Population Inversion in a Magnetized Expanding Thermal Plasma

A weakly magnetized expanding hydrogen plasma was investigated by means of optical emission spectroscopy. In the tail of the expansion, highly excited H atoms were found, which were responsible for the color change in the jet from red to blue. Several mechanisms that can produce higher excitation st...

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Bibliographic Details
Published inIEEE transactions on plasma science Vol. 36; no. 4; pp. 1028 - 1029
Main Authors Van den Dungen, J., Gabriel, O., Elhamali, H., Schram, D.C., Engeln, R.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2008
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Atom optics
Atomic hydrogen production
Atomic measurements
Color
emission spectroscopy
Excitation
Hydrogen
Hydrogen plasma
hydrogen plasma jet
Magnetic confinement
Magnetism
magnetized plasma jet
Magnetosphere
Optical emission spectroscopy
Optics
Plasma
Plasma confinement
Population inversion
Production
Spectroscopy
Spectrum analysis
Stimulated emission
Thermal expansion
Thermal plasmas
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Summary:A weakly magnetized expanding hydrogen plasma was investigated by means of optical emission spectroscopy. In the tail of the expansion, highly excited H atoms were found, which were responsible for the color change in the jet from red to blue. Several mechanisms that can produce higher excitation states of the H atom were investigated. After determining the production rates of each excited level, the dominant production route of highly excited H atoms was determined to be a mutual H 2 + -H - recombination.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2008.927093