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Updated: Jul 16, 2025
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
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Development of SQUID detection technology for a superconducting gravimeter.
1Mechanical Metrology Group, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, South Korea.
The Review of Scientific Instruments
|September 22, 2023
Summary
This study introduces a new Superconducting QUantum Interference Device (SQUID) based superconducting gravimeter (SSG) for precise, real-time gravity measurements. Preliminary results show its potential for accurate earth tidal measurements, validated against absolute gravimeters.
Area of Science:
- Geophysics
- Quantum Metrology
- Instrumentation
Background:
- Precise gravity measurements are crucial for various scientific disciplines.
- Existing gravimeters have limitations in real-time data acquisition and sensitivity.
- Superconducting Quantum Interference Devices (SQUIDs) offer high sensitivity for detecting minute changes.
Purpose of the Study:
- To develop and evaluate SQUID detection technology for a superconducting gravimeter (SG).
- To achieve precise, real-time gravity measurements.
- To assess the performance of the novel SQUID-based superconducting gravimeter (SSG).
Main Methods:
- Designed and constructed a SQUID-based superconducting gravimeter (SSG) with optimized internal components.
- Utilized persistent mode current in a levitation coil to suspend a proof mass via electromagnetic force.
- Monitored changes in coil inductance to determine the proof mass equilibrium position.
- Conducted preliminary earth tidal measurements.
Main Results:
- Demonstrated the levitation of a proof mass using electromagnetic force and SQUID detection.
- Obtained preliminary experimental data for earth tidal measurements.
- Compared SSG results with an absolute gravimeter (FG5X) and theoretical calculations.
- Showcased the potential of the new gravity measurement technology.
Conclusions:
- The developed SQUID detection technology is suitable for superconducting gravimeters.
- The SQUID-based superconducting gravimeter (SSG) shows promise for precise, real-time gravity monitoring.
- The technology has been validated through earth tidal measurements and comparisons with established methods.
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