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Updated: Dec 5, 2025

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron
Published on: June 9, 2016
Magnetic Signatures of Radiation-Driven Double Ablation Fronts
P T Campbell1, C A Walsh2, B K Russell1
1Gérard Mourou Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109, USA.
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.
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