We have applied Cavity Ring-Down Spectroscopy (CRDS) to investigate Nanosecond Repetitively Pulsed Discharge (NRPD) in nitrogen and air at atmospheric pressure in a pin-to-pin electrode configuration. We have measured the concentration of N2(A) by probing absorption transitions in the near Infrared at 770 nm. We report on preliminary results about the measurement of the N2(A) concentration and its evolution under different discharge regimes. We present here a comparison for an air plasma between the time evolution of N2(A) measured by CRDS and the temporal evolution of atomic oxygen measured by two-photon absorption laser-induced fluorescence (TALIF). This study will allow us to compare our experimental results to those given by a kinetic model and help provide a better understanding of the plasma physicochemical processes.
ASJC Scopus subject areas
- Physics and Astronomy(all)