학술논문
Radiochemical determination of Inertial Confinement Fusion capsule compression at the National Ignition Facility.
Document Type
Article
Author
Source
Subject
*RADIOCHEMICAL analysis
*ISOTOPES
*GOLD
*NEUTRONS
*FUEL
*ABLATIVE materials
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*
*
*
*
Language
ISSN
0034-6748
Abstract
We describe a radiochemical measurement of the ratio of isotope concentrations produced in a gold hohlraum surrounding an Inertial Confinement Fusion capsule at the National Ignition Facility (NIF). We relate the ratio of the concentrations of (n,γ) and (n,2n) products in the gold hohlraum matrix to the down-scatter of neutrons in the compressed fuel and, consequently, to the fuel's areal density. The observed ratio of the concentrations of 198m+gAu and 196gAu is a performance signature of ablator areal density and the fuel assembly confinement time. We identify the measurement of nuclear cross sections of astrophysical importance as a potential application of the neutrons generated at the NIF. [ABSTRACT FROM AUTHOR]