Experiments in Plasma Initiation and Laser Absorption in Flowing Gases.

Abstract

This report summarizes the preliminary results of experiments designed to characterize the thermal and gasdynamic behavior of laser-sustained plasmas in flowing argon. Calorimetric measurements of global absorption have been made over a range of laser power and pressure. Temperature field mappings yield preliminary estimates of thermal gas energy and radiative losses. An infrared imaging system has been used to study plasma properties as a function of power and flow rate. Spectroscopic and laser-induced fluorescence diagnostic systems, now being installed, are highlighted. Physical implications of the data are discussed, and results of a 2-D heat addition model are presented. Keywords include: Beamed energy propulsion, and Absorption of laser energy in gases.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1985
Accession Number
ADA154303

Entities

People

  • H. Krier
  • J. Mazumder
  • R. J. Glumb
  • T. D. Bender
  • T. J. Rockstroh

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Classification
  • Coefficients
  • Electrons
  • Energy
  • Excimer Lasers
  • Flow Rate
  • Fluid Mechanics
  • Free Electrons
  • Geometry
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Measurement
  • Optics
  • Radiation
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Pulsed Power and Plasma Physics.
  • Spectroscopy.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers