Design of internal-tin Nb/sub 3/Sn current switch strand and strand for accelerator magnets

Author

Shikov, A. ; Pantsyrnyi, V. ; Nikulin, Alexey ; Vorobieva, A. ; Silaev, A. ; Soudiev, S. ; Beliakov, N.

Author_Institution

SSC RF Bochvar Res. Inst. of Inorg. Mater., Moscow, Russia

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

996

Lastpage

999

Abstract

Different areas of internal-tin Nb/sub 3/Sn strands application have been analyzed. It was shown that internal-tin strands could be most promising for use in persistent current switches and for high field, enhanced current magnet systems. Appropriate Nb/sub 3/Sn internal-tin strands have been designed, fabricated and tested. The design of Nb/sub 3/Sn strand for current switch consists of high resistance Cu-Sn-Ni matrix and Nb/sub 3/Sn filaments. It was shown that Nb/sub 3/Sn switch strand 0.9 mm in dia has a current capacity of 1 kA at 4.2 K, 1 T and resistance above 8 /spl mu//spl Omega/*cm at 20 K. For the magnets of next generation accelerators Nb/sub 3/Sn internal-tin strand with enhanced current capacity has been designed. Critical current density of that strand was above 2000 A/mm/sup 2/ at 4.2 K, 12 T, 0.1 /spl mu/V/cm.

Keywords

critical current density (superconductivity); niobium alloys; superconducting magnets; superconducting switches; tin alloys; type II superconductors; Nb/sub 3/Sn; accelerator magnets; critical current density; high field enhanced current magnet systems; internal-tin Nb/sub 3/Sn current switch strand; persistent current switches; Accelerator magnets; Critical current density; Magnetic switching; Niobium; Persistent currents; Process design; Radio frequency; Superconducting magnets; Switches; Tin;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828399

Filename

828399