Publications associated with Plasma Theory


Laser-driven strong magnetostatic fields with applications to charged beam transport and magnetized high energy-density physics

Physics of Plasmas AIP Publishing 25 (2018) 056705

JJ Santos, M Bailly-Grandvaux, AV Arefiev, M Ehret, D Batani, A Calisti, FN Beg, S Ferri, R Florido, P Forestier-Colleoni, S Fujioka, MA Gigosos, L Giuffrida, L Gremillet, JJ Honrubia, S Kojima, P Korneev, KFF Law, J-R Marques, A Morace, C Mosse, O Peyrusse, S Rose, M Roth, F Suzuki-Vidal

Powerful laser-plasma processes are explored to generate discharge currents of a few 100 kA in coil targets, yielding magnetostatic fields (B-fields) in excess of 0.5 kT. The quasi-static currents are provided from hot electron ejection from the laser-irradiated surface. According to our model, which describes the evolution of the discharge current, the major control parameter is the laser irradiance Ilasλ 2 las. The space-time evolution of the B-fields is experimentally characterized by high-frequency bandwidth B-dot probes and by protondeflectometry measurements. The magnetic pulses, of ns-scale, are long enough to magnetize secondary targets through resistive diffusion. We applied it in experiments of laser-generated relativistic electron transport through solid dielectric targets, yielding an unprecedented 5-fold enhancement of the energy-density flux at 60 µm depth, compared to unmagnetized transport conditions. These studies pave the ground for magnetized high-energy density physics investigations, related to laser-generated secondary sources of radiation and/or high-energy particles and their transport, to high-gain fusion energy schemes and to laboratory astrophysics.


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