Magnetic Signatures of Radiation-Driven Double Ablation Fronts
- 28 September 2020
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 125 (14), 145001
- https://doi.org/10.1103/PhysRevLett.125.145001
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, 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.Funding Information
- U.S. Department of Energy (DE-NA0003606, DE-NA0003764, DE-SC0014664)
- National Nuclear Security Administration
- Oak Ridge Institute for Science and Education
- Oak Ridge Associated Universities
- National Science Foundation (175142)
- Imperial College London
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