Imperial College London
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DrBrianAppelbe

Faculty of Natural Sciences, Department of Physics

Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7651b.appelbe07 Website

 
 
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Location

 

740Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Walsh:2019:10.1063/1.5085498,
author = {Walsh, CA and McGlinchey, K and Tong, JK and Appelbe, BD and Crilly, A and Zhang, MF and Chittenden, JP},
doi = {10.1063/1.5085498},
journal = {Physics of Plasmas},
title = {Perturbation modifications by pre-magnetisation of inertial confinement fusion implosions},
url = {http://dx.doi.org/10.1063/1.5085498},
volume = {26},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Pre-magnetisation of inertial confinement fusion implosions on the National Ignition Facility has the potential to raise current high-performing targets into the ignition regime [Perkins et al. "The potential of imposed magnetic fields for enhancing ignition probability and fusion energy yield in indirect-drive inertial confinement fusion," Phys. Plasmas 24, 062708 (2017)]. A key concern with this method is that the application of a magnetic field inherently increases asymmetry. This paper uses 3-D extended-magnetohydrodynamics Gorgon simulations to investigate how thermal conduction suppression, the Lorentz force, and α-particle magnetisation affect three hot-spot perturbation scenarios: a cold fuel spike, a time-dependent radiation drive asymmetry, and a multi-mode perturbation. For moderate magnetisations (B0 = 5 T), the single spike penetrates deeper into the hot-spot, as thermal ablative stabilisation is reduced. However, at higher magnetisations (B0 = 50 T), magnetic tension acts to stabilise the spike. While magnetisation of α-particle orbits increases the peak hot-spot temperature, no impact on the perturbation penetration depth is observed. The P4-dominated radiation drive asymmetry demonstrates the anisotropic nature of the thermal ablative stabilisation modifications, with perturbations perpendicular to the magnetic field penetrating deeper and perturbations parallel to the field being preferentially stabilised by increased heat-flows. Moderate magnetisations also increase the prevalence of high modes, while magnetic tension reduces vorticity at the hot-spot edge for larger magnetisations. For a simulated high-foot experiment, the yield doubles through the application of a 50 T magnetic field-an amplification which is expected to be larger for higher-performing configurations.
AU  - Walsh,CA
AU  - McGlinchey,K
AU  - Tong,JK
AU  - Appelbe,BD
AU  - Crilly,A
AU  - Zhang,MF
AU  - Chittenden,JP
DO  - 10.1063/1.5085498
PY  - 2019///
SN  - 1070-664X
TI  - Perturbation modifications by pre-magnetisation of inertial confinement fusion implosions
T2  - Physics of Plasmas
UR  - http://dx.doi.org/10.1063/1.5085498
UR  - http://hdl.handle.net/10044/1/74352
VL  - 26
ER  -
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