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Q: Fachverband Quantenoptik und Photonik

Q 7: Precision Measurements

Q 7.10: Poster

Dienstag, 21. September 2021, 16:30–18:30, P

Characterizing the sensitivity levels of a shadow sensor - working towards a cryo-compatible sensor — •Vivek Pimpalshende, Markus Bachlechner, Matthias Bovelett, Thomas Hebbeker, Robert Joppe, Tim Kuhlbusch, Oliver Pooth, Achim Stahl, Jan Wirtz, and Franz-Peter Zantis — RWTH Aachen University, Aachen, Germany

The Einstein Telescope will be the first gravitational wave detector of the third generation. The sensitivity goal, especially in the low-frequency region, will be achieved among other improvements by cooling the main parts of the interferometer. Thus, the required electronic components, sensors, and actuators needed for mirror alignment and active damping of suspension resonances have to perform at cryogenic temperatures. In a shadow sensor, the displacement of a flag is measured from its shadow cast onto a photodiode. In this poster, we will present our work on the characterization of the noise level of a shadow sensor. Understanding the noise sources is crucial to improve the sensitivity, which is essential to design an efficient cryo-compatible sensor.