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Studies of MeV Fast Protons Produced in Laser Fusion Experiments

Enhanced laser-induced acceleration of fast protons up to > 1 MeV has been observed on the 60-beam, 30-kJ OMEGA laser at intensities of 10 Wcm . These energies are more than 5 times greater than previously observed on single-beam experiments at equivalent intensities. The total energy in these protons is 0:1 % of the laser energy and inferred hot electron temperatures are 10 { 20 keV. High-resolution spectroscopy has detected proton spectra with intense, regular lines.