Mainz 2022 – scientific programme

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P: Fachverband Plasmaphysik

P 19: Poster II

P 19.41: Poster

Thursday, March 31, 2022, 16:00–17:30, P

Ion spectroscopy of ultrashort laser pulse plasmas ignited by pre-pulses — •Lars Schwabe, Jan Riedlinger, and Georg Pretzler — Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf

Illuminating solids with a high-intensity sub-10-fs laser creates a short-lived high-temperature plasma. The detailed processes during plasma generation are still not fully predictable today. We examined the emitted ions in terms of reached ionization states, probability and kinetic energy distribution, using a Thomson parabola spectrometer with an increased dynamic range to map ions with energies in the sub-100-keV range. Experiments were done with systematically varied laser parameters and pre-pulses, with peak intensities up to 10¹⁸ W/cm² at pulse durations down to 7 fs. The results allow conclusions on the plasma formation processes and the subsequent ionization dynamics in this ultrashort sub-120-fs domain.