Abstract
As the volume of a discharge cell is downsized, its optical emission intensity generally decreases owing to the increase in the loss of charged particles on the surfaces. To improve the emission intensity, in this paper, a new planar cell structure with floating electrodes inside a microdischarge cell is proposed in a dielectric barrier discharge (DBD) scheme. The spatiotemporal behavior was observed using an intensified charge-coupled device (ICCD) camera, and a twofold higher intensity enhancement all over the cell, especially around the floating electrodes, was obtained at most as compared with that of a simple structure without the floating electrodes. For the analysis of the discharge phenomena, a two-dimensional fluid simulation was performed, and the calculated results were in close agreement with those of the experimental data. Thus, the mechanism of the enhancement was attributed to the concentrated electric field around the floating electrodes owing to the electric charge accumulated during the preceding half-cycle of the discharge.
Published Version
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