8
IRUS Total
Downloads
  Altmetric

Magnetized directly-driven ICF capsules: increased instability growth from non-uniform laser drive

File Description SizeFormat 
Walsh_2020_Nucl._Fusion_60_106006_accepted.pdfAccepted version2.24 MBAdobe PDFView/Open
Title: Magnetized directly-driven ICF capsules: increased instability growth from non-uniform laser drive
Authors: Walsh, CA
Crilly, AJ
Chittenden, JP
Item Type: Journal Article
Abstract: Simulations anticipate increased perturbation growth from non-uniform laser heating for magnetized direct-drive implosions. At the capsule pole, where the magnetic field is normal to the ablator surface, the field remains in the conduction zone and suppresses non-radial thermal conduction; in unmagnetized implosions this non-radial heat-flow is crucial in mitigating laser heating imbalances. Single-mode simulations show the magnetic field particularly amplifying short wavelength perturbations, whose behavior is dominated by thermal conduction. The most unstable wavelength can also become shorter. 3D multi-mode simulations of the capsule pole reinforce these findings, with increased perturbation growth anticipated across a wide range of scales. The results indicate that high-gain spherical direct-drive implosions require greater constraints on the laser heating uniformity when magnetized.
Issue Date: 1-Oct-2020
Date of Acceptance: 31-Jul-2020
URI: http://hdl.handle.net/10044/1/83009
DOI: 10.1088/1741-4326/abab52
ISSN: 0029-5515
Publisher: IOP Publishing
Start Page: 1
End Page: 8
Journal / Book Title: Nuclear Fusion
Volume: 60
Issue: 10
Copyright Statement: © 2020 IAEA, Vienna. This is an author-created, un-copyedited version of an article accepted for publication in Nuclear Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://iopscience.iop.org/article/10.1088/1741-4326/abab52
Sponsor/Funder: Lawrence Livermore National Laboratory
U.S Department of Energy
AWE Plc
Lawrence Livermore National Laboratory
Funder's Grant Number: B618573
83228-10968
30469588
B640100
Keywords: Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
magneto-inertial fusion
direct-drive ICF
alternative ignition concepts
magnetic fields in ICF
RAYLEIGH-TAYLOR INSTABILITY
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
magneto-inertial fusion
direct-drive ICF
alternative ignition concepts
magnetic fields in ICF
RAYLEIGH-TAYLOR INSTABILITY
Fluids & Plasmas
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
Publication Status: Published
Article Number: ARTN 106006
Online Publication Date: 2020-08-26
Appears in Collections:Physics
Plasma Physics