Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 66: Vacuum Science Technology: Theory and Applications

O 66.3: Talk

Wednesday, March 19, 2025, 16:00–16:15, H8

BeamPipes4ET: Innovative On-Site Production and Welding of the Einstein Telescope Vacuum Tubes — Charlotte Benning, •Robert Joppe, Oliver Pooth, and Achim Stahl — III. Physikalisches Institut B, RWTH Aachen

The Einstein Telescope will be the first gravitational wave detector of the third generation. It requires about 120 km of vacuum tubes with a diameter of 1 m to achieve the design sensitivity and reduce scattered light. BeamPipes4ET introduces an innovative production concept for vacuum pipes, incorporating a new welding technology and adapting existing flange and T-section production methods. This approach enhances reliability, significantly reduces labor, welding, and finishing efforts. By manufacturing pipes on-site from coils of sheet metal in a continuous process, transportation needs are minimized, and pipe connections are eliminated. Additionally, the project pioneers laser beam welding under mobile vacuum and transfers advanced pipe feature integration technologies to further streamline production.

This talk presents the current status and ongoing activities in the BeamPipes4ET project.

Keywords: Einstein Telescop; vacuum tubes; welding technology