Radar REMPI diagnostic for low neutral density measurements of xenon in helium buffer gas: Experiments and modeling

Christopher A. Galea, Mikhail N. Shneider, Tat Loon Chng, Arthur Dogariu, Richard B. Miles

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In order to accurately use Radar REMPI as a diagnostic technique, care must be taken to consider how to extrapolate the electron and neutral atom number densities from a given signal. We investigate the dependence of the Radar REMPI signal on the electron collision frequency, specifically in xenon-helium (Xe:He) mixtures, where helium is the buffer gas and the concentration of xenon is 10 ppm or less. We develop a 0-dimensional kinetic model with REMPI ionization to determine the effects of the collision frequency on the signal amplitude and determine a quantitative map between the signal obtained and the neutral xenon density. Good agreement is shown for 1 ppm xenon in atmospheric pressure (∼760 Torr) helium, indicating the importance of modeling the plasma parameters to more accurately assess the signal. An upper bound for the cross-section of two-photon excitation from the ground 5p6 1S0 state to the 5p56p[5/2]2 state of xenon by circularly-polarized light is computed.

Original languageEnglish (US)
Title of host publication2018 Plasmadynamics and Lasers Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105494
DOIs
StatePublished - 2018
Event49th AIAA Plasmadynamics and Lasers Conference, 2018 - Atlanta, United States
Duration: Jun 25 2018Jun 29 2018

Publication series

Name2018 Plasmadynamics and Lasers Conference

Other

Other49th AIAA Plasmadynamics and Lasers Conference, 2018
CountryUnited States
CityAtlanta
Period6/25/186/29/18

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Galea, C. A., Shneider, M. N., Chng, T. L., Dogariu, A., & Miles, R. B. (2018). Radar REMPI diagnostic for low neutral density measurements of xenon in helium buffer gas: Experiments and modeling. In 2018 Plasmadynamics and Lasers Conference [AIAA 2018-3435] (2018 Plasmadynamics and Lasers Conference). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-3435