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 2.92m, thus providing an accessible space of 25m3. The MSR has 87 openings up to 220mm diameter to operate the experimental apparatus inside, and an intermediate space between the layers for sensitive signal processing electronics. The characterization measurements show a remanent magnetic field in the central 1m3 below 100pT, and a field below 600pT 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 2muT peak-to-peak signal is about 100,000 in all three spatial directions and rises fast with frequency to reach 10^8 above 1Hz.
@article{arxiv.2206.10714,
title = {The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements},
author = {N. J. Ayres and G. Ban and G. Bison and K. Bodek and V. Bondar and T. Bouillaud and B. Clement and E. Chanel and P. -J. Chiu and C. B. Crawford and M. Daum and C. B. Doorenbos and S. Emmenegger and A. Fratangelo and M. Fertl and W. C. Griffith and Z. D. Grujic and P. G. Harris and K. Kirch and J. Krempel and B. Lauss and T. Lefort and O. Naviliat-Cuncic and D. Pais and F. M. Piegsa and G. Pignol and G. Rauscher and D. Rebreyend and I. Rienäcker and D. Ries and S. Roccia and D. Rozpedzik and W. Saenz-Arevalo and P. Schmidt-Wellenburg and A. Schnabel and N. Severijns and B. Shen and M. Staab and K. Svirina and R. Tavakoli Dinani and J. Thorne and N. Yazdandoost and J. Zejma and G. Zsigmond},
journal= {arXiv preprint arXiv:2206.10714},
year = {2022}
}
Comments
10 pages, 15 Figures, submitted to Review of Scientific Instruments