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Magnetic Field Design of a Superconducting Multipole Wiggler for Imaging and Biomedical Application Beamline

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2 Author(s)
H. J. Wang ; Mechanical Engineer Division, Shanghai Institute of Applied Physics Chinese Academy of Sciences, Shanghai, China ; J. P. Xu

A 21-pole superconducting wiggler magnet was designed for medical imaging beamline at Shanghai Synchrotron Radiation Facility (SSRF). The superconducting magnet consists of 21 pairs of NbTi racetrack coils with a period length of 140 mm, and can produce a central peak field of 4.05 T at a pole gap of 22 mm. The critical energy is 33 keV for 3.5 GeV storage ring and the energy of synchrotron photons from wiggler can cover a range from 20 keV to 120 keV for imaging method of K-edge subtraction, diffraction enhanced imaging, phase contrast, computed tomography and microbeam radiation therapy. This paper focuses on the magnetic field design.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:20 ,  Issue: 3 )