TY - GEN
T1 - Kinetics of excited species at high specific energy deposition
T2 - 54th AIAA Aerospace Sciences Meeting, 2016
AU - Lepikhin, Nikita D.
AU - Klochko, Andrei V.
AU - Popov, Nikolay A.
AU - Starikovskaia, Svetlana M.
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Depopulation of electronically excited nitrogen state, N2(C3Пu,v’ = 0), in the afterglow of capillary nanosecond pulsed discharge in pure nitrogen is studied. It is found experimentally that an additional collisional mechanism appears and dominates at high specific deposited energies leading to the anomalously fast deactivation of the N2(C3Пu). On the basis of obtained experimental data and of the analysis of possible quenching agents, it is concluded that the anomalously fast deactivation of the N2(C3Пu) can be explained by the quenching by electrons. Long-lived plasma at time scale of hundreds nanoseconds after the end of the pulse is observed. High electron densities, about 1014cm–3at 27 mbar, are sustained by a reaction of associative ionization. Kinetic 1. D numerical modeling and comparison of calculated results with experimentally measured electric fields in the discharge and electron density measurements in the afterglow confirm the validity of the suggested mechanism.
AB - Depopulation of electronically excited nitrogen state, N2(C3Пu,v’ = 0), in the afterglow of capillary nanosecond pulsed discharge in pure nitrogen is studied. It is found experimentally that an additional collisional mechanism appears and dominates at high specific deposited energies leading to the anomalously fast deactivation of the N2(C3Пu). On the basis of obtained experimental data and of the analysis of possible quenching agents, it is concluded that the anomalously fast deactivation of the N2(C3Пu) can be explained by the quenching by electrons. Long-lived plasma at time scale of hundreds nanoseconds after the end of the pulse is observed. High electron densities, about 1014cm–3at 27 mbar, are sustained by a reaction of associative ionization. Kinetic 1. D numerical modeling and comparison of calculated results with experimentally measured electric fields in the discharge and electron density measurements in the afterglow confirm the validity of the suggested mechanism.
UR - https://www.scopus.com/pages/publications/85007480747
U2 - 10.2514/6.2016-1213
DO - 10.2514/6.2016-1213
M3 - Conference contribution
AN - SCOPUS:85007480747
SN - 9781624103933
T3 - 54th AIAA Aerospace Sciences Meeting
BT - 54th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
Y2 - 4 January 2016 through 8 January 2016
ER -