SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 13: Highly Charged Ions and their Applications I

A 13.2: Talk

Wednesday, March 8, 2023, 11:30–11:45, F107

Scaling relations for hydrogen-like ions in intense laser fields in the quasi-static regime — •Anvar Khujakulov and Alejandro Saenz — Newtonstraße 15, 12489 Berlin

With the availability of light sources with extreme intensities, the understanding of the behaviour of matter exposed to such light fields is of great interest. The full solution of the time-dependent Dirac equation is, however, even for the simlest system, hydrogen-like ions exposed to such light sources, prohibitively difficult. On the other hand, for highly charged ions even when exposed to intense x-rays, ionization usually occurs in the so-called quasi-static regime where the initially bound electron follows adiabatically the time variation of the electric-field component. Therefore, a systematic investigation of the ionization behaviour in the static limit was performed. Approximate scaling relations were found that allow for the prediction of the ionization rate of a highly charged ion exposed to an intense field based on the results of a lighter ion exposed to a weak field. Most importanly, a scaling relation is found that allows for obtaining results in very good agreement with the Dirac equation from the solution of a scaled Schröodinger-equation. The results should be useful for plasma simulations, the design of experiments, the isolation of relativistic effects, or the calibration of light sources with extreme peak intensities.