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

Author

Wang, H.J. ; Xu, J.P.

Author_Institution

Mech. Eng. Div., Chinese Acad. of Sci., Shanghai, China

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

300

Lastpage

303

Abstract

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.

Keywords

biomedical imaging; computerised tomography; radiation therapy; superconducting coils; superconducting magnets; synchrotron radiation; wigglers; 21-pole superconducting wiggler magnet; K-edge subtraction; NbTi racetrack coils; SSRF; Shanghai Synchrotron Radiation Facility; biomedical application beamline; computed tomography; diffraction enhanced imaging; electron volt energy 20 keV to 120 keV; magnetic field design; magnetic flux density 4.05 T; microbeam radiation therapy; phase contrast imaging; storage ring; superconducting multipole wiggler; synchrotron photons; Magnetic field; multipole; superconducting wiggler;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2041544

Filename

5433292