DEVELOPMENT OF A TWO-COLOR THOMSON AND RAYLEIGH SCATTERING DIAGNOSTIC FOR ELECTRON DENSITY MEASUREMENTS Conference Paper

abstract

• In many weakly ionized plasmas, the application of light scattering diagnostics requires consideration of both Thomson (electron) and Rayleigh (ion, neutral and molecular) scattering processes. This study develops and demonstrates a two-color light scattering diagnostic which differentiates between the Rayleigh and Thomson scattering processes by wavelength, thereby permitting simultaneous measurement of electron and neutral/ion density without the use of a spectrometer. Unlike path-integrated diagnostics, this approach yields a spatially resolved (point) measurement of electron density. Based on a theoretical analysis of the two-color scattering diagnostic, it is found that the Thomson scattering total spectral density function can limit measurement accuracy in the coherent scattering regime. Several experimental and analytical approaches to mitigating this issue are presented.

name of conference

• 2017 IEEE International Conference on Plasma Science (ICOPS)

authors

• Limbach, Christopher

published proceedings

• 2017 IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)

author list (cited authors)

• Limbach, C. M.

complete list of authors

• Limbach, Christopher M

publication date

• January 2017

published in

• 2017 IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)  Journal

keywords

• Coherent Scattering Regime
• Density Functional Theory
• Density Measurement
• Electron Density
• Electron Density Measurements
• Light Scattering
• Light Scattering Diagnostics
• Neutral/ion Density
• Path-integrated Diagnostics
• Plasma Density
• Plasma Diagnostics
• Plasma Light Propagation
• Plasma Measurements
• Plasmas
• Rayleigh Scattering
• Thomson Effect
• Total Spectral Density Function
• Two-color Light Scattering
• Two-color Rayleigh Scattering
• Two-color Thomson Scattering
• Wavelength Measurement
• Weakly Ionized Plasmas

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