The physics of vibrational kinetics in nitrogen-containing plasma produced by collisions with elec- trons is studied on the basis of recently derived cross sections and rate coefficients for the reso- nant vibrational-excitation by electron-impact. The temporal relaxation of the vibrational energy and of the vibrational distribution function is analyzed in a state-to-state approach. The electron and vibrational temperatures are varied in the range [0-50000] K. Conclusions are drawn with respect to the derivation of reduced models and to the accuracy of a relaxation time formalism. An analytical fit of the vibrational relaxation time is given.
Electron-vibration energy exchange models in nitrogen-containing plasma flows
V Laporta;D Bruno
2013
Abstract
The physics of vibrational kinetics in nitrogen-containing plasma produced by collisions with elec- trons is studied on the basis of recently derived cross sections and rate coefficients for the reso- nant vibrational-excitation by electron-impact. The temporal relaxation of the vibrational energy and of the vibrational distribution function is analyzed in a state-to-state approach. The electron and vibrational temperatures are varied in the range [0-50000] K. Conclusions are drawn with respect to the derivation of reduced models and to the accuracy of a relaxation time formalism. An analytical fit of the vibrational relaxation time is given.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.