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Magneto-inertial Approach to Direct-drive Laser Fusion
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Journal Article
Magneto-inertial Approach to Direct-drive Laser Fusion
2008
Overview
A magneto-inertial fusion (MIF) approach to inertial confinement fusion (ICF), based on laser-driven magnetic-flux compression (LDFC) is described. This approach benefits from both the high-energy-density characteristic to ICF and the thermal insulation of the fuel by magnetic fields, typical of MFE. The reduction in thermal-conduction losses in the hot spot of an imploding target that has trapped and amplified a pre-seeded magnetic flux leads to increased hot-spot temperatures at lower implosion velocities than required in conventional ICF. This can lead to ignition designs with larger energy gains. This work describes the main concept and the use of a compact magnetic-pulse system to seed a macroscopic magnetic field into cylindrical DD-filled targets, which are radially driven with the OMEGA laser. The compression of the internal magnetic flux is measured with proton deflectometry. Magnetohydrodynamic simulations predict compression of a 0.1-MG seed field to multi-megagauss values, at which levels the radial electron thermal conduction in the hot spot is significantly inhibited. Initial benchmark experiments are described.
Publisher
Springer US,Springer,Springer Nature B.V
Subject
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
/ Ablation
/ Controled nuclear fusion plants
/ Energy
/ Energy. Thermal use of fuels
/ Exact sciences and technology
/ Geometry
/ IGNITION
/ Installations for energy generation and conversion: thermal and electrical energy
/ LASERS
/ Magnetohydrodynamic simulation
/ Physics
/ Plasma
/ SEEDS
/ TARGETS
