Using the PALS iodine laser system, Au ions with the charge state up to 58+ and with the kinetic energy as high as ~300 MeV were generated. The production of these ions was tested in dependence on the laser frequency (1ω, 3ω), on the irradiation/detection angles (0°, 30°), on the focus position with regard to the target surface, and on the target thickness (500 µm, 200 µm, 80 µm). A larger amount of the fastest ions was produced with 1ω than with 3ω, the most of the fast ions were recorded in the direction ~10° from the target normal, the optimum focus position is in front of the target and should be set on with a precision of 50 µm. The forward emission is weaker than the backward one for both of the thinner targets (which burn through) at our experimental conditions.
L. Láska, J. Krása, A. Velyhan, K. Jungwirth, E. Krouský, D. Margarone, M. Pfeifer, K. Rohlena, L. Ryc, J. Skála, L. Torrisi, J. Ullschmied
Experimental studies of generation of similar to 100 MeV Au-ions from the laser-produced plasma
Laser Part. Beams 27 (2009) 137 - 147, doi: 10.1017/S0263034609000202
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