Collapsing radiative shock measurements in xenon on the omega laser
| Autor: | J. P. Knauer, D. D. Ryutov, D.J. Kremer, A.B. Reighard, L. Boireau, M.R. Taylor, K.L. Killebrew, S. G. Glendinning, R. J. Wallace, D. C. Marion, S. Bouquet, T. R. Boehly, Bruce Remington, R. P. Drake, M. Koenig, Christine Krauland, Michael Grosskopf, T. Donajkowski, J. A. Greenough |
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| Rok vydání: | 2006 |
| Předmět: |
Physics
Laser ablation Astrophysics::High Energy Astrophysical Phenomena chemistry.chemical_element Astrophysics Moving shock Shock (mechanics) Computational physics Shock waves in astrophysics Xenon chemistry Optical depth (astrophysics) Radiative transfer Plasma diagnostics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The 33rd IEEE International Conference on Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts.. |
| Popis: | Summary form only given. Radiative shocks occur in many high-energy density explosions, but prove difficult to create in laboratory experiments or to fully model with astrophysical codes. Here we describe an experiment significant to astrophysical shocks, which produces a driven, quasi-planar radiative shock in xenon gas at 6 mg/cc. A thin, low-Z disk is driven into a cylindrical volume of xenon gas via laser ablation pressure. This impact creates a shock in xenon, after which the disk travels behind the shock providing a continuing pressure source. With average shock speeds above 100 km/sec, this shock can radiate away energy just behind the shock front, creating a thin layer of dense xenon. Simulations suggest this material is compressed an order of magnitude more than strong shock relations would predict. X-ray backlighting techniques have yielded images of a collapsed shock compressed to |
| Databáze: | OpenAIRE |
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