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Laser-driven platform for generation and characterization of strong quasi-static magnetic fields

Abstract : Quasi-static magnetic-fields up to 800 T are generated in the interaction of intense laser pulses (500 J, 1 ns, 10(17) W cm(-2)) with capacitor-coil targets of different materials. The reproducible magnetic-field peak and rise-time, consistent with the laser pulse duration, were accurately inferred from measurements with GHz-bandwidth inductor pickup coils (B-dot probes). Results from Faraday rotation of polarized optical laser light and deflectometry of energetic proton beams are consistent with the B-dot probe measurements at the early stages of the target charging, up to t approximate to 0.35 ns, and then are disturbed by radiation and plasma effects. The field has a dipole-like distribution over a characteristic volume of 1 mm(3), which is consistent with theoretical expectations. These results demonstrate a very efficient conversion of the laser energy into magnetic fields, thus establishing a robust laser-driven platform for reproducible, well characterized, generation of quasi-static magnetic fields at the kT-level, as well as for magnetization and accurate probing of high-energy-density samples driven by secondary powerful laser or particle beams.
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https://hal-cea.archives-ouvertes.fr/cea-01246238
Contributor : Marianne Leriche <>
Submitted on : Friday, December 18, 2015 - 11:50:11 AM
Last modification on : Sunday, August 2, 2020 - 5:26:05 AM

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J J Santos, M Bailly-Grandvaux, L Giuffrida, P Forestier-Colleoni, S Fujioka, et al.. Laser-driven platform for generation and characterization of strong quasi-static magnetic fields. New Journal of Physics, Institute of Physics: Open Access Journals, 2015, 17 (8), pp.083051 ⟨10.1088/1367-2630/17/8/083051⟩. ⟨cea-01246238⟩

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