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Title: Laser Coupling to Reduced-Scale Targets at the Early Light Program of the National Ignition Facility

A platform for analysis of material properties under extreme conditions, where a sample is bathed in radiation with a high temperature, is under development. This hot environment is produced with a laser by depositing maximum energy into a small, high-Z can. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility, under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, there is a unique wavelength dependence of the Raman backscattered light that is consistent with Brillouin backscatter of Raman forward scatter [A. B. Langdon and D. E. Hinkel, Physical Review Letters 89, 015003 (2002)]. Finally, novel diagnostic capabilities indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light.
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Publication Date:
OSTI Identifier:
15011788
Report Number(s):
UCRL-CONF-208172
TRN: US0501441
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 46th Annual American Physical Society Division of Plasma Physics Meeting, Savannah, GA (US), 11/15/2004--11/19/2004; Other Information: PBD: 18 Nov 2004
Research Org:
Lawrence Livermore National Lab., Livermore, CA (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONSTRUCTION; FREQUENCY DEPENDENCE; LASERS; LAWRENCE LIVERMORE NATIONAL LABORATORY; PHYSICS; PLASMA; POLARIZATION; RADIATIONS; TARGETS; US NATIONAL IGNITION FACILITY