Krása J, Velyhan A, Margarone D, Krouský E, Krouský L, Jungwirth K, Rohlena K, Ullschmied J, Parys P, Ryć L, Wołowski J. Shot-to-shot reproducibility in the emission of fast highly charged metal ions from a laser ion source.
Rev Sci Instrum 2012;
83:02B302. [PMID:
22380281 DOI:
10.1063/1.3655528]
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Abstract
The generation of fast highly charged metal ions with the use of the sub-nanosecond Prague Asterix Laser System, operated at a fundamental wavelength of 1315 nm, is reported. Particular attention is paid to shot-to-shot reproducibility in the ion emission. Au and Pd targets were exposed to intensities up to 5 × 10(16) W∕cm(2). Above the laser intensity threshold of ∼3 × 10(14) W∕cm(2) the plasma is generated in a form of irregular bursts. The maximum energy of protons constituting the leading edge of the fastest burst reaches a value up to 1 MeV. The fast ions in the following bursts have energy gradually decreasing with the increasing burst number, namely, from a value of about 0.5 MeV∕charge regardless of the atomic number and mass of the ionized species.
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