Multiple ionization of argon via xuv-photon absorption induced by 20-gigawatt high-harmonic pulses
arXiv:1806.05485 · doi:10.1103/PhysRevA.98.023426
Abstract
We report the observation of multiple ionization of Argon through multi-XUV-photon absorption induced by an unprecedentedly powerful laser driven high-harmonic-generation source. Comparing the measured intensity dependence of the yield of the different Argon charge states with numerical calculations we can infer the different channels -direct and sequential- underlying the interaction. While such studies were feasible so far only with FEL sources, this work connects highly-non-linear-XUV-processes with the ultra-short time scales, inherent to the harmonic pulses, and highlights the advanced perspectives of emerging large scale laser research infrastructures.
19 pages, 6 figures
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