Arran, Christopher orcid.org/0000-0002-8644-8118, Dearling, Adam, Bradford, Philip et al. (13 more authors) (2023) Measurement of magnetic cavitation driven by heat flow in a plasma. Physical Review Letters. 015101. ISSN 1079-7114
Abstract
We describe the direct measurement of the expulsion of a magnetic field from a plasma driven by heat flow. Using a laser to heat a column of gas within an applied magnetic field, we isolate Nernst advection and show how it changes the field over a nanosecond timescale. Reconstruction of the magnetic field map from proton radiographs demonstrates that the field is advected by heat flow in advance of the plasma expansion with a velocity v_N=(6±2)×10^5 m/s. Kinetic and extended magnetohydrodynamic simulations agree well in this regime due to the buildup of a magnetic transport barrier.
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Copyright, Publisher and Additional Information: | 5 pages, 4 figures | ||||
Keywords: | physics.plasm-ph | ||||
Dates: |
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) | ||||
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Depositing User: | Pure (York) | ||||
Date Deposited: | 08 Jun 2023 23:20 | ||||
Last Modified: | 01 Feb 2024 13:20 | ||||
Published Version: | https://doi.org/10.1103/PhysRevLett.131.015101 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1103/PhysRevLett.131.015101 |
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Filename: PhysRevLett.131.015101.pdf
Description: Measurement of Magnetic Cavitation Driven by Heat Flow in a Plasma
Licence: CC-BY 2.5