2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85039In order to achieve a high quality, i. e. monoergetic, intense ion beam, we propose the use of a double layer target. The first layer, at the target front, consists of high-Z atoms, while the second (rear) layer is a thin coating of low-Z atoms. The high quality proton beams from the double layer target, irradiated by an ultra-intense laser pulse, are demonstrated with three dimensional Particle-in-Cell simulations.Plasma PhysicsAccelerator PhysicsComputational Physicstext