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The discharge is taking place in normal atmospheric air, at about 30 kHz, with a discharge gap of about 4 mm. The foot of the discharge is the charge accumulation on the barrier surface. Dielectric-barrier discharge (DBD) is the electrical discharge between two electrodes separated by an insulating dielectric barrier [1].
A dielectric barrier discharge at 30 kHz in air between metal electrodes separated by two dielectric mica sheets with a gap of 4 mm. The "foot" of the discharge is the charge accumulation on the barrier surface. Dielectric barrier discharge occurs between two electrodes separated by a dielectric.
The surface temperature plays an important role in limiting the usefulness of a dielectric barrier discharge plasma actuator. The thrust produced by an actuator in quiescent air increases with a power law of the applied voltage.
Dielectric barrier discharge (DBD) is one of the main ways to produce low-temperature plasmas in a non-equilibrium condition at atmospheric pressure. [ 4 ] [ 5 ] Additionally, there have been reports stating that the Atmospheric-pressure glow discharge, when powered by a low-frequency (10-100 kHz) source, needs a dielectric barrier on one side ...
The usage of dielectric barrier discharge enables a stable plasma at atmospheric pressure. To avoid sparks, a dielectric has to be fixed on one or both electrodes. The shape of the electrode is similar to the substrate geometry used to cover the entire surface. The principle of an AP-activation with one dielectric barrier is shown in figure ...
Change in the discharge type. Inserting a dielectric material in a discharge region leads to a shifting in the discharge type. From a filamentary regime a mixed filamentary/surface discharge is established. Ions, excited species and radicals are formed in a wider region if a surface discharge regime is present. [50]
The discharge current is sourced from the surface of the dielectric. The power of the dielectric barrier discharge is significantly higher than that of the corona discharge, but smaller comparing to the arc discharge. All these types of electric discharges require high voltage electronics and high voltage cabling.
Dielectric-barrier discharges are a type of plasma source that limits the current using a dielectric that covers one or both electrodes. The DBD was the plasma source used in the mid-1990s in the early groundbreaking work on the biomedical applications of cold plasma. [5]