Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Near-100 MeV protons via a laser-driven transparency-enhanced hybrid acceleration

Sep 18, 2019, 12:10 PM
SML (Hotel Hermitage)


Hotel Hermitage

talk Invited Plenary Talk Plenary Session 6


Ross Gray (University of Strathclyde)


The range of potential applications of compact laser-plasma ion sources motivates the development of new acceleration schemes to increase achievable ion energies and conversion efficiencies. Whilst the evolving nature of laser-plasma interactions can limit the effectiveness of individual acceleration mechanisms, it can also enable the development of hybrid schemes, allowing additional degrees of control on the properties of the resulting ion beam. We report on the 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 reported, as are new routes to its optimisation and control.

Primary author

Ross Gray (University of Strathclyde)


Dr Adam Higginson (University of Strathclyde) Dr Martin King (University of Strathclyde) Mr Sammuel Williamson (University of Strathclyde) Dr Robbie Wilson (University of Strathclyde) Mr Christopher Armstrong (Central Laser Facility) Dr Remi Capdessus (University of Strathclyde) Dr James Green (Central Laser Facility ) Mr Steve Hawkes (Central Laser Facility ) Mr Philip Martin (Queens University Belfast ) Dr Xiaohui Yuan (Shanghai Jiao Tong University ) Dr Seyed Reza Mirfayzi (Queens University Belfast) Mr Satyabrata Kar (Queens University Belfast ) Prof. Marco Borghesi (Queens University Belfast) Mr Robert Clarke (Central Laser Facility ) Prof. David Neely (Central Laser Facility ) Prof. Paul McKenna (University of Strathclyde )

Presentation materials