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Updated: Aug 6, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Development of a high-performance permanent magnet system for ion trapping experiments
Jifei Wu1,2, Jiawei Wang1,2, Tianhang Zhang1,2
1Institute of Modern Physics, Fudan University, Shanghai 200433, China.
Abstract:
This work presents the design and fabrication of a compact permanent magnet based on an optimized stacked structure of fifteen NdFeB rings. The tunable NS-SN-NS configuration generates a central magnetic field of 0.8 T with a reconstructed uniformity of 99.988% within a 1 mm radius spherical volume. The remaining field inhomogeneity is dominated by radial dipole components. Requiring neither cryogenics nor external power, this design provides a high-performance and cost-effective alternative to superconducting magnets for applications in ion-trap development and Fourier-transform ion cyclotron resonance mass spectrometry.
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