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Title: Minimizing magnetic fields for precision experiments

An increasing number of measurements in fundamental and applied physics rely on magnetically shielded environments with sub nano-Tesla residual magnetic fields. State of the art magnetically shielded rooms (MSRs) consist of up to seven layers of high permeability materials in combination with highly conductive shields. Proper magnetic equilibration is crucial to obtain such low magnetic fields with small gradients in any MSR. Here, we report on a scheme to magnetically equilibrate MSRs with a 10 times reduced duration of the magnetic equilibration sequence and a significantly lower magnetic field with improved homogeneity. For the search of the neutron's electric dipole moment, our finding corresponds to a 40% improvement of the statistical reach of the measurement. However, this versatile procedure can improve the performance of any MSR for any application.
Authors:
; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Physikdepartment, Technische Universität München, D-85748 Garching (Germany)
  2. Rohrer GmbH, D-80667 München (Germany)
  3. IMEDCO AG, CH-4614 Hägendorf (Switzerland)
Publication Date:
OSTI Identifier:
22490707
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ELECTRIC DIPOLE MOMENTS; LAYERS; MAGNETIC FIELDS; MATERIALS; NEUTRONS; PERFORMANCE; PERMEABILITY; SHIELDS