Measurement of Magnetic Cavitation Driven by Heat Flow in a Plasma

被引：2

作者：

Arran C. ^{[1
]}

Bradford P. ^{[1
]}

Dearling A. ^{[1
]}

Hicks G.S. ^{[2
,6
]}

Al-Atabi S. ^{[2
,6
]}

Antonelli L. ^{[3
]}

Ettlinger O.C. ^{[2
,6
]}

Khan M. ^{[1
]}

Read M.P. ^{[3
]}

Glize K. ^{[4
]}

Notley M. ^{[4
]}

Walsh C.A. ^{[5
]}

Kingham R.J. ^{[6
]}

Najmudin Z. ^{[2
,6
]}

Ridgers C.P. ^{[1
]}

Woolsey N.C. ^{[1
]}

机构：

[1] York Plasma Institute, University of York, York

[2] The John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London

[3] First Light Fusion Ltd., Unit 9/10 Oxford Industrial Park, Mead Road, Yarnton, Kidlington

[4] Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot

[5] Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, 94550-9234, CA

[6] Blackett Laboratory, Imperial College London, London

来源：

Physical Review Letters | 2023年 / 131卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Compendex;

D O I：

10.1103/PhysRevLett.131.015101

中图分类号：

学科分类号：

摘要：

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 vN=(6±2)×105 m/s. Kinetic and extended magnetohydrodynamic simulations agree well in this regime due to the buildup of a magnetic transport barrier. © 2023 authors. Published by the American Physical Society.

引用

共 41 条

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