Accession Number : ADA291355

Title :   High Temperature Spectroscopy of Alkali Metal Vapors for Solar to Thermal Energy Conversion.

Descriptive Note : Interim rept. Jun 91-Sep 92,

Corporate Author : PHILLIPS LAB EDWARDS AFB CA

Personal Author(s) : Erdman, Paul S. ; Stwalley, William C.

PDF Url : ADA291355

Report Date : NOV 1994

Pagination or Media Count : 13

Abstract : Solar Plasma propulsion methods proposed by the Air Force have lead to the study of high temperature optical absorption of metal vapors. The Plasma Spectroscopy Cell in the Phillips Laboratory at Edwards AFB CA has been used to obtain an abundance of absorption spectra at temperatures approaching 2000 K and pressures of one atmosphere for lithium and sodium metal vapors. Tentative assignments of molecular transitions are improved upon by use of modern computational techniques for generating intensities of molecular transitions which possibly have been observed. Identification of contributing molecular transitions to overall absorption of radiant energy assists the efforts to develop propulsion methods which rely on the direct absorption of solar energy. jg

Descriptors :   *THERMAL PROPERTIES, *SPECTROSCOPY, *HIGH TEMPERATURE, *ENERGY CONVERSION, *SOLAR ENERGY, *ALKALI METALS, *METAL VAPORS, OPTICAL PROPERTIES, AIR FORCE, SPACECRAFT, COMPUTATIONS, EARTH ORBITS, LOW ORBIT TRAJECTORIES, CELLS, PLASMAS(PHYSICS), INTENSITY, SODIUM, HYDROGEN, LITHIUM, PROPULSION SYSTEMS, RADIATION ABSORPTION, PRESSURE, TRANSITIONS, ABSORPTION SPECTRA, HEAT, MOLECULAR PROPERTIES, ATMOSPHERES, SPECIFIC IMPULSE, ENERGY ABSORBERS.

Subject Categories : Non-electrical Energy Conversion
      Inorganic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE