical equivalent circuit. More precisely, the dynamics of the time-variable impedance of figure 1(a) has been modelled in different ways by various team [34][35][36][37][38][39][40][41][42][43][44][45][46]. However, these models do not simulate the behaviour of a long plasma jet in a catheter of 2 m.…”