We report on experimental investigations of proton acceleration from thin foil targets irradiated with ultra-short (similar to 50 fs), high contrast (similar to 10(10)) and ultra-intense (up to 10(21) W/cm(2)) 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 10(20) W/cm(2) 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.
|Number of pages||3|
|Journal||Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 11 Oct 2011|
- laser plasma interaction
- proton acceleration
- ion detectors