Title :
Visualization of a Spark Discharge Driven by a High-Voltage Pulse With Sub-ns Rise-Time at Atmospheric Pressure
Author :
Huiskamp, T. ; Höft, Hans ; Kettlitz, Manfred ; Pemen, A.J.M.
Author_Institution :
Dept. of Electr. Eng., Pulsed Power Technol., Eindhoven Univ. of Technol., Eindhoven, Netherlands
Abstract :
A spark discharge generated by a 5-ns highvoltage pulse of 21 kV with a rise-time of 200 ps in a 1-mm gap between half-sphere steel electrodes was investigated in N2-O2 gas mixtures at atmospheric pressure. We compared short exposure and long exposure ICCD images of the discharge, as well as single shot images and accumulated images. At high repetition rates more discharge channels form due to higher background ionization. The influence of the O2 concentration between 0.1 and 10 vol% O2 in N2 is insignificant.
Keywords :
ionisation; nitrogen; oxygen; plasma diagnostics; sparks; steel; N2-O2; background ionization; discharge channels; gas mixtures; half-sphere steel electrodes; high-voltage pulse; long exposure ICCD images; pressure 1 atm; repetition rates; short exposure ICCD images; single shot images; spark discharge visualization; time 5 ns; voltage 21 kV; Cameras; Discharges (electric); Electrodes; Fault location; Plasmas; Sparks; Atmospheric pressure plasmas; electric breakdown; pulsed power supplies; pulsed power supplies.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2321776
