Abstract
The change in the distribution pattern of negative ions HO–, NO\(_{x}^{-}\) and CO\(_{x}^{-}\) observed on arbitrary point-to-plane electrode configuration has been investigated by varying the angle of needle to the plane electrode, under atmospheric pressure corona discharge conditions. The stationary inhomogeneous electric field distributions between the point-to-plane electrodes with arbitrary needle angle were calculated. The experimental and theoretical results obtained suggested that the negative ion evolutions progress along field lines established between the electrodes with arbitrary configurations and the resulting terminal ion formation on a given field line is attributable to the electric field strength on the needle tip surface where the field line arose. The NO\(_{x}^{-}\) and CO\(_{x}^{-}\) ions were dominantly produced on the field lines arising from the needle tip apex region with the highest electric field strength, while the field lines emanating from the tip peripheral regions with lower field strength resulted in the formation of the HO– ion.
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Sekimoto, K., Takayama, M. Negative ion formation and evolution in atmospheric pressure corona discharges between point-to-plane electrodes with arbitrary needle angle. Eur. Phys. J. D 60, 589–599 (2010). https://doi.org/10.1140/epjd/e2010-10449-7
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DOI: https://doi.org/10.1140/epjd/e2010-10449-7