Measurements of helium metastable density in an atmospheric pressure glow discharge

Gagik Nersisyan, Thomas Morrow, William Graham

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


The density of metastable helium atoms in a dielectric barrier discharge operating in helium with some impurities present has been measured using laser-collisional-induced fluorescence and absorption techniques. Time-resolved measurements indicate that helium metastables contribute to the production of impurity ions, in this case N-2(+), in the postdischarge current phase of a glow discharge. In our particular discharge environment, the helium metastable density is (1.5+/-1.4)x10(10) cm(-3), a result consistent with failure to observe absorption by metastables in a multipass absorption measurement. (C) 2004 American Institute of Physics.
Original languageEnglish
Pages (from-to)1487-1489
Number of pages3
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 30 Aug 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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