SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 19: Detector Systems, Electronics
T 19.2: Vortrag
Montag, 20. März 2023, 16:45–17:00, POT/0106
Development of a quench detection system based on optical fibres for the AMS-100 high temperature superconducting solenoid. — •Clemens Dittmar1, Markus Gastens2, Caroline Girmen3, Stefan Schael1, Thorsten Siedenburg1, and Michael Wlochal1 — 1Physics Institute I B, RWTH Aachen, Germany — 2Institute of Structural Mechanics and Lightweight Design SLA, RWTH Aachen, Germany — 3Fraunhofer Institute for Production Technology IPT, Aachen, Germany
The magnetic spectrometer AMS-100, which includes a high temperature superconducting coil, is being designed to measure cosmic rays and detect cosmic antimatter in space. This extreme environment requires a suitable sensing solution to monitor critical changes in the solenoid structure, for example the beginning of a quench in the superconducting coil. Rayleigh scattering-based distributed optical fibre sensors (DOFS) fulfil the high requirements for these extreme conditions, as they are small and lightweight, can be used under cryogenic temperatures, are immune to electromagnetic interference and have sub-millimetre spatial resolution over long distances. The established application of using this system only allows a coupled measurement of mechanical and thermal signals, based on knowledge of the thermomechanical behaviour of the structure being measured. A precise calibration of the temperature and strain response of the optical fibre in the range of 77K to 350K was achieved and a measurement principle was developed to decouple the mechanical and thermal signals.