Triangular lattice pattern with invisible Kagome lattice in dielectric barrier discharge system

Abstract

We present the triangular lattice pattern with the invisible Kagome lattice in the dielectric barrier discharge system with two water electrodes for the first time. The spatio-temporal dynamics studied by an intensified charge-coupled device (ICCD) show that the complex pattern is composed of four different sublattices: Kagome lattice, halos, and big and small spots (B and S). The invisible Kagome lattice is similar to the dark discharge because of its spatio-temporal randomness. Based on the novel discharges (B and S) occurring at the falling edge of applied voltage, the dynamics of surface charges is investigated and demonstrated with a high speed video camera and photomultiplier tubes. Furthermore, the formation of restricted random structures is considered to be the effect of previous discharges which rearrange the surface charges.

Formation of honeycomb-Kagome hexagonal superlattice pattern with dark discharges in dielectric barrier discharge

“…In this experiment, the pd value (the product of the gas pressure p and width of discharge gap d) is about 22.5 Torr•cm. The pd value is lower than those of previously reported patterns with sub-lattices that are composed of discharge filaments in dozens of Torr cm to hundreds of Torr cm [16][17][18][19]. Under this pd value, there not only exist discharge filaments that make up the previously reported pattern, but also dark discharges exist that are invisible to the naked eye or an ordinary camera.…”

“…Dong Lifang et al reported a Kagome lattice with discrete spots clearly visible to the naked eye in a complex hexagonal superlattice pattern [16]. Sun Haoyang et al isolated a Kagome lattice based on the triangular pattern which is invisible to the naked eye [17]. In this article, a new Kagome lattice with invisible frameworks and dim-spots in the honeycomb-Kagome hexagonal superlattice pattern with dark discharges is exhibited in a DBD system.…”

“…In 2013, Fan Weili et al presented dark discharge through a twodimensional particle-in-cell simulation with Monte Carlo collisions included [24]. However, there are few relevant reports of experimental studies at present [17]. Here, two different sub-lattices which are composed of dark discharges are obtained by ICCD in the honeycomb-Kagome hexagonal superlattice pattern with dark discharges.…”

“…In recent years, the DBD system, known for its incredible accessibility and utility for experimental devices, has been verified as an amazing and preferred system for the investigation of pattern dynamics, because it exhibits an exceptionally great variety and abundance of self-organized patterns [16][17][18][19][20][21][22][23]. Due to the luminous intensity, there not only exist visible discharge filaments to the naked eye or an ordinary camera, which is called normal discharge, but also discharge filaments exist that are invisible to the naked eye or an ordinary camera, which called dark discharge in the DBD system.…”

Nonlinearity of initiating and extinguishing boundaries of DBDs with airflows

“…With the change in airflow velocity, the influence of the airflow on the discharge results in complex changes. Considering the coupling effect between the charge accumulation on the wall of the dielectric plates and the boundary layer, the process of airflow through the plates is often accompanied by electrostatic force between charged particles and wall charges, collisions and ionization processes between particles and ions, and friction on the surface of the dielectric plate, etc [11,45]. These complicated effects show that the influence of airflow on discharge is in accordance with complex laws.…”