Measurements of Extended Magnetic Fields in Laser-Solid Interaction
Abstract
Magnetic fields generated from a laser-foil interaction are measured with high fidelity using a proton radiography scheme with in situ x-ray fiducials. In contrast to prior findings under similar experimental conditions, this technique reveals the self-generated, Biermann-battery fields extend beyond the edge of the expanding plasma plume to a radius of over 3.5 mm by t=+1.4 ns, a result not captured in state-of-the-art magneto-hydrodynamics simulations. An analysis of two mono-energetic proton populations confirms that proton deflection is dominated by magnetic fields far from the interaction (>2 mm) and electric fields are insignificant. Comparisons to prior work suggest a new physics mechanism for the magnetic field generation and transport in laser-solid interactions.
Cite
@article{arxiv.2310.18592,
title = {Measurements of Extended Magnetic Fields in Laser-Solid Interaction},
author = {J. Griff-McMahon and S. Malko and V. Valenzuela-Villaseca and C. Walsh and G. Fiksel and M. J. Rosenberg and D. B. Schaeffer and W. Fox},
journal= {arXiv preprint arXiv:2310.18592},
year = {2023}
}
Comments
9 pages, 8 figures