Title :
Blast Wave Experiments at Z
Author :
Tierney, T.E. ; Watt, Robert G. ; Idzorek, George ; Peterson, Darrell L. ; Peterson, Robert R. ; Tierney, H.E. ; Lopez, Mike R. ; Jones, Michael
Author_Institution :
Los Alamos Nat. Lab., Los Alamos
Abstract :
Summary form only given. Blast waves (BWs) occur when the wave speed of an initially diffusive, supersonic radiation wave becomes subsonic and forms a hydrodynamic shock wave, which is radiographically visible. BWs are a novel diagnostic in radiation-flow, code-validation experiments that use Sandia´s Z-accelerator´s dynamic hohlraum (DH) as a radiative source. The physics models being tested are sensitive to delivered energy and power changes of les10%; therefore, precise in-situ radiative power and energy measurements are required for quantitative comparisons between simulation and experiment. The energy-sensitive BW diagnostic complements bolometric and x-ray radiometric diagnostics in providing these measurements. Recent comparisons between BW qualification experiments and simulations have revealed a spatial dependence on the radiation source. We discuss the experimental design and sensitivities for the BW diagnostic and experimental results in comparison to simulations and other diagnostics.
Keywords :
detonation waves; plasma accelerators; plasma diagnostics; plasma flow; X-ray radiometric diagnostics; Z-accelerator dynamic hohlraum; blast wave experiment; bolometric diagnostics; code validation experiment; hydrodynamic shock wave; in-situ radiative power measurement; radiation-flow diagnostic; radiative source; supersonic radiation wave; DH-HEMTs; Design for experiments; Diagnostic radiography; Energy measurement; Hydrodynamics; Physics; Qualifications; Radiometry; Shock waves; Testing;
Conference_Titel :
Plasma Science, 2007. ICOPS 2007. IEEE 34th International Conference on
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0915-0
DOI :
10.1109/PPPS.2007.4346303