Abstract
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 language | English |
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Pages (from-to) | 1487-1489 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 85(9) |
Issue number | 9 |
DOIs | |
Publication status | Published - 30 Aug 2004 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)