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Creators/Authors contains: "Kemp, Andreas J"

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  1. ; ; ; ; (, Physical Review Research)
    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 multidimensional kinetic simulations with varying laser pulse intensity and duration at fixed energy of 200J. A phenomenological model for the transition from superponderomotive to ponderomotive temperatures is described, yielding a temperature scaling that depends on pulse duration and density scale length. The shortest pulses create low-divergence electron beams before self-generated magnetic fields evolve, yielding 1–5−MeV forward-going x rays containing ∼0.5% of the laser energy. 
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