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Title: Field reconstruction from proton radiography of intense laser driven magnetic reconnection

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.5092733 · OSTI ID:1545010

Magnetic reconnection is a process that contributes significantly to plasma dynamics and energy transfer in a wide range of plasma and magnetic field regimes, including inertial confinement fusion experiments, stellar coronae and compact, highly magnetized objects like neutron stars. Laboratory experiments in different regimes can help refine, expand and test the applicability of theoretical models to describe reconnection. Laser-plasma experiments exploring magnetic reconnection at moderate intensities (IL ~ 1014 Wcm-2) have been performed previously, where the Biermann battery effect self-generates magnetic fields and the field dynamics studied using proton radiog- raphy. At high laser intensities (ILλ$$2\atop{L}$$ > 1018 Wcm-2 μm2 ), relativistic surface currents and the time-varying electric sheath fields generate the azimuthal magnetic fields. Numerical modeling of these intensities has shown the conditions within the magnetic field region can reach the threshold where the magnetic energy can exceed the rest mass energy such that σcold = B2/(μ0nemec2) > 1 [A. E. Raymond, et al., Phys. Rev. E, 98, 043207 (2018)]. Presented here is the analysis of the proton radiography of a high-intensity (~ 1018 Wcm-2) laser driven magnetic reconnection geometry. Lastly, the path integrated magnetic fields are recovered using a “field-reconstruction algorithm” to quantify the field strengths, geometry and evolution.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002727
OSTI ID:
1545010
Alternate ID(s):
OSTI ID: 1557377
Journal Information:
Physics of Plasmas, Vol. 26, Issue 8; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Figures / Tables (8)