SLS: Electric Field Measurements in Nanosecond Pulse Discharges in Atmospheric Pressure Air: Picosecond Four-wave mixing

Marien Simeni

All dates for this event occur in the past.

E525 Scott Lab
E525 Scott Lab
201 W. 19th Ave.
Columbus, OH 43210
United States

Temporally and spatially resolved electric field measurements in a nanosecond plasma discharge are presented. The studied discharge geometry is similar to those used for plasma flow actuation. The electric field together with electrons number density and electrons temperature are the three primary parameters controlling kinetic reactions occurring in nanosecond discharges. Especially, rates of energy partition in the internal energy modes of molecules are highly dependent on the reduced electric field E/N (electric field divided by the gas total number density). The electric field is measured using picosecond four-wave mixing. This laser diagnostic allows us to reach ~ 2 ns time resolution, ~ 100 um spatial resolution in addition to give us access to the field vectors components.