CryoSense: Redesign using alternative measurement methods

Kurzfassung

This Technical Note contains the design of a cryogenic benchmark experiment, introducing alternate measurement methods such as ultrasound tomography or electric capacitance tomography. The benchmark experiment is a redesign of baseline experiment 1 presented in Technical Note 1 of the activity, with state-of-the-art "conventional" sensor technologies now replaced by alternative measurement methods. In a comprehensive study different technologies are first described, then evaluated in terms of application potential and specifically adapted TRL scale. This includes: Ultrasound Tomography, Electrical Resistance Tomography, Electrical Capacitance Tomography, Optical Tomography, Time of Flight Cameras, Nuclear Magnetic Resonance Tomography, Wire-Mesh Sensors, Computed X-Ray Tomography and Neutron Absorption. The intended application in this Note is the detection of gas bubbles within cryogenic liquids. After assessment of parasitic heating, microgravity compatibility and cryogenic compatibility, trade-offs are performed between sensors of the same type. Recommendations regarding and increase in technology readiness level conclude the sensor study and lead to the presentation of the sensor layouts of the redesigned experiment. Finally, the sensor study recommendations are translated into an overview test matrix as a suggestion for a step-wise sensor validation.