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The hydrodynamic efficiency of laser-target acceleration
Sanmartín Losada, Juan Ramón and Montañés García, José Luis and Sanz Recio, Javier and Ramis Abril, Rafael
The hydrodynamic efficiency of laser-target acceleration.
"Plasma Physics and Controlled Fusion", v. 27
The acceleration of a thin foil using a laser pulse is studied. It is shown that the acceleration efficiency eta H is heavily dependent on the behaviour of the corona ejected by the foil: there is no universal relation eta H( Delta M/M0),M0 and Delta M being initial foil mass and ablated mass, respectively. Known results on the coronal flow are used to check the theory against experimental data available in the literature; effects due to both a non-planar corona, and the time-dependence of the laser irradiance, are considered. The agreement with experiments is substantially better than that for previous analyses. Acceleration of thin spherical shells is also discussed.
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