The plasma generated from thin gold films irradiated in high vacuum at high intensity (similar to 10(15) W/cm(2)) laser shot is characterized in terms of ion generation through time-of-flight techniques and Thomson parabola spectrometry. Gold ions and protons, accelerated in forward direction by the electric field developed in non-equilibrium plasma, have been investigated. Measurements, performed at PALS laboratory, give information about the gold charge states distributions, the ion energy distributions and the proton acceleration driven as a function of film thickness, laser parameters, and angular emission. The ion diagnostics of produced plasma in forward direction permits to understand some mechanisms developed during its expansion kinetics. The role of the focal position of a laser beam with respect to the target surface, plasma properties, and the possibility to accelerate protons up to energies above 3 MeV has been presented and discussed. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793454]
Thomson parabola spectrometry for gold laser-generated plasmas
TORRISI, Lorenzo;Cutroneo, M.;
2013-01-01
Abstract
The plasma generated from thin gold films irradiated in high vacuum at high intensity (similar to 10(15) W/cm(2)) laser shot is characterized in terms of ion generation through time-of-flight techniques and Thomson parabola spectrometry. Gold ions and protons, accelerated in forward direction by the electric field developed in non-equilibrium plasma, have been investigated. Measurements, performed at PALS laboratory, give information about the gold charge states distributions, the ion energy distributions and the proton acceleration driven as a function of film thickness, laser parameters, and angular emission. The ion diagnostics of produced plasma in forward direction permits to understand some mechanisms developed during its expansion kinetics. The role of the focal position of a laser beam with respect to the target surface, plasma properties, and the possibility to accelerate protons up to energies above 3 MeV has been presented and discussed. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793454]Pubblicazioni consigliate
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