Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 77: Poster Vacuum Science Technology: Theory and Applications

O 77.2: Poster

Wednesday, March 19, 2025, 18:00–20:00, P2

Investigating Nanoscale Hydrophobic Polymer Coatings for the use in the Einstein Telescope — •Maike Kühler, Achim Stahl, Charlotte Benning, and Oliver Pooth — III. Physikalisches Institut B, RWTH Aachen

With 120 km pipes of 1m diameter, the ultra-high vacuum (UHV) system of the Einstein Telescope is going to be one of the largest vacuum systems in existence. It will need an enormous input of innovation and optimization. This work explores superhydrophobic coatings for the vacuum chambers of the Einstein Telescope. Hoping to achieve faster pumpdown times and eventually lower bake out temperatures to reach sufficient pressure regimes. This poster presents a coating based on reactive silyl anchor units and functionalised with a long perfluoropolyether/organofluorine chain. The coating has been investigated for its performance and compatibility with UHV conditions. Its compatibility with the vacuum system of the Einstein Telescope was evaluated through molecular flow simulations.

Keywords: UHV; High Vacuum; Hydrophobic Coatings; Outgassing; Einstein Telescope