Journal of the Korean Magnetic Resonance Society (한국자기공명학회논문지)

Korean Magnetic Resonance Society (한국자기공명학회)
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Magnetic Field Standards Using Magnetic Resonance

  • Park, Po Gyu (Center for Electricity and Magnetism, Korea Research Institute of Standards and Science) ;
  • Kim, Wan-Seop (Center for Electricity and Magnetism, Korea Research Institute of Standards and Science) ;
  • Joo, Sung Jung (Center for Electricity and Magnetism, Korea Research Institute of Standards and Science) ;
  • Lee, Hyung Kew (Center for Electricity and Magnetism, Korea Research Institute of Standards and Science)
  • Received : 2017.01.18
  • Accepted : 2017.03.05
  • Published : 2017.03.20
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Abstract

The nuclear magnetic resonance (NMR) and atomic magnetic resonance (AMR) plays a fundamental role in achieving a high accuracy of magnetic field measurements. Magnetic field unit (T) was realized based on the shielded proton gyromagnetic ratio (${\gamma}^{\prime}_P$), helium-4 gyromagnetic ratio (${\gamma}_{4He}$) and related techniques. The magnetic field standard system has been disseminated by the NMR magnetometer and electromagnet, a Helmholtz coil system, and AMR magnetometer in the nonmagnetic laboratory. A magnetic field standard below 1 mT has been developed by using Cs and Cs- $^4He$ AMR with automatic compensation of an external magnetic field noise. The standards serve for the calibration of magnetometers and support the test of sensors and materials in the range from $5{\mu}T$ to 2.0 T with (1 to 50) ${\mu}T/T$ uncertainty (k=2).

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References

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