Accession Number : AD0473996


Title :   ARC DISCHARGE SOURCES


Descriptive Note : Final rept. 15 Oct 1964-15 Nov 1965


Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA


Personal Author(s) : Church, Charles H ; Schlecht, Richard G ; Swanson, Bruce W ; Arnott, Edward F G ; Liberman, Irving


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/473996.pdf


Report Date : 15 Nov 1965


Pagination or Media Count : 178


Abstract : This report summarizes models for the high energy pulsed arc discharge used for high energy laser pumping. Homogeneous temperature models are discussed in which the radiant emission is balanced by the electrical power input. These models have been evaluated at various energy levels for the temperature which has been measured within the arc (assuming local thermal equilibrium). The models included the continuum spectral absorptivity calculated according to Biberman + Norman (using the Zeta factor of Schluter). There was found to be a semi-quantitative agreement between the Zeta factor observed experimentally, and those of Biberman + Norman, and of Schluter. The spectral transmissivity as a function of current density calculated from the models showed reasonable agreement with the experimental values of Emmett, Schawlow, and Weinberg in the visible and the ultraviolet, but differ widely in the infrared (due to the strong infrared lines of xenon). Measurements of the time- resolved profiles of lines in the infrared, of the radial distribution of the spectral radiance in the ultraviolet, and of the electrical conductivity are also discussed. These measurements provide a means for determining the temperature dependence of these quantities within these arcs. The ultraviolet radial profiles indicate that the arc is relatively homogeneous for the range of current densities and pressures studied.


Descriptors :   *ELECTRIC DISCHARGES , *LASERS , ABSORPTION SPECTRA , ARGON , ATOMIC ENERGY LEVELS , BOUNDARY LAYER , COMPUTER PROGRAMMING , ELECTRIC FIELDS , ELECTRICAL CONDUCTIVITY , ELECTRON DENSITY , GAS IONIZATION , KRYPTON , LIGHT PULSES , MATHEMATICAL MODELS , PHYSICAL PROPERTIES , PUMPING(ELECTRONICS) , TEMPERATURE , THERMAL CONDUCTIVITY , XENON


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE