X-ray ablation rates in inertial confinement fusion capsule materials

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3566009· OSTI ID:21537306

Olson, R E; Rochau, G A; Leeper, R J ^[1]; Landen, O L ^[2]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

X-ray ablation rates have been measured in beryllium, copper-doped beryllium, germanium-doped plastic (Ge-doped CH), and diamondlike high density carbon (HDC) for radiation temperatures T in the range of 160-260 eV. In beryllium, the measured ablation rates range from 3 to 12 mg/cm{sup 2}/ns; in Ge-doped CH, the ablation rates range from 2 to 6 mg/cm{sup 2}/ns; and for HDC, the rates range from 2 to 9 mg/cm{sup 2}/ns. The ablation rates follow an approximate T{sup 3} dependence and, for T below 230 eV, the beryllium ablation rates are significantly higher than HDC and Ge-doped CH. The corresponding implied ablation pressures are in the range of 20-160 Mbar, scaling as T{sup 3.5}. The results are found to be well predicted by computational simulations using the physics packages and computational techniques employed in the design of indirect-drive inertial confinement fusion capsules. An iterative rocket model has been developed and used to compare the ablation rate data set to spherical indirect-drive capsule implosion experiments and to confirm the validity of some aspects of proposed full-scale National Ignition Facility ignition capsule designs.

• OSTI ID: 21537306
• Journal Information: Physics of Plasmas, Vol. 18, Issue 3; Other Information: DOI: 10.1063/1.3566009; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABLATION
BERYLLIUM
CAPSULES
COPPER
DOPED MATERIALS
GERMANIUM
INERTIAL CONFINEMENT
ITERATIVE METHODS
THERMONUCLEAR REACTOR MATERIALS
US NATIONAL IGNITION FACILITY
X RADIATION
ALKALINE EARTH METALS
CALCULATION METHODS
CONFINEMENT
CONTAINERS
ELECTROMAGNETIC RADIATION
ELEMENTS
IONIZING RADIATIONS
MATERIALS
METALS
PLASMA CONFINEMENT
RADIATIONS
TRANSITION ELEMENTS