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Title: Imaging shocked sapphire at 200-460 KBAR: the effect of crystal orientation on optical emission

Abstract

We have taken 12--50 ns exposure duration images of 200--460 kbar shock loaded, single crystal sapphire (Al{sub 2}O{sub 3}) windows of the c-cut (0001), r-cut (1,-1,0,2) and a-cut (1,1,-2,0) orientations. We find that the spectra of the emission are broad and relatively featureless, extending at least from 760 to 280 nm. Images of this emission at the lower end of the stress range (200--220 kbar) show that it is spatially very heterogeneous, coming from a few seemingly-randomly distributed locations within the crystal. This emission heterogeneity becomes more fine-grained with increasing shock stress. Finally, the r-cut orientation produces significantly less emission than the other two orientations at the same stress.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
12725
Report Number(s):
UCRL-JC-135520; DP0102012
Journal ID: ISSN 0094-243X; DP0102012; TRN: AH200120%%468
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 505; Conference: American Physical Society 11th Topical Conference on Shock Compression of Condensed Matter, Snowbird, UT (US), 06/27/1999--07/02/1999; Other Information: PBD: 25 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPRESSION; MONOCRYSTALS; ORIENTATION; SAPPHIRE; SPECTRA; WINDOWS

Citation Formats

Hare, D E, Holmes, N C, and Webb, D J. Imaging shocked sapphire at 200-460 KBAR: the effect of crystal orientation on optical emission. United States: N. p., 1999. Web. doi:10.1063/1.1303554.
Hare, D E, Holmes, N C, & Webb, D J. Imaging shocked sapphire at 200-460 KBAR: the effect of crystal orientation on optical emission. United States. doi:10.1063/1.1303554.
Hare, D E, Holmes, N C, and Webb, D J. Wed . "Imaging shocked sapphire at 200-460 KBAR: the effect of crystal orientation on optical emission". United States. doi:10.1063/1.1303554. https://www.osti.gov/servlets/purl/12725.
@article{osti_12725,
title = {Imaging shocked sapphire at 200-460 KBAR: the effect of crystal orientation on optical emission},
author = {Hare, D E and Holmes, N C and Webb, D J},
abstractNote = {We have taken 12--50 ns exposure duration images of 200--460 kbar shock loaded, single crystal sapphire (Al{sub 2}O{sub 3}) windows of the c-cut (0001), r-cut (1,-1,0,2) and a-cut (1,1,-2,0) orientations. We find that the spectra of the emission are broad and relatively featureless, extending at least from 760 to 280 nm. Images of this emission at the lower end of the stress range (200--220 kbar) show that it is spatially very heterogeneous, coming from a few seemingly-randomly distributed locations within the crystal. This emission heterogeneity becomes more fine-grained with increasing shock stress. Finally, the r-cut orientation produces significantly less emission than the other two orientations at the same stress.},
doi = {10.1063/1.1303554},
journal = {},
issn = {0094-243X},
number = ,
volume = 505,
place = {United States},
year = {1999},
month = {8}
}

Conference:
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