期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 85, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4886146
关键词
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资金
- DFG Priority Program SPP [1491]
- DFG Cluster of Excellence Origin and Structure of the Universe
- U.S. National Science Foundation [PHY1205671]
- DOE [DE FG02 04 ER41331]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205393] Funding Source: National Science Foundation
A versatile and portable magnetically shielded room with a field of (700 +/- 200) pT within a central volume of 1 m x 1 m x 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. (C) 2014 AIP Publishing LLC.
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