Göttingen 2025 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 10: Poster Session I

P 10.31: Poster

Dienstag, 1. April 2025, 16:15–18:15, ZHG Foyer 1. OG

Radiation emission from relativistic electron bunches interacting with plasma density gratings — •Sophie Opara and Götz Lehmann — Heinrich-Heine-Universität Düsseldorf

The interaction between high-intensity light waves and transient periodic density modulations of underdense plasma has been proven to be a fruitful concept for plasma-based optics in the context of high-power lasers. The plasma density gratings, driven by the ponderomotive force of overlapping laser pulses, can have substantial amplitudes, up to more than 100% in the nonlinear regime. The modulations then subsequently can act e.g. as Bragg-type mirror, polarizer or wave-plate for probe pulses of high intensity. Their holographic nature allows even to convert between different types of laser beams, e.g. from Gaussian to Gauss-Laguerre type. Even concepts for plasma-based pulse compressors for chirped-pulse amplification have been developed. The interaction of density modulated plasma with highly energetic particle beams on the other hand is less well studied, mostly in the context of beam transport through plasmas. In our present work we study the interaction of beams in strongly density modulated systems in the context of radiation generation.

Keywords: Laser-plasma interaction; particle beams; plasma density grating; coherent radiation source