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Turbulent hydrodynamics experiments in high energy density plasmas: scientific case and preliminary results of the TurboHEDP project

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Abstract

The physics of compressible turbulence in high energy density (HED) plasmas is an unchartered experimental area. Simulations of compressible and radiative flows relevant for astrophysics rely mainly on subscale parameters. Therefore, we plan to perform turbulent hydrodynamics experiments in HED plasmas (TurboHEDP) in order to improve our understanding of such important phenomena for interest in both communities: laser plasma physics and astrophysics. We will focus on the physics of supernovae remnants which are complex structures subject to fluid instabilities such as the Rayleigh–Taylor and Kelvin–Helmholtz instabilities. The advent of megajoule laser facilities, like the National Ignition Facility and the Laser Megajoule, creates novel opportunities in laboratory astrophysics, as it provides unique platforms to study turbulent mixing flows in HED plasmas. Indeed, the physics requires accelerating targets over larger distances and longer time periods than previously achieved. In a preparatory phase, scaling from experiments at lower laser energies is used to guarantee the performance of future MJ experiments. This subscale experiments allow us to develop experimental skills and numerical tools in this new field of research, and are stepping stones to achieve our objectives on larger laser facilities. We review first in this paper recent advances in high energy density experiments devoted to laboratory astrophysics. Then we describe the necessary steps forward to commission an experimental platform devoted to turbulent hydrodynamics on a megajoule laser facility. Recent novel experimental results acquired on LULI2000, as well as supporting radiative hydrodynamics simulations, are presented. Together with the development of LiF detectors as transformative X-ray diagnostics, these preliminary results are promising on the way to achieve micrometric spatial resolution in turbulent HED physics experiments in the near future.

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DOI:10.1017/hpl.2018.34

基金项目:This material is based upon work supported by the Agence Nationale de la Recherche under the ANR project TurboHEDP (ANR-15-CE30-0011). We would like to acknowledge the efforts of the LULI2000 operations crew, as well as the precision machining capabilities of C. Spindloe from Scitech.

收稿日期:2018-02-03

录用日期:2018-05-07

网络出版日期:2018-05-14

作者单位    点击查看

A. Casner:Université de Bordeaux-CNRS-CEA, CELIA (CEntre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France
G. Rigon:LULI - CNRS, école Polytechnique, CEA, Université Paris-Saclay, UPMC Univ Paris 06 : Sorbonne Universités -F-91128 Palaiseau cedex, FranceENS Lyon, Université de Lyon, CHELS, 69342 Lyon, France
B. Albertazzi:LULI - CNRS, école Polytechnique, CEA, Université Paris-Saclay, UPMC Univ Paris 06 : Sorbonne Universités -F-91128 Palaiseau cedex, France
Th. Michel:LULI - CNRS, école Polytechnique, CEA, Université Paris-Saclay, UPMC Univ Paris 06 : Sorbonne Universités -F-91128 Palaiseau cedex, France
T. Pikuz:Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka 565-0871, JapanJoint Institute for High Temperature RAS, Moscow 125412, Russia
A. Faenov:Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka 565-0871, JapanJoint Institute for High Temperature RAS, Moscow 125412, Russia
P. Mabey:LULI - CNRS, école Polytechnique, CEA, Université Paris-Saclay, UPMC Univ Paris 06 : Sorbonne Universités -F-91128 Palaiseau cedex, France
N. Ozaki:Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, JapanInstitute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
Y. Sakawa:Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
T. Sano:Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
J. Ballet:Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Département d’Astrophysique, CEA Saclay, F-91191 Gif sur Yvette, France
P. Tzeferacos:Flash Center for Computational Science, University of Chicago, USA
D. Lamb:Flash Center for Computational Science, University of Chicago, USA
E. Falize:0CEA, DAM, DIF, F-91297 Arpajon, France
G. Gregori:1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
M. Koenig:LULI - CNRS, école Polytechnique, CEA, Université Paris-Saclay, UPMC Univ Paris 06 : Sorbonne Universités -F-91128 Palaiseau cedex, FranceGraduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

联系人作者:A. Casner(alexis.casner@u-bordeaux.fr)

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引用该论文

A. Casner, G. Rigon, B. Albertazzi, Th. Michel, T. Pikuz, A. Faenov, P. Mabey, N. Ozaki, Y. Sakawa, T. Sano, J. Ballet, P. Tzeferacos, D. Lamb, E. Falize, G. Gregori, and M. Koenig, "Turbulent hydrodynamics experiments in high energy density plasmas: scientific case and preliminary results of the TurboHEDP project," High Power Laser Science and Engineering 6(3), e44 (2018)

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