Title :
Effect of shock wave propagation on plasma emission in a low pressure N2 discharge
Author :
Bletzinger, P. ; Ganguly, B.N. ; Garscadden, A.
Author_Institution :
Innovative Sci. Solutions Inc., Dayton, OH, USA
fDate :
4/1/2005 12:00:00 AM
Abstract :
The interaction between Mach 1.7 acoustic shock waves with 5 torr, 2.5 mA/cm2 current density glow discharges in nitrogen was quantified from current-voltage behavior and time resolved two-dimensional C-B plasma emission. These measurements are consistent with the formation of localized electric double layer sheaths traveling with the propagating shock wave. This space-charge layer provides local enhanced ionization at the shock front which permits maintenance of the discharge current continuity, at least during the short shock propagation time, when the decrease in E/N, (E-electric field and N-gas density) behind the shock produces a dark discharge spanning the entire 30-cm column length.
Keywords :
current density; glow discharges; ionisation; nitrogen; plasma density; plasma diagnostics; plasma pressure; plasma sheaths; plasma shock waves; plasma transport processes; space charge; 30 cm; 5 torr; Mach 1.7 acoustic shock waves; N2; current density glow discharges; current-voltage behavior; dark discharge; discharge current continuity; enhanced ionization; gas density; localized electric double layer sheaths; low pressure N2 discharge; nitrogen; shock front; shock wave propagation; space-charge layer; time resolved two-dimensional C-B plasma emission; Acoustic emission; Acoustic propagation; Acoustic waves; Current density; Electric shock; Glow discharges; Plasma density; Plasma measurements; Plasma waves; Shock waves; Glow discharges; optical imaging; shock waves;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2005.844992
