High-quality ion beams by irradiating a nano-structured target with a petawatt laser pulse

Details High-quality ion beams by irradiating a nano-structured target with a petawatt laser pulse High-quality ion beams by irradiating a nano-structured target with a petawatt laser pulse

2009-06-22

arxiv.org/abs/0906.3972v2

New J.Phys.11:093035,2009

Physics

Plasma Physics

18 pages, 7 figures, accepted in New. J. Phys

Scientific paper

10.1088/1367-2630/11/9/093035

We present a novel laser based ion acceleration scheme, where a petawatt circularly polarized laser pulse is shot on an ultra-thin (nano-scale) double-layer target. Our scheme allows the production of high-quality light ion beams with both energy and angular dispersion controllable by the target properties. We show that extraction of all electrons from the target by radiation pressure can lead to a very effective two step acceleration process for light ions if the target is designed correctly. Relativistic protons should be obtainable with pulse powers of a few petawatt. Careful analytical modeling yields estimates for characteristic beam parameters and requirements on the laser pulse quality, in excellent agreement with one and two-dimensional Particle-in Cell simulations.

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