Qualification of the Joints for the ITER Central Solenoid

Author

Martovetsky, N.N. ; Berryhill, A.B. ; Kenney, S.J.

Author_Institution

Lawrence Livermore Nat. Lab., USIPO, Oak Ridge, TN, USA

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

4804004

Lastpage

4804004

Abstract

The ITER Central Solenoid has 36 interpancake joints, 12 bus joints, and 12 feeder joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The US ITER Project Office developed two different types of interpancake joints with some variations in details in order to find a better design, qualify the joints, and establish a fabrication process. We built and tested four samples of the sintered joints and two samples with butt-bonded joints (a total of eight joints). Both designs met the specifications. Results of the joint development, test results, and selection of the baseline design are presented and discussed in the paper.

Keywords

multifilamentary superconductors; sintering; solenoids; superconducting cables; superconducting magnets; superconducting transformers; ITER central solenoid; US ITER Project Office; bus joints; butt-bonded joints; current 45 kA; fabrication process; feeder joints; interpancake joints; joint development; joints qualification; multifilamentary superconductor; sintered joints; superconducting cable; superconducting magnet; superconducting transformer; temperature 4.5 K; Current measurement; Electrical resistance measurement; Joints; Resistance; Voltage measurement; Welding; Multifilamentary superconductors; super-conducting cables; superconducting magnets; superconducting transformers;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2011.2179400

Filename

6104381