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Title: A magnetically shielded room with ultra low residual field and gradient

A versatile and portable magnetically shielded room with a field of (700 ± 200) pT within a central volume of 1 m × 1 m × 1 m and a field gradient less than 300 pT/m, achieved without any external field stabilization or compensation, is described. This performance represents more than a hundredfold improvement of the state of the art for a two-layer magnetic shield and provides an environment suitable for a next generation of precision experiments in fundamental physics at low energies; in particular, searches for electric dipole moments of fundamental systems and tests of Lorentz-invariance based on spin-precession experiments. Studies of the residual fields and their sources enable improved design of future ultra-low gradient environments and experimental apparatus. This has implications for developments of magnetometry beyond the femto-Tesla scale in, for example, biomagnetism, geosciences, and security applications and in general low-field nuclear magnetic resonance (NMR) measurements.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ; ;  [3] ; ;  [4] more »; « less
  1. Physikdepartment, Technische Universität München, D-85748 Garching (Germany)
  2. Jülich Center for Neutron Science, Lichtenbergstrasse 1, D-85748 Garching (Germany)
  3. Physics Department, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
  4. Physikalisch-Technische Bundesanstalt Berlin, D-10587 Berlin (Germany)
Publication Date:
OSTI Identifier:
22308691
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; DESIGN; ELECTRIC DIPOLE MOMENTS; LORENTZ INVARIANCE; MAGNETIC FIELDS; MAGNETOMETERS; MEASURING METHODS; NUCLEAR MAGNETIC RESONANCE; PRECESSION; SHIELDS; SPIN; STABILIZATION