Work

Maximizing MeV x-ray dose in relativistic laser-solid interactions

Year: 2022

Type: preprint

Abstract: Bremsstrahlung x-rays generated in laser-solid interactions can be used as light sources for high-energy-density science. We present electron and x-ray spectra from particle-in-cell and Monte Carlo simulations, varying laser pulse intensity and duration at fixed energy of 200$\,$J. Superponderomotive electron temperatures are observed at low intensity; a new temperature scaling is given that depends on pulse duration and density scale length. Short, high-intensity pulses create low-divergence electron beams before self-generated magnetic fields evolve, resulting in more forward-going MeV x-rays.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2202.04853

Authors: Miller, Kyle G., Rusby, Dean R., Kemp, Andreas J., Wilks, Scott C., Mori, Warren B.

Institutions: University of California, Los Angeles, Lawrence Livermore National Laboratory

Language: English

Topic: Laser-Plasma Interactions and Diagnostics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, National Energy Research Scientific Computing Center, Laboratory Directed Research and Development, Lawrence Livermore National Laboratory

Awards: G1088636562, G1356433355, G14554683, G1806365414, G1984347537, G2145270357, G3669113783, G3935573023, G4744444288, G5630301777, G5957427626, Continuation of Full-Scale Three-Dimensional Numerical Experiments on High-Intensity Particle and Laser Beam-Matter Interactions, G7652800846, G895790057, G991281326

OpenAlex ID: W4226090674

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