Measurement of vibrationally excited N2(v) in an atmospheric-pressure air pulsed corona discharge using coherent anti-Stokes Raman scattering

摘要: Vibrationally excited N2(v = 1, 2) in an atmospheric-pressure air pulsed corona discharge was measured using coherent anti-Stokes Raman scattering (CARS). In a dry discharge, the vibrational temperature determined from ratio N2(v = 2)/N2(v = 0), Tv2, approximately 500 K higher than that N2(v = 1)/N2(v = 0), Tv1, immediately after pulse. Both temperatures reached equilibrium within 100 μs pulse by vibration-to-vibration (V-V) process of N2-N2. The translational also CARS. rise due to vibration-to-translation (V-T) energy transfer not observed for postdischarge time 5 μs–1 ms dry-air discharge. However, when humidified, significant V-T observed. It extremely rapid H2O-H2O following V-V N2-H2O. Measurements showed humidification ambient accelerated ...