Charging of Surfaces with a Wire Corona Discharge: Simulations of Plasma Hydrodynamics with Moving Surfaces
Abstract:Atmospheric pressure corona electric discharges are important components of electrophotographic (EP) printing technologies for charging surfaces and photoconductors. A typical corona discharge consists of a wire biased with dc potential of 100's V plus a few kV of ac bias. An electric discharge is produced around the corona wire from which electrons drift along the applied electric field to charge the underlying surface. This reduces the voltage drop across the gap which then terminates the discharge. In printing this underlying surface is continuously moving during charging. As a result, the corona discharge is re-ignited by the increased voltage drop provided by the incoming uncharged surface. To aid in development of these devices, an investigation based on first principles, multi-dimensional computer modeling has been conducted. We found that the uniformity of the summation of these charging cycles is sensitive to the conductivity, dielectric constant and speed of the moving surface, and the voltage waveform. Parametric results for charging of surfaces while varying these parameters will be discussed.
Document Type: Research Article
Publication date: 2012-01-01
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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