SMuK 2023 – scientific programme

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P: Fachverband Plasmaphysik

P 13: Laser Plasmas I

P 13.7: Talk

Thursday, March 23, 2023, 12:45–13:00, CHE/0089

K-alpha yield from laser-plasmas on thin layers — •Nico Potzkai and Georg Pretzler — Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf

When intense sub 10-fs laser pulses create plasma on solid surfaces, they accelerate electrons into the vacuum as well as into the target. The latter electrons induce characteristic x-rays in the material, most of all characteristic K_α radiation, which constitutes a source of partly coherent x-rays due to the small source and narrow spectral line width. When optimizing the total radiation output of this source, we found that thin layers of aluminum on top of copper emit more K_α photons than expected. In our contribution, we present our experimental results and calculations describing this effect.