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DOE OSTI · 2540001

Magnetized ICF implosions: non-axial magnetic field topologies

Walsh, C. A. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000266393543)·Strozzi, D. J. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000188143791)·Povilus, A. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·O’Neill, S. T. [Imperial College, London (United Kingdom of Great Britain and Northern Ireland)] (ORCID:0000000274186675)·Leal, L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)]·Pollock, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000345340941)·Sio, H. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000017274236X)·Hammel, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000801354114)·Djordjević, B. Z. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000266774813)·Chittenden, J. P. [Imperial College, London (United Kingdom of Great Britain and Northern Ireland)] (ORCID:0000000270394012)·Moody, J. D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000331320122)
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Abstract

This paper explores four different magnetic field topologies for application to spherical inertial confinement fusion implosions: axial, mirror, cusp and closed field lines. A mirror field is found to enhance the impact of magnetization over an axial field; this is because the mirror field more closely follows the hot-spot surface. A cusp field, while simple to generate, is not found to have any benefits over the tried-and-tested axial field. Closed field lines are found to be of the greatest benefit to hot-spot performance, with the simulated design undergoing a 2× increase in ion temperature before α-heating is considered. The plasma properties of the simulation with closed field lines are radically different from the unmagnetized counterpart, with electron temperatures in excess of 100 keV, suggesting that a fundamental redesign of the capsule implosion is possible if this method is pursued.

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70 PLASMA PHYSICS AND FUSION TECHNOLOGYinertial confinement fusionmagnetized plasmasnational ignition facilitypre-magnetized ICF

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Walsh, C. A. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000266393543), Strozzi, D. J. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000188143791), Povilus, A. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], O’Neill, S. T. [Imperial College, London (United Kingdom of Great Britain and Northern Ireland)] (ORCID:0000000274186675), Leal, L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Pollock, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000345340941), Sio, H. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000017274236X), Hammel, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000801354114), Djordjević, B. Z. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000266774813), Chittenden, J. P. [Imperial College, London (United Kingdom of Great Britain and Northern Ireland)] (ORCID:0000000270394012), Moody, J. D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000331320122). 2025-02-28. Magnetized ICF implosions: non-axial magnetic field topologies. https://doi.org/10.1088/1741-4326%2Fadb7f0

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