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De-Excitation of Excited States in a Nitrogen Switch After Discharge.
- Source :
-
IEEE Transactions on Plasma Science . Feb2019, Vol. 47 Issue 2, p1372-1377. 6p. - Publication Year :
- 2019
-
Abstract
- The de-excitation of nitrogen excited states after spark gap discharge was investigated with time-resolved optical emission spectroscopy method. Recombination of ionized particles was experimentally proved less than several tens microseconds. After the recombination process, it was shown that atomic nitrogen in ground state [N(4S)] and molecular nitrogen in first excited state [N2($\text{A}^{3} {\Sigma }_{u}^{+}$)] was long-lived particles (metastable state) after gas discharge. Characteristics of decay for N(4S) and [N2($\text{A}^{3} {\Sigma }_{u}^{+}$)] were studied, and their lifetime and decay of density were estimated in this paper. Peculiar unexponential decay of N2($\text{A}^{3} {\Sigma }_{u}^{+}$) showed there was reproduction process of N2($\text{A}^{3} {\Sigma }_{u}^{+}$) after gas discharge. N(4S) could be the source for reproduction process under their mechanism of three-body recombination. Low ionization energy and high ionization collision cross section of N2($\text{A}^{3} {\Sigma }_{u}^{+}$) make it a possible factor limiting the switch recovery. The de-excitation of metastable states opens novel perspectives for understanding the recovery of gas switch. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00933813
- Volume :
- 47
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Plasma Science
- Publication Type :
- Academic Journal
- Accession number :
- 135109212
- Full Text :
- https://doi.org/10.1109/TPS.2018.2884995