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Updated: Sep 13, 2025
07:01
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
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Imaging of non-ideal leakage from electromagnetic shielding components using quantum magnetometry
Optics Express
|July 30, 2025
Summary
Nitrogen-vacancy (NV) centers in diamond mapped magnetic leakage fields from shielding components. This novel method achieved self-traceable calibration and characterized coaxial cable fields, advancing shielding design.
Area of Science:
- Quantum sensing
- Materials science
- Electromagnetics
Background:
- Electromagnetic shielding is crucial for device integrity.
- Characterizing leakage fields is essential for improving shielding effectiveness.
- Existing methods for magnetic field mapping have limitations.
Purpose of the Study:
- To develop a novel method for mapping magnetic leakage fields using nitrogen-vacancy (NV) centers in diamond.
- To achieve self-traceable magnetic field calibration without external references.
- To characterize the leakage field of an RG316 coaxial cable.
Main Methods:
- Utilized nitrogen-vacancy (NV) center ensembles in diamond for magnetic field sensing.
- Employed a phase accumulation method for self-traceable magnetic field calibration.
- Implemented synchronous current excitation to analyze the RG316 coaxial cable.
Main Results:
- Successfully mapped leakage magnetic fields from electromagnetic shielding components.
- Achieved self-traceable magnetic field calibration.
- Characterized the leakage field of an RG316 coaxial cable, revealing μT-level field strength.
- Demonstrated a system bandwidth of 70 kHz to 3.2 MHz with a spatial resolution of 278 μm.
Conclusions:
- Introduced a novel tool for defect characterization and leakage detection.
- Provided valuable data for enhancing shielding material and structural design.
- Demonstrated the potential of NV centers for precise magnetic field metrology.
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