New technological solutions for the integration of electrical sensors in structural materials of test facilities are being developed on the basis of laser-based joining techniques. The background to this is the need to integrate electrode arrays for distributed and imaging electrical sensors into wall structures of pipes, containers, heating rods, etc. in a form that is as miniaturized as possible and resistant to pressure and temperature. For this purpose, ceramic and metallic materials are to be securely joined using laser-based joining techniques. This project addresses the selection of suitable ceramic and metallic materials with adapted thermal expansion coefficients, the joining of very small elements such as electrode/ferrule/tube wall for electrode systems, and the direct sputtering of metal onto ceramics and sapphire glass to produce structured electrodes and electrical leads. Alternatively, techniques are to be used in which sensors are embedded in substrate surfaces or contacts are fixed in surfaces by laser structuring with existing high-precision short-pulse lasers.

The objective is to enable the investigation of two-phase flow structures with up to 1 kHz frame rate in long pipes, such as standpipes (GENEVA), as well as parameter extraction for flow shape and vapor content. Finally, experimental investigations of two-phase instabilities in GENEVA will be performed.