Work

Fast Degaussing Procedure for a Magnetically Shielded Room

Year: 2024

Type: article

Abstract: A demagnetization study was conducted on a magnetically shielded room (MSR) at Fraunhofer IPM, designed for applications such as magnetoencephalography (MEG) and material testing. With a composite of two layers of mu-metal and an intermediate aluminum layer, the MSR must provide a residual field under 5 nT for the successful operation of optically pumped magnetometers (OPMs). The degaussing process, employing six individual coils, reached the necessary residual magnetic field within the central 1 m3 volume in under four minutes. Due to the low-frequency shielding factor of 100, the obtained average residual field is shown to be limited by environmental residual field changes after degaussing and not by the degaussing procedure.

Source: Materials

DOI: 10.3390/ma17235877

Authors: Peter A. Koss, Jens Voigt, Ronja Rasser, Allard Schnabel

Institutions: Fraunhofer Institute for Physical Measurement Techniques, Physikalisch-Technische Bundesanstalt

Language: English

Topic: Atomic and Subatomic Physics Research

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,955

Funder: Fraunhofer-Gesellschaft