The corona discharge obtained in atmospheric air between a wire and two plates is presented. For the configuration studied and the voltage applied, the current is steady for the positive corona and exhibits Trichel pulses in the negative corona. The positive corona produces a homogeneous blue halo around the wire, whereas the negative discharge produces evenly spaced spots on the wire surface. We verified the analytic prediction that the ionic wind varies as the square root of the mean current for both the positive and negative polarities. The measured ionic wind produced by the positive corona is higher than for the negative corona. We propose an explanation for the difference of velocity between polarities.
Bibliographical noteFunding Information:
Manuscript received November 30, 2010; revised July 5, 2011; accepted July 7, 2011. Date of publication August 18, 2011; date of current version November 9, 2011. This work was supported in part by Délégation Générale pour l’Armement and in part by CNRS.
- Atmospheric-pressure plasmas
- glow discharges
- plasma measurements
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Condensed Matter Physics