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Scaling of laser-driven electron and proton acceleration as a function of laser pulse duration, energy, and intensity in the multi-picosecond regime

2021; American Institute of Physics; Volume: 28; Issue: 1 Linguagem: Inglês

10.1063/5.0023612

1527-2419

Raspberry Simpson, G. G. Scott, D. Mariscal, D. Rusby, Paul King, Elizabeth Grace, A. Aghedo, Isabella Pagano, Mitchell Sinclair, C. D. Armstrong, M. J.-E. Manuel, A. Haid, Kirk Flippo, L. A. Winslow, M. Gatu Johnson, J. A. Frenje, D. Neely, S. Kerr, G. J. Williams, Scott Andrews, R. Cauble, K. Charron, R. Costa, Bettina Fischer, Stephen M. Maricle, Brent C. Stuart, F. Albert, N. Lemos, A. Mackinnon, A. G. MacPhee, A. Pak, T. Ma,

High-pressure geophysics and materials

A scaling study of short-pulse laser-driven proton and electron acceleration was conducted as a function of pulse duration, laser energy, and laser intensity in the multi-picosecond (ps) regime (∼0.8 ps–20 ps). Maximum proton energies significantly greater than established scaling laws were observed, consistent with observations at other multi-ps laser facilities. In addition, maximum proton energies and electron temperatures in this regime were found to be strongly dependent on the laser pulse duration and preplasma conditions. A modified proton scaling model is presented that is able to better represent the accelerated proton characteristics in this multi-ps regime.