Radiative shocks: New results for laboratory astrophysics
| Autor: | Stefano Atzeni, Alessandra Ravasio, Angelo Schiavi, C. Michaut, Tommaso Vinci, M. Koenig, S. Bouquet, Norimasa Ozaki, Alessandra Benuzzi-Mounaix, Olivier Peyrusse, L. Boireau |
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| Přispěvatelé: | Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Dipartimento di Energetica, Università di Roma La Sapienza and CNISM, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Electron density Streak camera business.industry Astrophysics::High Energy Astrophysical Phenomena General Physics and Astronomy chemistry.chemical_element Astrophysics Laser Supercritical fluid law.invention Radial velocity Optics Xenon chemistry law Brightness temperature Radiative transfer [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] business |
| Zdroj: | Journal de Physique IV Proceedings Journal de Physique IV Proceedings, 2006, 133, pp.1039-1041. ⟨10.1051/jp4:2006133210⟩ |
| ISSN: | 1764-7177 1155-4339 |
| DOI: | 10.1051/jp4:2006133210 |
| Popis: | International audience; In the framework of the Laboratory Astrophysics, we present new radiative shocks experiments performed using the LULI2000 facility. A strong shock is driven in a multi-layered solid target (CH-Ti-CH) which accelerates into a gas cell (˜ 60 km/s) filled with Xenon at low pressure (0.1 - 0.3 bar) and produces a radiative supercritical shock [4, 8]. A low power laser beam (8 ns - 532 nm) probes the Xenon gas in the transverse direction and is injected into a VISAR and on two optical framing cameras (GOI). These diagnostics allow to determine electron density variation, to measure both precursor and shock velocities along the shock propagation axis [3, 5] as well as the 2D shape of the shock. On rear side, the light emitted from the shocked Xenon is imaged onto the slit of a streak camera. An absolute calibration of the optical system allows to determine the brightness temperature [8]. Data were obtained for different laser intensities and gas pressures. Two VISARs on rear side allowed an accurate measurement of the shock conditions in the pusher before the breakout in the Xenon. Comparison between 1D (MULTI) and 2D (DUED [1, 2]) radiative hydrodynamic codes and measured quantities (shock velocity, shape, radial expansion, and temperature as well as precursor velocity and precursor electron density) are presented. |
| Databáze: | OpenAIRE |
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