Critical current measurements of the cable for the superconducting dipole prototypes for the Large Hadron Collider

Author

Baccaglioni, G. ; Fabbricatore, P. ; Garre, R. ; Musenich, R. ; Parodi, R. ; Rossi, L. ; Volpini, G.

Author_Institution

Istituto Nazionale di Fisica Nucl., Rome, Italy

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1827

Lastpage

1830

Abstract

The specifications of the NbTi/Cu cable for the superconducting dipole of the LHC are very demanding: J_c (non Cu) in excess of 1000 A/mm² at 8 tesla and 4.2 K, with filament diameter of 5-6 microns. One type of cable is composed of 28 strands with a required critical current at 8 T and 4.2 K of 13000 A and the other one has 40 strands with I_c at 6 T and 4.2 K of 15500 A. We describe the results we obtained in an extensive campaign of I_c measurements carried out both on cables and on strands, these last both in virgin state and extracted from cable. The reliability of extrapolation from strands I_c to cable performance is discussed as well as the degradation due to a cross-over in the cable thin edge

Keywords

copper; critical currents; niobium alloys; proton accelerators; storage rings; superconducting magnets; synchrotrons; titanium alloys; 13000 A; 15500 A; 4.2 K; 6 T; 8 T; Large Hadron Collider; NbTi-Cu; cable performance; critical current measurements; superconducting dipole prototypes; Conductors; Copper; Critical current; Current measurement; Degradation; Large Hadron Collider; Power cables; Prototypes; Superconducting cables; Superconducting epitaxial layers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305618

Filename

305618