The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements
Journal
Review of Scientific Instruments
Journal Volume
93
Journal Issue
9
Start Page
095105
ISSN
0034-6748
1089-7623
Date Issued
2022-09-01
Author(s)
Abstract
We present the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute, which features an interior cubic volume with each side of length 2.92 m, thus providing an accessible space of 25 m3. The MSR has 87 openings of diameter up to 220 mm for operating the experimental apparatus inside and an intermediate space between the layers for housing sensitive signal processing electronics. The characterization measurements show a remanent magnetic field in the central 1 m3 below 100 pT and a field below 600 pT in the entire inner volume, up to 4 cm to the walls. The quasi-static shielding factor at 0.01 Hz measured with a sinusoidal 2 μT peak-to-peak signal is about 100 000 in all three spatial directions and increases rapidly with frequency to reach 108 above 1 Hz.
SDGs
Publisher
AIP Publishing
Type
journal article