• Title/Summary/Keyword: Magnetic Resonance

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Magnetic Field Standards Using Magnetic Resonance

  • Park, Po Gyu;Kim, Wan-Seop;Joo, Sung Jung;Lee, Hyung Kew
    • Journal of the Korean Magnetic Resonance Society
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    • v.21 no.1
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    • pp.7-12
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    • 2017

  • 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).

  • https://doi.org/10.6564/JKMRS.2017.21.1.07 인용 PDF KSCI