Realizing Laser-driven Deuteron Acceleration with Low Energy Spread via In-situ D2O-deposited Target

Abstract

Generation of quasi-monocenergic ion pulse by laser-driven acceleration is one of the hot topics in laser physics. In this study, we present a new method for the In-situ deposition of an ultra-thin D2O layer on the surface of an aluminum foil target utilizing a spherical D2O capsule. Employing a 10^19 W/cm2 laser, we achieve the acceleration of 10.8 MeV deuterons with an energy spread of DE/E = 4.6% in the most favorable shot. The energy spread depends on the exposure time of the D2O capsule in the vacuum chamber. This method has the advantage that it is simple in setup and operation and potential of extending the applicability to other ion species.journal articl