| Zugriffsnummer | 56799 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Rapid degaussing for highly sensitive magnetometers: A case study of the Kiel Magnetically Shielded Room (KMSR) |
| Autor(in); Institution |
Schütt, J.; Kiel-University, Kiel, GERMANY
Arbustini, J.; Kiel-University, Kiel, GERMANY
Höft, M.; Kiel-University, Kiel, GERMANY
|
| Quelle/Jahr | Proceedings of the Workshop Biosignale 2026:(2026), 53 - 55 |
| ISBN | 978-3-99106-194-6 (online) |
| DOI | |
| Verlag | Innsbruck: Univ. Press |
| Konferenzangaben | Workshop Biosignale 2026, Innsbruck, 25-27, February, 2026, Austria |
| Freie Schlagworte | Magnetically Shielded Room ; Degaussing ; Mu-Metall ; Magnetometers ; Biomagnetism ; Magnetic Fields ; Hysteresis, Fluxgate ; Optically Pumped Magnetometers |
| Zusammenfassung | With the commercialization of Spin-Exchange-Relaxation-Free Optically Pumped Magnetometers (SERFOPMs), OPMs have emerged as a non-cryogenic alternative to Superconducting Quantum Interference Devices (SQUIDs) owing to their compactness and flexibility. However, maximizing SERFOPM potential requires low residual fields and minimal gradients, necessitating a high-performance Magnetically Shielded Room (MSR). Since the shielding material (Mu-metal) of an MSR exhibits hysteretic behavior, a well-controlled degaussing procedure is required to return the material to a low-remanence state. This work presents the initial quantitative assessment of the degaussing performance of the Kiel MSR (KMSR) using two strategies for driving the built-in degaussing coils. In the first, degaussing is performed using a manually controlled 50Hz rotary transformer supplied by the MSR manufacturer. In the second, a semi-automated approach is employed, leveraging additional hardware. The manual approach yields residual fields of 11nT within the central 1m³ volume, with pronounced spatial gradients and poor run-to-run reproducibility. The other approach reduces the residual magnitude to 4.7nT and achieves a minimal field at the MSR center below 0.4nT. This approach, with a degaussing time of under 4 minutes, provides a low, stable environment for SERF-OPMs and offers a practical route to lowcost, fast, and user-friendly upgrades for existing MSRs with integrated coils. |
| Kostenfreier Zugang | Freier Zugang |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Metrologie in der Medizin |
Zitierung
Schütt, J., Elzenheimer, E., Schnabel, A., Arbustini, J., Matz, H., Voigt, J., Radon, P., & Höft, M. (2026). Rapid degaussing for highly sensitive magnetometers: A case study of the Kiel Magnetically Shielded Room (KMSR). Workshop Biosignale 2026, Innsbruck, 25-27, February, 2026, Austria. https://doi.org/10.15203/99106-194-6-13