Discharge dynamics of ionization wave manipulated by electrical potential amplitudes in atmospheric pressure plasma jet

The auxiliary pulse voltage on the discharge dynamics of ionization wave in atmospheric pressure plasma jet is investigated by both experimental and numerical methods. The distribution of electrical potential is modified by the introduction of auxiliary pulse voltage. The velocity and intensity of ionization wave in terms of plasma bullet is enhanced by reducing the amplitude of auxiliary pulse voltage. The uniformly distributed electron and ion density are obtained by raising the amplitude of auxiliary pulse voltage. By reducing the amplitude of auxiliary pulse voltage, the ion and electron density are concentrated in the ionization wave front, which improves the radial electric field and expands the radial size of plasma bullet. It shows that the electric field, the ion and electron density, and the electron temperature can be enhanced by elevating the amplitude difference between the internal and the applied auxiliary electrical potential.