Nature Communications paper
A-SAIL researchers including Paul McKenna, David Neely and Marco Borghesi have recently published a paper in Nature Communications, entitled "Near-100 MeV protons via a laser-driven transparency-enhanced hybrid acceleration scheme".
The authors report on an experimental demonstration of efficient proton acceleration to energies exceeding 94 MeV via a hybrid scheme of radiation pressure-sheath acceleration in an ultrathin foil irradiated by a linearly polarised laser pulse. This occurs via a double-peaked electrostatic field structure, which, at an optimum foil thickness, is significantly enhanced by relativistic transparency and an associated jet of super-thermal electrons. The range of parameters over which this hybrid scenario occurs is discussed in the paper, and implications for ion acceleration driven by next-generation, multi-petawatt laser facilities are explored.
The paper is available here.