Plasma temperature measurements using black-body radiation from spectral lines emitted by a capillary discharge

Gregory John Tallents; Sarah Arabella Wilson; Erik Wagenaars; Joseph Francis Branson; Tim Page

doi:10.1016/j.jqsrt.2018.09.005

Plasma temperature measurements using black-body radiation from spectral lines emitted by a capillary discharge

Gregory John Tallents, Sarah Arabella Wilson, Erik Wagenaars, Joseph Francis Branson, Tim Page

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Journal	Journal of Quantitative Spectroscopy and Radiative Transfer
Volume	219
Early online date	6 Sept 2018
DOIs	https://doi.org/10.1016/j.jqsrt.2018.09.005
Publication status	E-pub ahead of print - 6 Sept 2018

Bibliographical note

© 2018 Elsevier Ltd. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

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© 2018 Elsevier Ltd. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
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Cite this

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title = "Plasma temperature measurements using black-body radiation from spectral lines emitted by a capillary discharge",

abstract = "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.",

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T1 - Plasma temperature measurements using black-body radiation from spectral lines emitted by a capillary discharge

AU - Tallents, Gregory John

AU - Wilson, Sarah Arabella

AU - Wagenaars, Erik

AU - Branson, Joseph Francis

AU - Page, Tim

N1 - © 2018 Elsevier Ltd. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2018/9/6

Y1 - 2018/9/6

N2 - 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.

AB - 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.

U2 - 10.1016/j.jqsrt.2018.09.005

DO - 10.1016/j.jqsrt.2018.09.005

M3 - Article

SN - 0022-4073

VL - 219

JO - Journal of Quantitative Spectroscopy and Radiative Transfer

JF - Journal of Quantitative Spectroscopy and Radiative Transfer

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