Plasma temperature measurements using black-body radiation from spectral lines emitted by a capillary discharge
| Autor: | Erik Wagenaars, G.J. Tallents, T. Page, Sarah Wilson, J. Branson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Radiation
Materials science genetic structures Opacity Plasma parameters business.industry Plasma 01 natural sciences Temperature measurement Atomic and Molecular Physics and Optics Spectral line 010309 optics Wavelength Optics Physics::Plasma Physics Capillary Plasma 0103 physical sciences Black-body radiation sense organs 010306 general physics business Spectroscopy |
| Zdroj: | Journal of Quantitative Spectroscopy and Radiative Transfer |
| ISSN: | 0022-4073 |
| Popis: | Optically thick spectral line emssion from plasmas is often difficult to use for the diagnosis of plasma parameters. We demonstrate a technique for temperature measurement using the peak intensity of optically thick lines as their intensities approach a black-body distribution. Recording optical emission in the wavelength range 300–1000 nm from a plasma formed by radio-frequency heating and electrical discharges in a 0.2 m long capillary plasma, we show that the high wavelength Rayleigh-Jeans form of the black-body emission can be fitted to the most intense spectral lines to give a measurement of plasma temperatures in the 1–1.5 eV range. The temperature measurement technique should have wider applicability in diagnosing plasmas with optically thick spectral lines. |
| Databáze: | OpenAIRE |
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