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Electron paramagnetic resonance magnetic field sensors for particle accelerators
Anthony Beaumont1, David Giloteaux1, Alessandro V Matheoud2
1CERN European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland.
The Review of Scientific Instruments
|November 3, 2020
Summary
We developed electron paramagnetic resonance sensors for precise dynamic magnetic field measurements. These sensors trigger real-time magnetic field systems at synchrotrons, offering high resolution for critical experiments.
Area of Science:
- Physics
- Electrical Engineering
- Materials Science
Background:
- Accurate dynamic magnetic field measurement is crucial for particle accelerators and scientific research.
- Existing systems require precise triggering to capture transient magnetic field events.
Purpose of the Study:
- To develop and characterize novel electron paramagnetic resonance (EPR) sensors for dynamic magnetic field measurements.
- To enable precise triggering of real-time magnetic field measurement systems (B-trains) at large synchrotron facilities.
Main Methods:
- Utilized grounded co-planar microwave resonators (1-3 GHz) on printed circuit boards.
- Employed single-chip integrated microwave oscillators (10-20 GHz) using complementary metal-oxide-semiconductor (CMOS) technology.
- Tested sensors for dynamic magnetic field measurements at 36 mT, 100 mT, 360 mT, and 710 mT.
Main Results:
- Achieved magnetic field resolution in the range of 0.1 nT/Hz1/2 to 6 nT/Hz1/2.
- Demonstrated sensor performance with field ramps up to 5 T/s and gradients up to 12 T/m.
- Characterized sensor behavior considering material anisotropy and temperature effects.
Conclusions:
- The developed EPR sensors provide precise triggering capabilities for dynamic magnetic field measurements.
- These sensors are suitable for integration with real-time magnetic field monitoring systems at synchrotron installations.
- The technology offers a significant advancement in high-resolution magnetic field sensing for demanding applications.
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