Development of 40 tesla class hybrid magnet system

Author

Inoue, K. ; Takeuchi, T. ; Kiyoshi, T. ; Itoh, K. ; Wada, H. ; Maeda, H. ; Fujioka, T. ; Murase, S. ; Wachi, Y. ; Hanai, S. ; Sasaki, T.

Author_Institution

Nat. Res. Inst. for Metals, Ibaraki, Japan

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

493

Lastpage

496

Abstract

The construction of a 40-T class hybrid magnet system is in progress at the National Research Institute for Metals, Japan. The present design concept for this system includes a 15-T superconducting magnet with a room-temperature clear bore of 400 mm and a 20-T polyhelix-type water-cooled resistive magnet with a clear bore of 50 mm, and a 25-T resistive magnet with a clear bore of 30 mm. The total maximum field to be reached is 40 T for the clear bore of 30 mm, and 35 T for the clear bore of 50 mm. Analytical results on the mechanical stress induced in the magnet system are presented. A new design of a Cu-housing conductor with vacancy is proposed for reducing the transverse compressive stress of the Nb₃Sn monolith. Cu-Al ₂O₃ and Cu-Cr alloys are used as the conductor materials for the 25-T and 20-T water-cooled magnets, respectively. The final designs of the water-cooled magnets are also presented

Keywords

electromagnets; stress analysis; superconducting magnets; 15 T; 20 T; 25 T; 30 mm; 35 T; 40 T; 400 mm; 50 mm; Cu housing conductor; Cu-Al₂O₃; CuCr alloys; Nb₃Sn monolith; design concept; hybrid magnet system; mechanical stress; polyhelix-type water-cooled resistive magnet; superconducting magnet; transverse compressive stress; Boring; Compressive stress; Conducting materials; Magnetic analysis; Magnetic fields; Magnetic materials; Niobium-tin; Superconducting magnets; Temperature; Tensile stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.119919

Filename

119919