Abstract
A nanosecond pulsed Nd:YAG laser operating at the fundamental wavelength of 1064 nm and at an intensity of about 1010 W/cm2 was employed to irradiate hydrogenated polymers in vacuum. The produced plasma was characterized in terms of thermal and Coulomb interactions evaluating the equivalent temperature and the acceleration voltage developed in the non-equilibrium plasma core. Particles emission along the normal to the target surface was investigated by measuring, with the Hiden EQP 300 mass quadrupole spectrometer, ion energy distributions and fitting experimental data with the “Coulomb-Boltzmann-shifted” function. Time-of-flight technique was employed in order to measure the proton energy and yield. A comparison between experimental results is presented and discussed, with a special regard to the protons emission.
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Caridi, F. A mass quadrupole spectrometry investigation on proton emission by nanosecond laser ablation. Plasma Phys. Rep. 41, 147–153 (2015). https://doi.org/10.1134/S1063780X15020026
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DOI: https://doi.org/10.1134/S1063780X15020026