Flash x radiography of laser-accelerated targets

Journal Article · Wed Sep 01 00:00:00 EDT 1982 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.93561· OSTI ID:5195344

Whitlock, R R; Obenschain, S P; Grun, J

Flash x radiography of ablatively accelerated planar foils has provided quantitative measurements and qualitative observations regarding several parameters of critical interest to direct illumination laser fusion. A 1.05-..mu.., 3.3-ns driver beam was focused onto carbon foils in a large (0.7--1-mm diameter) spot to reduce edge effects. From images produced by a backlighting x-ray flash, we have measured overall coupling efficiency, smoothing of laser nonuniformities, target velocity, and ablation pressure. The high velocity targets maintain a localized, high density (>3% of solid). In contrast to other workers' recent measurement of pressure from x-ray imaging, our x-radiographic results, including pressure, are in general agreement with earlier NRL studies. Our results have also provided further insights into double foil interactions and planar target preheat measurements.

• Research Organization: U. S. Naval Research Laboratory, Washington, D. C. 20375
• OSTI ID: 5195344
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 41:5; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

060201* -- Fusion Fuels-- Fabrication & Testing-- (1980-1987)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ACCELERATION
CARBON
DATA
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
IMAGES
INDUSTRIAL RADIOGRAPHY
INFORMATION
LASER FUSION REACTORS
LASER RADIATION
NONMETALS
NUMERICAL DATA
PARAMETRIC ANALYSIS
PRESSURE MEASUREMENT
RADIATION EFFECTS
RADIATIONS
TARGETS
THERMONUCLEAR REACTORS
VELOCITY
X-RAY RADIOGRAPHY