Approach towards quasi-monoenergetic laser ion acceleration with doped target

2014/02/21 by Toshimasa Morita · 2 citations
Physics and Astronomy · #physics.plasm-ph

paper · pdf · doi:10.1063/1.4876759

arxiv created 2014/02/21 · arxiv updated 2015/06/18

Abstract

Ion acceleration by using a laser pulse irradiating a disk target which includes hydrogen and carbon is examined using three-dimensional particle-in-cell simulations. It is shown that over 200 MeV protons can be generated by using a 620TW, 5×10²¹ W/cm² laser pulse. In a polyethylene (CH₂) target, protons and carbon ions separate and form two layers by radiation pressure acceleration. A strong Coulomb explosion in this situation and Coulomb repulsion between each layer generates high energy protons. A doped target, low density hydrogen within a carbon disk, becomes a double layer target which is comprised of a thin and low density hydrogen disk on the surface of a high-Z atom layer. This then generates a quasi-monoenergetic proton beam.

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