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Title: Magnetic signatures of radiation-driven double ablation fronts

Abstract

In experiments performed with the OMEGA EP laser system, magnetic field generation in double ablation fronts was observed. Proton radiography measured the strength, spatial profile, and temporal dynamics of self-generated magnetic fields as the target material was varied between plastic (CH), aluminum, copper, and gold. Two distinct regions of magnetic field are generated in mid-Z targets -- one produced by gradients from electron thermal transport and the second from radiation-driven gradients. Extended magnetohydrodynamic simulations including radiation transport reproduced key aspects of the experiment, including field generation and double ablation front formation.

Authors:
 [1];  [2];  [1];  [2];  [2];  [1];  [3];  [1];  [1];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Imperial College, London (United Kingdom)
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
Contributing Org.:
Imperial College London
OSTI Identifier:
1647229
Alternate Identifier(s):
OSTI ID: 1647227; OSTI ID: 1647228
Grant/Contract Number:  
NA0003606; NA0003764; SC0014664
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 125; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; High-energy-density plasmas; Inertial confinement fusion; Laser-plasma interactions; Magnetic field generation & plasma dynamo

Citation Formats

Campbell, Paul T., Walsh, Christopher A., Russell, Brandon K., Chittenden, Jeremy P., Crilly, Aidan, Fiksel, Gennady, Nilson, Philip M., Thomas, Alexander G. R., Krushelnick, Karl, and Willingale, Louise. Magnetic signatures of radiation-driven double ablation fronts. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevLett.125.145001.
Campbell, Paul T., Walsh, Christopher A., Russell, Brandon K., Chittenden, Jeremy P., Crilly, Aidan, Fiksel, Gennady, Nilson, Philip M., Thomas, Alexander G. R., Krushelnick, Karl, & Willingale, Louise. Magnetic signatures of radiation-driven double ablation fronts. United States. https://doi.org/10.1103/PhysRevLett.125.145001
Campbell, Paul T., Walsh, Christopher A., Russell, Brandon K., Chittenden, Jeremy P., Crilly, Aidan, Fiksel, Gennady, Nilson, Philip M., Thomas, Alexander G. R., Krushelnick, Karl, and Willingale, Louise. Mon . "Magnetic signatures of radiation-driven double ablation fronts". United States. https://doi.org/10.1103/PhysRevLett.125.145001.
@article{osti_1647229,
title = {Magnetic signatures of radiation-driven double ablation fronts},
author = {Campbell, Paul T. and Walsh, Christopher A. and Russell, Brandon K. and Chittenden, Jeremy P. and Crilly, Aidan and Fiksel, Gennady and Nilson, Philip M. and Thomas, Alexander G. R. and Krushelnick, Karl and Willingale, Louise},
abstractNote = {In experiments performed with the OMEGA EP laser system, magnetic field generation in double ablation fronts was observed. Proton radiography measured the strength, spatial profile, and temporal dynamics of self-generated magnetic fields as the target material was varied between plastic (CH), aluminum, copper, and gold. Two distinct regions of magnetic field are generated in mid-Z targets -- one produced by gradients from electron thermal transport and the second from radiation-driven gradients. Extended magnetohydrodynamic simulations including radiation transport reproduced key aspects of the experiment, including field generation and double ablation front formation.},
doi = {10.1103/PhysRevLett.125.145001},
journal = {Physical Review Letters},
number = 14,
volume = 125,
place = {United States},
year = {2020},
month = {9}
}

Journal Article:
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