GeV proton beams from a foil irradiated by a linearly polarized intense laser

 
Posted April 14, 2010
 

Dr. Hongbin Zhuo,
Associate Professor, National Laboratory for Parallel and Distributed Processing, School of Computer Science, National University of Defense Technology, Changsha, P. R. China
Time: 2:00pm, April 22, 2010
Place: Lecture Hall 111, Department of Physics
Title: GeV proton beams from a foil irradiated by a linearly polarized intense laser

Abstract: It is found that stable proton acceleration from a thin foil irradiated by a linearly-polarized ultra intense laser can be realized for appropriate foil thickness and laser intensity. A dual-peaked electrostatic field is formed around the foil surfaces. This field, due to the oscillating and non-oscillating components of the laser ponderomotive force, combines radiation pressure acceleration and the target sheath acceleration of ions. For laser intensities of ~5.510^24 W/cm^2, high-quality mono-energetic GeV proton beams with ~100 MeV energy spread, less than 4 degree spatial divergence, and ~50% energy conversion efficiency are obtained in two-dimensional particle-in-cell simulations.

 

   
 
 
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