Ultraintense laser interaction with nanoscale target [electronic resource] : a simple model for layer expansion and ion acceleration
- Washington, D.C. : United States. Dept. of Energy, 2009. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Additional Creators:
- Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- A simple model has been derived for the expansion of a thin (up to 100s of nm thickness), solid-density target driven by an u.ltraintense laser. In this regime, new ion acceleration mechanisms, such as the Break-Out Afterburner (BOA) , emerge with the potential to dramatically improve energy, efficiency, and energy spread of laser-driven ion beams. Such beams have been proposed  as drivers for fast ignition inertial confinement fusion . Analysis of kinetic simulations of the BOA shows two dislinct times that bound the period of enhanced acceleration: t₁, when the target becomes relativistically transparent to the laser, and t₂, when the target becomes classically underdense and the enhanced acceleration terminates. A silllple dynamical model for target expansion has been derived that contains both the early, one-dimensional (lD) expansion of the target as well as three-dimensional (3D) expansion of the plasma at late times, The model assumes that expansion is slab-like at the instantaneous ion sound speed and requires as input target composition, laser intensity, laser spot area, and the efficiency of laser absorption into electron thermal energy.
- Published through SciTech Connect., 01/01/2009., "la-ur-09-07049", " la-ur-09-7049", Inertial Fusion Science and Applications conference ; September 6, 2009 ; San Francisco, CA., and Kwan, Thomas J T; Tajima, Toshi; Yin, Lin; Huang, Chengkun; Fernandez, Juan C; Flippo, Kirk A; Yan, Xue Q; Bowers, Kevin J; Habs, Dieter; Albright, Brian J; Henig, Andreas; Gaillard, Sandrine; Hegelich, Bjoorn M.
- Funding Information:
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