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Updated: Feb 9, 2026
10:26
Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
11.9K
Magnetometric mapping of superconducting RF cavities
B Schmitz1, J Köszegi1, K Alomari1
1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
The Review of Scientific Instruments
|June 6, 2018
Summary
A new system maps superconducting RF cavities using temperature and magnetic fields. This enables detailed studies of superconducting properties and phenomena like quenches.
Area of Science:
- Applied Physics
- Materials Science
- Superconductivity
Background:
- Superconducting Radio Frequency (SRF) cavities are crucial for particle accelerators.
- Understanding dynamic effects impacting superconducting properties is essential for cavity performance.
- Current mapping techniques often lack integrated magnetic field measurements.
Purpose of the Study:
- To present a scalable mapping system for SRF cavities.
- To integrate local temperature measurement with 3D magnetic field mapping.
- To enable detailed studies of phenomena affecting superconducting properties.
Main Methods:
- Developed a system combining temperature sensors and anisotropic magnetoresistance-based magnetic field sensors.
- Implemented a data acquisition rate of 500 Hz for simultaneous channel mapping.
- Tested the system on a 1.3 GHz TESLA-type SRF cavity.
Main Results:
- Achieved a magnetic field resolution of 17 nT.
- Demonstrated the system's scalability to different cavity types.
- Presented successful combined temperature and magnetic-field maps.
- Showed anisotropic magnetoresistance sensors perform well in cryogenic environments.
Conclusions:
- The integrated mapping system provides new capabilities for SRF cavity research.
- It allows for detailed studies of trapped magnetic flux and its impact on surface resistance.
- The system facilitates observation of dynamic effects like phase transitions and quenches.
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