<u>Systematic measurements of quasi-static B-fields from laser-driven coil targets in intensity regime relevant for magneto-inertial fusion experiments</u>

POSTER

Abstract

Strong quasi-static magnetic fields to be applied in high-energy density plasma experiments can be driven from laser interactions with coil-targets (CT), which geometry provides easy access for several diagnostics and do not produce a significant quantity of debris.

We demonstrated the generation of quasi-static magnetic fields of tens of Teslas using a 500 J, ns laser, focused to ~1015 W/cm2. The B-field was characterized using proton deflectometry at two perpendicular probing axes. Data confrontation with particle test simulations reveal features that can be distinctively linked to the looping current and with static charging of the wire surface.  Discharge currents of ˜25 kA (yielding ˜60 T at the center of 500 µm-diameter coils) are fully consistent with our predictions based on the plasma diode model, which has been continuously improved and validated through benchmarking experiments over the past years. The studied intensity regime is of interest for ns laser-drive available at large scale laser facilities such as Omega, NIF, or LMJ, where it is possible to carry out magneto-inertial-fusion experiments.

 

*Work supported by the NNSA/NLUF Grant DE-NA0003940, Grant No. PID2019-108764RB-I00 (MICINN,

Spain) and EUROfusion Consortium under grant agreement No. 633053.

*Work supported by the NNSA/NLUF Grant DE-NA0003940, Grant No. PID2019-108764RB-I00 (MICINN,Spain) and EUROfusion Consortium under grant agreement No. 633053.

Presenters

  • CHRISTOS VLACHOS

    • CELIA - University of Bordeaux

Authors

  • CHRISTOS VLACHOS

    • CELIA - University of Bordeaux

  • Valeria Ospina-Bohorquez

    • CELIA - University of Bordeaux
    • University of Bordeaux, CNRS, CELIA, CEA-DAM-DIF, University of Salamanca
    • CEA, DAM, DIF, 91297 Arpajon, France. ; University of Salamanca, Salamanca, Spain. ; CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), University of Bordeaux, Talence

  • Gabriel Perez Callejo

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

  • Michael Ehret

    • Centro de Laseres Pulsados (CLPU)
    • CELIA

  • Mathieu Bailly-Grandvaux

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

  • Sophia Malko

    • PPPL
    • CLPU
    • Princeton Plasma Physics Laboratory

  • Channprit Kaur

    • University of Alberta

  • Morgane Lendrin

    • CELIA - University of Bordeaux
    • University of Bordeaux

  • Pierre Guillon

    • CELIA & Ecole Polytechnique
    • Ecole Polytechnique

  • Matthew Gjevre

    • University of Alberta

  • Eitan Soussan

    • LULI & Ecole National Supérieure de Lyon

  • Michel Koenig

    • Ecole Polytechnique
    • LULI
    • LULI & Ecole Polytechnique

  • Xavier Vaisseau

    • CEA, DAM, DIF, F-91297 Arpajon, France

  • Laurent Gremillet

    • CEA, DAM, DIF, F-91297 Arpajon, France
    • CEA-DAM-DIF

  • Bruno Albertazzi

    • Ecole Polytechnique
    • LULI & Ecole Polytechnique

  • Robert Fedosejevs

    • University of Alberta
    • Department of Electrical and Computing Engineering, University of Alberta, Canada.

  • Joao J Santos

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