2D laser-collision induced fluorescence in low-pressure argon discharges

Barnat, E. V.; Weatherford, B. R.

doi:10.1088/0963-0252/24/5/055024

2D laser-collision induced fluorescence in low-pressure argon discharges

Journal Article · Fri Sep 25 00:00:00 EDT 2015 · Plasma Sources Science and Technology

DOI:https://doi.org/10.1088/0963-0252/24/5/055024· OSTI ID:1237650

Barnat, E. V. ^[1]; Weatherford, B. R. ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
L-3 Communications, San Carlos, CA (United States)

Development and application of laser-collision induced fluorescence (LCIF) diagnostic technique is presented for the use of interrogating argon plasma discharges. Key atomic states of argon utilized for the LCIF method are identified. A simplified two-state collisional radiative model is then used to establish scaling relations between the LCIF, electron density, and reduced electric fields (E/N). The procedure used to generate, detect and calibrate the LCIF in controlled plasma environments is discussed in detail. LCIF emanating from an argon discharge is then presented for electron densities spanning 10⁹ e cm^–3 to 10¹² e cm^–3 and reduced electric fields spanning 0.1 Td to 40 Td. Lastly, application of the LCIF technique for measuring the spatial distribution of both electron densities and reduced electric field is demonstrated.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC04-94AL85000; SC0001939

OSTI ID:: 1237650

Alternate ID(s):: OSTI ID: 1238982
OSTI ID: 22549475

Report Number(s):: SAND--2015-3440J; 583601

Journal Information:: Plasma Sources Science and Technology, Journal Name: Plasma Sources Science and Technology Journal Issue: 5 Vol. 24; ISSN 0963-0252

Country of Publication:: United States

Language:: English

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