Design of a 2.3 T rotating permanent dipole magnet

Author

Wang, Z. ; Yang, W. ; Song, T. ; Xiao, L.

Author_Institution

Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing, China

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1264

Lastpage

1266

Abstract

This paper introduces the design of a high magnetic field permanent magnet for Magnetic Birefringence of Vacuum-Q&A Experiment. The magnet is required to have 2.2T maximum magnetic-flux density on the axis of the columnar air-gap (diameter: 27 mm, length: 600 mm) and not more than 0.00001 T magnetic flux leakage at 10 mm away from the round surface of the magnet. Also the magnet should rotate at 10 Hz driven by a motor. All of these requirements have been satisfied. Furthermore, a maximum 2.3 T on the axis of columnar air-gap is reached. The higher magnetic field is reached in two aspects, material and structure. High performance materials, 1J22 and N42M, were adopted and a special structure is designed to shield the leakage flux. Further improvement on this magnet can be achieved with the adoption of more advanced materials.

Keywords

magnetic fields; magnetic flux; magnetic leakage; magnetic shielding; permanent magnets; 10 Hz; 1J22; 2.3 T; 27 mm; 600 mm; FEM; N42M; columnar air-gap; high magnetic field permanent magnet; high performance materials; leakage flux shielding; magnetic birefringence; magnetic flux leakage; magnetic-flux density; rotating permanent dipole magnet; Air gaps; Birefringence; Magnetic fields; Magnetic flux; Magnetic flux leakage; Magnetic materials; Magnetic shielding; Permanent magnets; Soft magnetic materials; Steel; FEM; high magnetic field; permanent magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.530548

Filename

1325028