Bonn 2025 – scientific programme

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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 6: Poster

K 6.11: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Debris Detection and Mitigation for Laser-Produced Plasma X-ray Sources — •Greta Paruschke, Lion Günster, Luka Petersen, Jose Mapa, Philip Mosel, Sven Fröhlich, Andrea Trabattoni, Uwe Morgner, and Milutin Kovacev — Leibniz Universität Hannover, Hannover, Germany

Laser produced plasmas (LPP) can produce large amounts of X-rays. X-ray sources from metal based LPPs have several advantages e.g. a high flux and small source point. However, in Laser-based X-ray sources debris production leads to limitations of the performance by degrading components in the proximity of the interaction area. This is unavoidable making efficient debris shielding necessary.

Debris particles come in the form of vapor, ions, dust, and high-speed particles as unwanted byproducts of the plasma that degrade the surface of optics, resulting in lower reflectivity and potential damages on the optic. Mitigation techniques differ depending on the debris composition and source geometry, making each source unique. To fully use the benefits of LPP sources, choosing the appropriate shielding is essential to minimize the degradation of the focusing optics and maintain a high photon flux.

Here we investigate methods to evaluate the composition of debris from our LPP source regarding its particle size and speed distribution. Furthermore, approaches for debris mitigation are presented and evaluated.

Keywords: Plasma; Debris; X-ray; Optics; Laser