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Title
Japanese: 
English:Spectroscopic Characteristics of Supersonically Expanding Nitrogen Arc-Jet Plume—Strong Atomic Lines and Weak Molecular Band Spectra 
Author
Japanese: 赤塚洋, 八町昌彦, 松浦治明.  
English: Hiroshi Akatsuka, Masahiko Hatcho, Haruaki Matsuura.  
Language English 
Journal/Book name
Japanese: 
English:IEEE T PLASMA SCI 
Volume, Number, Page Vol. 42    No. 12    pp. 3691-3697
Published date Dec. 8, 2014 
Publisher
Japanese: 
English:IEEE 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6851165
 
DOI https://doi.org/10.1109/TPS.2014.2330840
Abstract We generate recombining nitrogen plasma plume by expansion of nitrogen arc into lower pressure vessel with a weak longitudinal magnetic field in a steady state. Spectroscopic observation reveals that the plasma has almost no component of molecular band spectra. Meanwhile, atomic nitrogen lines are observed with considerable intensity. The reason for this spectroscopic peculiarity is discussed in terms of chemical thermodynamics of the nitrogen thermal arc plasma and of nonequilibrium characteristics.

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