Collimated proton beam from an ultra-intense laser pulse irradiating parallel to the plasma interface

Collimated proton beam from an ultra-intense laser pulse irradiating parallel to the plasma interface

Blog Article

Recently, there has been some works on surface plasma waves excited by a laser obliquely irradiating on a thin foil target, which can cause stronger target normal sheath acceleration superdry baseball top of protons but cannot be excited by a grazing incidence laser.Here, we demonstrate that a large amplitude Interface Plasma Wave (IPW) can be excited by a relativistic laser pulse irradiating parallel (or grazing incidence) to the interface of a solid aluminum and low density hydrogen layer.This IPW here markedly enhances the sheath electric field to accelerate protons and reduce reflection of the laser pulse to improve the coupling efficiency.As a result, a collimated high energetic and lower energy spread proton beam can be efficiently achieved.