Abstract
The formation of strong, high Mach number (2–3), electrostatic shocks by laser pulses incident on overdense plasma slabs is observed in one- and two-dimensional particle-in-cell simulations, for a wide range of intensities, pulse durations, target thicknesses, and densities. The shocks propagate undisturbed across the plasma, accelerating the ions (protons). For a dimensionless field strength parameter (, where is the intensity and the wavelength), and target thicknesses of a few microns, the shock is responsible for the highest energy protons. A plateau in the ion spectrum provides a direct signature for shock acceleration.
- Received 29 May 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.015002
©2004 American Physical Society