A magnetically shielded room with ultra low residual field and gradient

I. Altarev; E. Babcock; D. BeckM. BurghoffS. ChesnevskayaT. ChuppS. DegenkolbI. FanP. FierlingerA. FreiE. GutsmiedlS. Knappe-GrunebergF. KuchlerT. LauerP. LinkT. LinsM. MarinoJ. McAndrewB. NiessenS. PaulG. PetzoldtU. SchlapferA. SchnabelS. SharmaJ. SinghR. StoeplerS. StuiberM. SturmB. TaubenheimL. TrahmsJ. VoigtT. Zechlau

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A magnetically shielded room with ultra low residual field and gradient

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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.

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《Review of Scientific Instruments》 |2014年第7期|075106-1-075106-8|共8页
作者
I. Altarev; E. Babcock; D. BeckM. BurghoffS. ChesnevskayaT. ChuppS. DegenkolbI. FanP. FierlingerA. FreiE. GutsmiedlS. Knappe-GrunebergF. KuchlerT. LauerP. LinkT. LinsM. MarinoJ. McAndrewB. NiessenS. PaulG. PetzoldtU. SchlapferA. SchnabelS. SharmaJ. SinghR. StoeplerS. StuiberM. SturmB. TaubenheimL. TrahmsJ. VoigtT. Zechlau;
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Forschungneutronenquelle Heinz Meier-Leibnitz, D-85748 Garching, Germany;

Physikalisch-Technische Bundesanstalt Berlin, D-10587 Berlin, Germany;

Physikdepartment, Technische Universitat Munchen, D-85748 Garching, Germany, and Fierlinger Magnetics GmbH, D-85748 Garching, GermanyPhysikdepartment, Technische Universitat Munchen, D-85748 Garching, GermanyJulich Center for Neutron Science, Lichtenbergstrasse 1, D-85748 Garching, GermanyPhysics Department, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USAPhysics Department, University of Michigan, Ann Arbor, Michigan 48109, USAIMEDCO AG, CH-4614 Hagendorf, Switzerland;

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A magnetically shielded room with ultra low residual field and gradient

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