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MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

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Published on: January 16, 2021

A polyvalent harmonic coil testing method for small-aperture magnets.

Pasquale Arpaia¹, Marco Buzio, Giancarlo Golluccio

¹Department of Engineering, University of Sannio, Corso Garibaldi 107, 82100 Benevento, Italy. arpaia@unisannio.it

The Review of Scientific Instruments

|September 4, 2012

Summary

This summary is machine-generated.

A novel harmonic coil technique precisely characterizes small-aperture permanent and pulsed magnets. This method ensures accurate multipole field component assessment for particle accelerators.

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Area of Science:

* Particle accelerator magnetometry
* Precision electromagnetic measurements

Background:

* Characterizing small-aperture magnets presents unique metrological challenges.
* Existing techniques may lack accuracy for precise field assessment in confined magnetic systems.

Purpose of the Study:

* To present an enhanced harmonic coil measurement technique for small-aperture magnets.
* To enable complete characterization of quadrupole magnets, including multipole components, magnetic axis, and field direction.
* To address inaccuracies in search-coil production and systematic effects in measurements.

Main Methods:

* Implementation of in situ calibration to correct for search-coil inaccuracies.
* Rotation of the magnet around its axis to eliminate systematic measurement errors.
* Utilization of stationary coils at various angular positions to measure magnetic fluxes for fast-pulsed magnets.

Main Results:

* Successful characterization of small-aperture permanent and fast-pulsed quadrupole magnets.
* Validation of the enhanced technique on magnets for the Linac4 accelerator at CERN.
* Demonstrated capability to assess multipole field components, magnetic axis position, and field direction accurately.

Conclusions:

* The enhanced harmonic coil method provides a robust solution for characterizing small-aperture magnets.
* This technique is crucial for ensuring the performance of magnets in particle accelerators.
* The validated method offers high precision for both permanent and pulsed magnet applications.