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- W2027396137 abstract "Summary form only given. The analysis of continuum emission radiation as a plasma diagnostic has primarily been employed for high-pressure arcs and inductively-coupled plasma torches in or near thermal equilibrium. Due to the high ionization fractions in such plasmas, the continuum spectrum is dominated by photons emitted from recombining electrons and ions <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sup> . Under typical microplasma conditions of ionization fractions less than 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-4</sup> and electron temperatures on the order of 1 eV, however, the continuum spectrum consists primarily of Bremsstrahlung resulting from electron-neutral collisions. Spatial variations in continuum emission intensity in microplasmas can be directly correlated with line-of-sight electron densities. We verify this relationship by examining a microplasma using multiple electron density diagnostics. We present direct comparisons of relative continuum emission intensities with spatially-resolved electron densities from Stark broadening <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> as well as lumped electron densities from estimations of the plasma electrical impedance for a range of discharge conditions. All measurements are made for a single filamentary microplasma generated in high-pressure argon using a microstrip resonator design. Once an absolute calibration is made, the continuum radiation technique allows estimation of the electron density with lower noise in a wider range of plasma conditions than Stark broadening. The dependence of continuum radiation on the electron temperature is also considered." @default.
- W2027396137 created "2016-06-24" @default.
- W2027396137 creator A5028039804 @default.
- W2027396137 date "2014-05-01" @default.
- W2027396137 modified "2023-09-23" @default.
- W2027396137 title "Continuum radiation as an electron density diagnostic in microwave-generated microplasmas" @default.
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- W2027396137 doi "https://doi.org/10.1109/plasma.2014.7012500" @default.
- W2027396137 hasPublicationYear "2014" @default.
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