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Cylindrical compressions with embedded B-field to characterize strongly magnetized hot dense plasmas.

ORAL

Abstract

The use of external magnetic fields in ICF has been identified as a promising way to assist ignition. For this relatively new area of sustained research, the magnetic field transport during compression and related magnetized plasma dynamics must be studied. We propose a platform for the OMEGA-60 laser facility to study MHD effects in cylindrical implosions at regimes of large magnetic pressure and magnetization. Cylindrical targets are filled with Ar-doped D2 gas and are symmetrically imploded using a 36-beam, 15 kJ, 1.5 ns laser drive. To investigate the effects of magnetization, implosions are characterized using X-ray framed imaging and Ar K-shell line-emission spectroscopy. 2-D simulations using the MHD code GORGON predict that a seed B-field of 30 T is compressed to ~30 kT. As a result, the characteristic conditions of the compressed core and the emitted Ar spectrum are modified. We present results of implosions with a seed B-field induced in laser-driven coils and MIFEDS. According to proton probing, the seed B-field generated with laser-driven coils was <10 T, likely due to the large inductance of the coils. Carrying out such magnetized implosion experiments will advance modeling of B-field compression and diffusion, and benchmark atomic kinetics and line shape calculations in magnetized plasmas relevant to complex ICF-related experiments with embedded B-fields.

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Presenters

  • Mathieu Bailly-Grandvaux

    University of California San Diego, University of California, San Diego

Authors

  • Mathieu Bailly-Grandvaux

    University of California San Diego, University of California, San Diego

  • Chris A Walsh

    Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab, Lawrence Livermore National Lab

  • Ricardo Florido

    University of Las Palmas de Gran Canaria, Universidad de Las Palmas de Gran Canaria

  • Christopher McGuffey

    University of California, San Diego, Center for Energy Research,University of California, San Diego, USA.; General Atomics, San Diego, USA.

  • Joao J Santos

    University of Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), University of Bordeaux, Talence, France.

  • Gabriel Perez Callejo

    Université de Bordeaux - CEA/CESTA, University of Bordeaux, CELIA - University of Bordeaux, CELIA

  • Francisco Suzuki-Vidal

    Imperial College London

  • Christos Vlachos

    University of Bordeaux

  • Marco A Gigosos

    Universidad de Valladolid, University of Valladolid

  • Roberto C Mancini

    University of Nevada, Reno

  • Farhat N Beg

    University of California San Diego, University of California, San Diego, Center for Energy Research,University of California, San Diego, USA.