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Title: TIME- AND SPACE-RESOLVED OPTICAL PROBING OF THE SHOCK RISE TIME IN THIN ALUMINUM FILMS

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
785437
Report Number(s):
LA-UR-99-3274
TRN: AH200137%%52
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jul 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; PULSE RISE TIME; THIN FILMS; SPATIAL RESOLUTION; TIME RESOLUTION

Citation Formats

D. S. MOORE, K. T. GAHAGAN, and ET AL. TIME- AND SPACE-RESOLVED OPTICAL PROBING OF THE SHOCK RISE TIME IN THIN ALUMINUM FILMS. United States: N. p., 1999. Web.
D. S. MOORE, K. T. GAHAGAN, & ET AL. TIME- AND SPACE-RESOLVED OPTICAL PROBING OF THE SHOCK RISE TIME IN THIN ALUMINUM FILMS. United States.
D. S. MOORE, K. T. GAHAGAN, and ET AL. 1999. "TIME- AND SPACE-RESOLVED OPTICAL PROBING OF THE SHOCK RISE TIME IN THIN ALUMINUM FILMS". United States. doi:. https://www.osti.gov/servlets/purl/785437.
@article{osti_785437,
title = {TIME- AND SPACE-RESOLVED OPTICAL PROBING OF THE SHOCK RISE TIME IN THIN ALUMINUM FILMS},
author = {D. S. MOORE and K. T. GAHAGAN and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 7
}

Conference:
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  • We present the first measurements of particle velocity histories at the interface between an aluminum sample shocked by a 120fs laser-driven pressure pulse and a fused silica window. Frequency-domain interferometry is used to provide space- and time-resolved measurements of the phase shift of a pair of probe pulses backscattered at the shocked interface. Pressures of 1{endash}3 Mbar are inferred from the simultaneous measurement of the particle and shock velocities along the aluminum Hugoniot curve for {approximately}10{sup 14} W/cm{sup 2} laser irradiances. {copyright} {ital 1996 The American Physical Society.}
  • Time-resolved radiation pyrometry has been used to study materials which undergo solid-state chemical reactions due to shock loading. Shock-induced chemical reactivity in solids is fundamentally different than that in high explosives and other energetic materials because if no volatiles are present the reaction products end up in the condensed, rather than the vapor, state. Bulk property changes accompanying the solid-state reactions may therefore be too small to be observable with wave profile or shock-velocity measurements. However, some solid-state reactions, such as that between metallic nickel and aluminum, are exothermic enough to give rise to a measurable increase in temperature, somore » pyrometry can be used to detect the reactions. Unfortunately, these measurements are complicated by the large temperature increases generated by other sources. Possible mechanims for generation of these high temperatures, and their effect on the chemical reaction, are suggested.« less
  • We discuss the application of ultrafast time-resolved two-dimensional interferometric microscopy to the measurement of shock wave breakout from thin metal films. This technique allows the construction of a two-dimenisional breakout profile for laser generated impulsive shocks with temporal resolution of< 300 fs and out-of-plane spatial resolution of 1.5 nm using 130 fs, 800 nm probe pulses. Constraints placed on the spatial extent of the probe region and on the spatial resolution of'the technique by the short duration of the probe pulses will be discussed. In combination with other techniques, such as spectral interferometry, this technique provides a powerful means ofmore » investigating shock dynamics in a variety of materials.« less
  • Abstract not provided.