Detection of Excited States by Laser-Induced Fluorescence.

Abstract

Laser absorption techniques have been developed for the measurement of densities of H2 (C 3 Pi sub u) metastable densities in H2 electrical discharges. Using this technique and a modulated discharge we have found that the metastable density is proportional to discharge current density for current densities up to 10 A/sq cm. By using a pulsed laser to destroy th metastables we have obtained preliminary measurements of the metastable lifetime as a function of H2 density. Keywords: hydrogen, electrons, radiation, excitation coefficient, fluorescence, excited states.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1985
Accession Number
ADA155558

Entities

People

  • Arthur V. Phelps
  • H. Tischer

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Absorption
  • Air Force
  • Current Density
  • Detection
  • Dye Lasers
  • Electric Discharges
  • Electron Density
  • Electrons
  • Laser Induced Fluorescence
  • Lasers
  • Liquid Dye Lasers
  • Measurement
  • Physics
  • Pulsed Lasers
  • Quantum Mechanics
  • Standards
  • Waveforms

Fields of Study

  • Physics

Readers

  • Molecular Photonics/Laser Physics
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Microelectronics