Evaluation of a NbTi cable-in-conduit prototype superconductor for the Wendelstein 7-X magnet system

Author

Blau, B. ; Jakob, B. ; Pasztor, G. ; Vécsey, G. ; Cerri, A. ; Marti, H.P.

Author_Institution

Fusion Technol. Div., EPFL-CRPP, Villigen, Switzerland

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

2430

Lastpage

2433

Abstract

Swissmetal recently completed a contract to manufacture 200 m of NbTi cable-in-conduit prototype conductors to be used in the Wendelstein 7-X superconducting magnet system. The conductor consists of a 192 strand, four stage NbTi cable in an aluminium alloy jacket cooled by forced flow helium. It will operate at 16 kA, 3.8 K and 6.2 T. To qualify this conductor electrical tests were performed on a 3.6 m long full-size specimen in the SULTAN test facility at CRPP. In preparation for these tests two conductor terminations and one electrical joint were manufactured in a relatively simple and, therefore, time and cost saving way. This paper presents the test results of critical current measurements performed on the conductor as well as of extracted strands in background fields of up to 8 T. The joint is described and its resistance is reported. In addition the results of pressure drop measurements at room temperature are presented

Keywords

cable jointing; cable sheathing; critical currents; electric conduits; multifilamentary superconductors; niobium alloys; power cable testing; power cables; superconducting cables; superconducting magnets; superconducting materials; titanium alloys; 16 kA; 200 m; 3.6 m; 3.8 K; 6.2 T; NbTi; SULTAN test facility; Wendelstein 7-X superconducting magnet; cable-in-conduit superconductor; conductor terminations; critical current measurements; electrical joint; electrical tests; multistrand cable jacket; pressure drop measurements; test results; Cable shielding; Conductors; Manufacturing; Niobium compounds; Performance evaluation; Prototypes; Superconducting cables; Superconducting magnets; Testing; Titanium compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511364

Filename

511364