Accession Number : ADA309757

Title :   Interference Diagnosis of Laser Induced Vapor Plume,

Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Yonghua, Yuan ; Changling, Liu

PDF Url : ADA309757

Report Date : APR 1995

Pagination or Media Count : 16

Abstract : Based on plate sheared interference photographs taken of vapor plumes produced by coupling 1.06 micron length pulse Nd:glass laser and LY12 aluminium targets, measurements were made that shock wave speeds in air for t<50 microsec were approximately 473m/s and vapor plume front diffusion speeds were approximately 162m/s. Making use of relevent thermodynamic characteristic equation sets associated with vapor plume plasma, maximum values obtained for ion density, ion temperature, degree of ionicity, and absorption coefficients were, respectively, the results N approx= 3.1 X 10(exp 17)/cc, T approx.= 6096 K, eta approx.= 0.014, alpha at 1.06 microns approx.= 0.03/cm

Descriptors :   *PLASMA DIAGNOSTICS, *LASER TARGET INTERACTIONS, VAPORS, SHOCK WAVES, LASER BEAMS, INTERFERENCE, DIAGNOSIS(GENERAL), TRANSLATIONS, PLUMES, ABSORPTION COEFFICIENTS, CHINA, ION DENSITY, CHINESE LANGUAGE, GLASS LASERS.

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE