Continuous Emission, Lowering of the Ionization Potential and Total Excitation Cross-Sections of an Atmospheric Thermal Plasma

Abstract.We have determined the characteristic quantities (the electron temperature and the electron density) of an argon plasma in a cascade arc (diameter of 2 and 4 mm) for a pressure range of 1 x 105-8 x IO5 Pa and a current range of 20-70 A. The absolute continuum intensity was also determined in the wavelength ranges from 250-320 nm and 380-800 nm for pressures of 2, 4 and 6 bar and 20, 40 and 60 A in the case of a 2 mm arc. The plasma is close to local thermal equilibrium (LTE). Using the mentioned quantities, prediction of the absolute intensity as a function of the wavelength is possible from 140 nm to the infrared within 10%.The use of the arc as a light source in photon induced chemical vapour deposition, spectroscopic ellipsometry and infrared absorption spectroscopy is discussed.

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Characteristic quantities of a cascade arc used as a light source for spectroscopic techniques

Wilbers

Kroesen

Timmermans

et al. 1990

Meas. Sci. Technol.

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Non-ideal plasma behavior of railgun arcs

Thio

Frost

1986

IEEE Trans. Magn.

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Continuous Emission, Lowering of the Ionization Potential and Total Excitation Cross-Sections of an Atmospheric Thermal Plasma

Abstract: . (1979). Continuous emission, lowering of the ionization potential and total excitation cross-sections of an atmospheric thermal plasma. Journal de Physique. Colloque, 40(C7), 285-286.

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Characteristic quantities of a cascade arc used as a light source for spectroscopic techniques

Characteristic quantities of a cascade arc used as a light source for spectroscopic techniques

Non-ideal plasma behavior of railgun arcs

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