On Various Kinds of Dielectric Barrier Discharges

Abstract

SummaryDielectric barrier discharges in Xe and Ne/Xe, He/Xe mixtures are investigated with regard to the ranges of existence of various discharge types over a wide range of parameters (total gas pressure p , electrode distance d, frequency f and mixture ratio X). The discharges were explained in more detail because of the bistable behaviour and the transfered charges, partly of the peak current and the maximum of the visible radiation pulse. The time behaviour of the discharge was observed, too. In this paper a distinction of various discharge types could be achieved by the similarity parameters f/p and pd. The charge carriers remaining in the volume and long-living plasma species could be identified as essential mechanisms for the development of various types of discharges. The influence of space charges on the bistable behaviour could be shown indirectly.

Exploring the mechanisms leading to diffuse and filamentary modes in dielectric barrier discharges in N$$_2$$ with N$$_2$$O admixtures

“…Due to this fast quenching process, no significant amount of metastable nitrogen is present in between the active APTD phases as soon as elevated amounts of N 2 O are mixed to N 2 . For virtually pure N 2 or very low N 2 O admixtures, however, the larger concentration of N 2 (A) remains between individual discharges, which means that a significant N 2 (C) density is also generated in between the active APTD phases by the pooling reaction (5). This explains the emission in the gap during the complete HV period for virtually pure N 2 , see e.g.…”

“…Non-thermal plasmas generated by DBDs are usually filamentary [3], but at specific conditions, diffuse or uniform discharges are obtained [4][5][6][7][8][9]. These diffuse DBDs are attractive for surface deposition applications, as linear processing with less sophisticated vacuum technology can be realised while enabling a homogeneous surface treatment [10,11].…”

Charge neutralization of submicron aerosols using surface-discharge microplasma

“…A large fraction of the electron energy released by the microdischarge can be used to dissociate molecules and thereby produce ions. The wide range of discharge characteristics observed are known to depend on factors such as the DBD geometry, material, type of applied voltage, and so on (Müller & Zahn, 1996;Gibalov & Pietsch, 2000;Abdel-Salam et al, 2003). The typical voltage type used to induce surface discharge is an alternating voltage; however, the DC pulse can be utilized also (Reitz, Salge, & Schwarz, 1993;Liu & Neiger, 2001).…”

Dielectric-Barrier Discharges. Principle and Applications

“…The enclosed area is always proportional to the power independent of such assumptions. According to Miiller and Zahn [23] DBDs can exhibit different modes depending on the gas and the operating conditions. From voltagelcharge diagrams Manley in 1943 [24] derived the power formula for ozonizers which applies to many DBDs.…”

“…Typical examples are the formation of Xe, or XeCl excimer complexes, one of which is formed essentially from neutral excited atoms the other mainly via recombination of ions. The most important reactions are [1 11: Xe,* Xe + Xe + VUV radiation (23) XeCl*…”