Cylindrical implosion platform for the study of highly magnetized plasmas at Laser MegaJoule
| Autor: | G. Pérez-Callejo, C. Vlachos, C. A. Walsh, R. Florido, M. Bailly-Grandvaux, X. Vaisseau, F. Suzuki-Vidal, C. McGuffey, F. N. Beg, P. Bradford, V. Ospina-Bohórquez, D. Batani, D. Raffestin, A. Colaïtis, V. Tikhonchuk, A. Casner, M. Koenig, B. Albertazzi, R. Fedosejevs, N. Woolsey, M. Ehret, A. Debayle, P. Loiseau, A. Calisti, S. Ferri, J. Honrubia, R. Kingham, R. C. Mancini, M. A. Gigosos, J. J. Santos |
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| Přispěvatelé: | 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), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'études scientifiques et techniques d'Aquitaine (CESTA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), ANR-17-EURE-0027,LIGHTS&T,University of Bordeaux Graduate Scholl in Light Sciences & Technologies(2017) |
| Rok vydání: | 2022 |
| Předmět: |
cylinder
experimental equipment OMEGA Physics::Plasma Physics hydrodynamics [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] magnetization numerical calculations plasma [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] nucleus: fusion laser |
| Zdroj: | Phys.Rev.E Phys.Rev.E, 2022, 106 (3), pp.035206. ⟨10.1103/PhysRevE.106.035206⟩ |
| ISSN: | 2470-0053 |
| Popis: | International audience; Investigating the potential benefits of the use of magnetic fields in inertial confinement fusion experiments has given rise to experimental platforms like the Magnetized Liner Inertial Fusion approach at the Z-machine (Sandia National Laboratories) or its laser-driven equivalent at OMEGA (Laboratory for Laser Energetics). Implementing these platforms at MegaJoule-scale laser facilities, such as the Laser MegaJoule (LMJ) or the National Ignition Facility (NIF), is crucial to reaching self-sustained nuclear fusion and enlarges the level of magnetization that can be achieved through a higher compression. In this paper, we present a complete design of an experimental platform for magnetized implosions using cylindrical targets at LMJ. A seed magnetic field is generated along the axis of the cylinder using laser-driven coil targets, minimizing debris and increasing diagnostic access compared with pulsed power field generators. We present a comprehensive simulation study of the initial B field generated with these coil targets, as well as two-dimensional extended magnetohydrodynamics simulations showing that a 5 T initial B field is compressed up to 25 kT during the implosion. Under these circumstances, the electrons become magnetized, which severely modifies the plasma conditions at stagnation. In particular, in the hot spot the electron temperature is increased (from 1 keV to 5 keV) while the density is reduced (from 40g/cm3 to 7g/cm3). We discuss how these changes can be diagnosed using x-ray imaging and spectroscopy, and particle diagnostics. We propose the simultaneous use of two dopants in the fuel (Ar and Kr) to act as spectroscopic tracers. We show that this introduces an effective spatial resolution in the plasma which permits an unambiguous observation of the B-field effects. Additionally, we present a plan for future experiments of this kind at LMJ. |
| Databáze: | OpenAIRE |
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