Accession Number : ADA326339

Title :   The Study of Shock Launching in Silicon by Pulsed X-Ray Diffraction.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Wark, J. S. ; Whitlock, R. R. ; Hauer, A. ; Swain, J. E. ; Solone, P. J.

PDF Url : ADA326339

Report Date : 24 MAR 1987

Pagination or Media Count : 11

Abstract : Multikilobar shocks were launched into a single crystal of (111) silicon overcoated with 1000 A aluminum and a 25 micron transparent plastic layer by irradiation with a 1 nsec pulse of 1.06 microcron laser light at 0.8-8 J cm(exp -2). Peak lattice compressions (densities) were directly measured and shocked lattice stresses inferred as a function of irradiance and time by Bragg diffracting a short (<100 psec) burst of probing x-rays through the shock launching region. Compressions of up to ^4% were measured, corresponding to stresses of order 70 Kbar, at irradiances of ^4 x 10(exp 9) W cm(exp -2).

Descriptors :   *X RAY DIFFRACTION, *SHOCK(MECHANICS), *STRAIN(MECHANICS), *LASER BEAMS, *SILICON, SINGLE CRYSTALS, PULSED LASERS, ALUMINUM, LAUNCHING, IRRADIATION, HUGONIOT EQUATIONS, BRAGG ANGLE.

Subject Categories : Lasers and Masers
      Nuclear Physics & Elementary Particle Physics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE