Ultraviolet Rayleigh Scatter Imaging for Spatial Temperature Profiles in Atmospheric Microdischarges

Abstract

Spatially resolved temperature measurements within a microdischarge in atmospheric pressure air have been conducted using Rayleigh scattering of a pulsed ultraviolet laser. Scattering intensity images were used to generate a radial profile of translational temperature, with the analysis based on the ideal gas inverse relationship of temperature and gas density. Rayleigh scattering results were compared to standard optical emission spectral analyses of N2 second positive system bands, where the calculated rotational temperatures from emission were in reasonable agreement with the Rayleigh translational temperature profiles.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2014
Accession Number
ADA611191

Entities

People

  • James E. Caplinger
  • Steven Adams

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Barometric Pressure
  • Detectors
  • Electromagnetic Radiation
  • Electromagnetic Scattering
  • Electrons
  • Emission
  • Glow Discharges
  • Ionization
  • Measurement
  • Radiation
  • Rayleigh Scattering
  • Scattering
  • Scattering Cross Sections
  • Spectroscopy
  • Ultraviolet Lasers

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers