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Proton acceleration using 50 fs, high intensity ASTRA-Gemini laser pulses |
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| Authors: | R Prasad S Ter-AvetisyanD Doria KE QuinnL Romagnani PS Foster CM Brenner JS GreenP Gallegos MJV Streeter DC CarrollO Tresca NP DoverCAJ Palmer J SchreiberD Neely Z NajmudinP McKenna M ZepfM Borghesi |
| Affiliation: | a School of Mathematics and Physics, Queen's University Belfast, Belfast, UK b CLF, Rutherford Appleton Laboratory, STFC, Oxfordshire, UK c SUPA, Department of Physics, University of Strathclyde, Glasgow, UK d The Blackett Laboratory, Imperial College, London, UK |
| Abstract: | We report on experimental investigations of proton acceleration from thin foil targets irradiated with ultra-short (∼50 fs), high contrast (∼1010) and ultra-intense (up to 1021 W/cm2) laser pulses. These measurements provided for the first time the opportunity to extend the scaling laws for the acceleration process in the ultra-short regime beyond the 1020 W/cm2 threshold. The scaling of accelerated proton energies was investigated by varying the thickness of Al targets (down to 50 nm) under 35° angle of laser incidence and with p-polarised light. |
| Keywords: | Laser plasma interaction Proton acceleration Ion detectors |
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