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Measuring magnetic flux suppression in high-power laser-plasma interactions

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Title: Measuring magnetic flux suppression in high-power laser-plasma interactions
Authors: Campbell, PT
Walsh, CA
Russell, BK
Chittenden, JP
Crilly, A
Fiksel, G
Gao, L
Igumenshchev, IV
Nilson, PM
Thomas, AGR
Krushelnick, K
Willingale, L
Item Type: Journal Article
Abstract: Biermann battery magnetic field generation driven by high power laser–solid interactions is explored in experiments performed with the OMEGA EP laser system. Proton deflectometry captures changes to the strength, spatial profile, and temporal dynamics of the self-generated magnetic fields as the target material or laser intensity is varied. Measurements of the magnetic flux during the interaction are used to help validate extended magnetohydrodynamic (MHD) simulations. Results suggest that kinetic effects cause suppression of the Biermann battery mechanism in laser–plasma interactions relevant to both direct and indirect-drive inertial confinement fusion. Experiments also find that more magnetic flux is generated as the target atomic number is increased, which is counter to a standard MHD understanding.
Issue Date: 1-Jan-2022
Date of Acceptance: 4-Dec-2021
URI: http://hdl.handle.net/10044/1/94046
DOI: 10.1063/5.0062717
ISSN: 1070-664X
Publisher: American Institute of Physics
Journal / Book Title: Physics of Plasmas
Volume: 29
Issue: 1
Copyright Statement: © 2022 Author(s). Published under an exclusive license by AIP Publishing
Sponsor/Funder: AWE Plc
Lawrence Livermore National Laboratory
Lawrence Livermore National Laboratory
U.S Department of Energy
Funder's Grant Number: 30469588
B640100
B643873
Subcontract No B648336
Keywords: Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
TRANSPORT-COEFFICIENTS
FIELDS
GENERATION
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
TRANSPORT-COEFFICIENTS
FIELDS
GENERATION
Fluids & Plasmas
0201 Astronomical and Space Sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0203 Classical Physics
Publication Status: Published
Article Number: ARTN 012701
Appears in Collections:Physics
Plasma Physics