Continuous wave cavity ring-down spectroscopy for velocity distribution measurements in plasma | Zendy

Dustin McCarren | Zendy; Earl Scime | Zendy

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Continuous wave cavity ring-down spectroscopy for velocity distribution measurements in plasma

Author(s) -

Dustin McCarren,

Earl Scime

Publication year - 2015

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.4932313

Subject(s) - plasma , continuous wave , argon , atomic physics , ion , cavity ring down spectroscopy , materials science , plasma diagnostics , spectroscopy , laser , laser induced fluorescence , optics , physics , nuclear physics , quantum mechanics

We report the development of a continuous wave cavity ring-down spectroscopic (CW-CRDS) diagnostic for real-time, in situ measurement of velocity distribution functions of ions and neutral atoms in plasma. This apparatus is less complex than conventional CW-CRDS systems. We provide a detailed description of the CW-CRDS apparatus as well as measurements of argon ions and neutrals in a high-density (10(9) cm(-3) < plasma density <10(13) cm(-3)) plasma. The CW-CRDS measurements are validated through comparison with laser induced fluorescence measurements of the same absorbing states of the ions and neutrals.

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