The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements

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 2.92m, 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.

arXiv comment10 pages, 15 Figures, submitted to Review of Scientific Instruments

References in corpus (8)

• A magnetically shielded room with ultra low residual field and gradient
• A large-scale magnetic shield with 10^6 damping at mHz frequencies
• Minimizing magnetic fields for precision experiments
• Dynamic stabilization of the magnetic field surrounding the neutron electric dipole moment spectrometer at the Paul Scherrer Institute
• The design of the n2EDM experiment
• Magnetic field uniformity in neutron electric dipole moment experiments
• Neutron optics of the PSI ultracold neutron source: characterization and simulation
• A simple method of coil design

Cited by in corpus (2)

• Prospects for measuring the electron's electric dipole moment with polyatomic molecules in an optical lattice
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