Accession Number : ADA140995

Title :   Experimental and Theoretical Studies of Laser Propulsion Phenomenology.

Descriptive Note : Annual technical rept. 15 Jan 83-29 Feb 84,

Corporate Author : PHYSICAL SCIENCES INC ANDOVER MA

Personal Author(s) : Rosen,D. ; Weyl,G. ; Kemp,N. ; Ham,D.

Report Date : MAR 1984

Pagination or Media Count : 22

Abstract : This report summarizes progress on a research program carried out to investigate and define physical process important to the operation of pulsed and CW laser-heated thrusters. The work performed in this first year effort was divided into three tasks: (1) experimental measurements and quantum kinetic model calculations of the thresholds for laser-induced gas breakdown at visible and near UV wavelengths, (2) preliminary calculations of the spectral/radiant emissions from high temperature (T = 10,000 to 40,000 K), high pressure (P approx. 1 to 100 atm) plasmas of hydrogen and nitrogen, and (3) experimental measurements of the high temperature absorption properties of potential molecular seedants for a CW laser-heated thruster operating at lambda approx. 10 microns. The molecular absorption measurements were performed using a low power, line-tuneable C02 probe laser and a shock tube heating apparatus. (Author)

Descriptors :   *Laser applications, *Propulsion systems, *Thrusters, *Rocket engines, Laser beams, Pulsed lasers, Continuous wave lasers, Heating, Gas breakdown, Plasmas(Physics), Visible spectra, Ultraviolet spectra, Emission spectra, Hydrogen, Nitrogen, Molecules, Absorption, Measurement, Mathematical analysis, Quantum statistics, Kinetic energy, Energy conversion, High temperature

Subject Categories : Lasers and Masers
      Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE