National Ignition Facility targets, especially those made with material such as beryllium through which hydrogen doesn`t permeate, may be made in sections and pieced together. Tolerances, chamfers, glue joints and fill tubes will form density mismatches which may lead to asymmetries in the capsule implosion. Such defects or perturbations also form non-linear initial conditions of interest for ...
Energy Citations Database
In recently developed laser-driven shockless compression experiments an ablatively driven shock in a primary target is transformed into a ramp compression wave in a secondary target via unloading followed by stagnation across an intermediate vacuum gap. Current limitations on the achievable peak pressures are ...
When a shock wave reflects from a free surface a region of hydrostatic tension of sufficient magnitude may form causing voids to nucleate and grow which often leads to failure of the material (termed spall). We have conducted the first time resolved in-situ small angle x-ray scattering (SAXS) measurements of shock-loaded metal at the ...
NASA Astrophysics Data System (ADS)
Lanthanides are fascinating metals to study because they exhibit physical properties that vary with 4f occupancy. Specifically Gadolinium is interesting because there are multiple structural phase transitions accessible below 100 GPa. Experiments were performed on Gadolinium metal in which shock waves were driven in Gadolinium foils through direct laser ...
A new technique for time-resolved measurement of Hohlraum radiation temperature has been successfully tested in Hohlraums with radiation temperatures in the range of 90-170 eV. In these experiments, Hohlraum radiation fields produced ablatively driven shock waves in quartz samples. A line-imaging velocity ...
... Descriptors : , (*SHOCK WAVES, VALVES), (*VALVES, SHOCK WAVES), SHOCK TUBES, INSTRUMENTATION, HIGH PRESSURE VALVES. ...
DTIC Science & Technology
... Shock Waves and Shock Loading. * Shock and Dynamic Phenomena in Ceramics. ... J. SHOCK WAVES AND SHOCK LOADING ...
... presented. Descriptors : *SHOCK WAVES, SHOCK TUBES, OXIDES, NITROGEN, RELAXATION TIME, ADSORPTION. ...
... Descriptors : (*AIRBURST, SHOCK WAVES), (*SHOCK WAVES, PROPAGATION), (*UPPER ATMOSPHERE, SHOCK WAVES), VACUUM, GAS ...
... THE INTERACTION OF A SHOCK WAVE IN A PLASTIC MEDIUM WITH AN EDIFICE by ... THE INTERACTION OF A SHOCK WAVE IN A PLASTIC ...
... Descriptors : (*UNDERWATER EXPLOSIONS, SHOCK WAVES), (*SHOCK WAVES, REFLECTION), PENTOLITE, INTERACTIONS, SPHERES ...
... Descriptors : (*UNDERWATER EXPLOSIONS, SHOCK WAVES), (*SHOCK WAVES, ENERGY), IRREVERSIBLE PROCESSES, PRESSURE ...
... Descriptors : *ROCK, *PETROLOGY, SHOCK WAVES, SHOCK WAVES, ROCK, METEORITES, VOLCANOES, DENSITY. ...
The phenomenon of irregular shock-wave reflection is of importance in high-temperature gas dynamics, astrophysics, inertial-confinement fusion, and related fields of high-energy-density science. However, most experimental studies of irregular reflection have used supersonic wind tunnels or shock tubes, and few or no data are available for Mach reflection ...
An experiment designed to launch laser-ablation-driven shock waves (10 to 70 Mbar) in a planar liquid-deuterium target on the OMEGA Laser System and to diagnose the shocked conditions using inelastic x-ray scattering is described. The electron temperature (Te) is inferred from the Doppler-broadened ...
A spatially planar ({delta}time/time{approx}0.2%) longitudinal stress drive extending over millimeter scale lengths is used to shocklessly compress an aluminum sample to a peak stress of 210 GPa over nanosecond time scales. Direct laser irradiation onto the inner wall of an Au halfraum creates an x ray distribution with a near-uniform blackbody temperature of up to 137 eV. The x rays ablate ...
A spatially-planar ({Delta}time/time {approx} 0.2%) longitudinal stress drive extending over millimeter scale lengths is used to shocklessly compress an aluminum sample to a peak stress of 210 GPa over nanosecond timescales. Direct laser irradiation onto the inner wall of an Au halfraum creates an x ray distribution with a near-uniform blackbody temperature of up to 137eV. The x rays ablate ...
DOE Information Bridge
... (Author). Descriptors : (*NICKEL ALLOYS, SHOCK WAVES), (*TITANIUM ALLOYS, SHOCK WAVES), (*SHOCK WAVES, *PHASE STUDIES ...
... 1724 OVERPRESSURES AND DURATIONS OF SHOCK WAVES EMERGING FROM OPEN-ENDED SHOCK TUBES by ... Shock waves ...
Contents: What is gas dynamics, (sound waves, the appearance of an abrupt change, conditions at shock wave discontinuity, limiting compression in shock waves, weak shock waves, structure of front of shock wave); ...
National Technical Information Service (NTIS)
... INO NO. IACCESSION NO ShockE( Waves and Shock Tubes ... Shock Waves and Shock Tubes Berkeley, California, July 28-August 2, -1985 ~ C2 ...
A new technique for time-resolved measurement of hohlraum radiation temperature has been successfully tested in hohlraums with radiation temperatures in the range of 90-170 eV. In these experiments, the hohlraum radiation fields produced ablatively-driven shock waves in quartz samples. A line-imaging velocity interferometer [1] (VISAR) ...
... literature. (Author). Descriptors : *SHOCK TUBES, *MECHANICAL WAVES, SHOCK WAVES, THEORY. Subject Categories ...
... EQUATIONS OF STATE, EXPLOSIVES INITIATORS), (*EXPLOSIVES INITIATORS, SHOCK WAVES), (*SHOCK WAVES, EXPLOSIVES INITIATORS ...
... Descriptors : (*ROCKET PROPELLANT GRAINS, SHOCK WAVES), (*SHOCK WAVES, PROPAGATION), VISCOELASTICITY, BIREFRINGENCE ...
... detonation waves, limits of detonation ... of condensed substances, nuclear detonation). ... FLUID DYNAMICS), (*DETONATIONS, SHOCK WAVES ...
... Simulation of a turbulent boundary layer behind a shock // Current Topics in Shock Waves: Proc. ... on Shock Waves and Shock Tubes / Ed. Kim. ...
... Shock Waves and Shock Tubes, San Francisco, California, USA, 1985. ... on Shock Waves and Shock Tubes, San Francisco. California, USA, ...
... Descriptors : (*AIRBURST, SHOCK WAVES), (*SHOCK WAVES, UNDERWATER), (*ACOUSTICS, UNDERWATER), EXPLOSION EFFECTS, ...
... Theory of Vorticity Generation by Shock Wave ... Examples of this phenomenon include sound waves or shocks passing through ...
... strength shock waves generated by the sharp fin to explore the premise that the ... and orientation shock wave traced on the floor. ...
... (Author). Descriptors : (*AIR, SHOCK WAVES), (*SHOCK WAVES, REACTION KINETICS), (*NITROGEN, EXCITATION), CHEMICAL BONDS ...
... 1 ~ "THE SHOCK WAVE PRODUCED BY ... REFERENCES 1. Courant, R. and Friedrichs, K. 0.; Supersonic Flow and Shock Waves, ...
... Shock wave forms were observed to be uniquely characteristic of the medium through which shock wave transmission occurred. ...
Page 1. ( I SHOCK WAVES AND THE ORIGIN OF LIFE by ... I YPE OF REPORT & PERIOD COVERED SHOCK WAVES AND THE ORIGIN OF LIFE ...
... Pagination or Media Count : 16. Descriptors : (*SOILS, SHOCK WAVES), (*SHOCK WAVES, PROPAGATION), NUMERICAL ANALYSIS, USSR. ...
... ON THE INTERACTION BETWEEN THE SHOCK WAVE ... to the interaction between shock waves and boundary-layer instabilities, although most ...
... Descriptors : , (*FALLOUT SHELTERS, EXPLOSION EFFECTS), (*DUCTS, SHOCK WAVES), (*SHOCK WAVES, ATTENUATION), MEASUREMENT ...
... the thickness and internal structure of shock waves. ... measurements of the internal structure of shock waves were carried out by ...
... Descriptors : *PLASMAS(PHYSICS), *PINCH EFFECT, SHOCK WAVES, SHOCK WAVES, MAGNETOHYDRODYNAMICS, ELECTRON DENSITY ...
... Descriptors : (*SHOCK WAVES, GAS FLOW), (*DETONATION WAVES, SHOCK TUBES), MATHEMATICAL ANALYSIS, IGNITION, COMBUSTION ...
... THESIS E EXERGY DECREASE IN SHOCK WAVES AND BOUNDARY LAYERS OF SPACE LAUNCH VEHICLES by ... shock wave is encountered. ...
... (Author). Descriptors : (*SOLID STATE PHYSICS, SHOCK WAVES), (*SHOCK WAVES, SOLID STATE PHYSICS), (*MECHANICS, SHOCK WAVES ...
... Descriptors : (*CURVED PROFILES, SHOCK WAVES), (*SHOCK WAVES, DIFFRACTION), COMPRESSIBLE FLOW, FLOW VISUALIZATION ...
