Development of the Joints for ITER Central Solenoid

Author

Martovetsky, Nicolai N. ; Kenney, Steven J. ; Miller, John R.

Author_Institution

Lawrence Livermore Nat. Lab., Livermore, CA, USA

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

1922

Lastpage

1925

Abstract

The ITER Central Solenoid has 36 interpancake joints and 12 bus joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The interpancake joints will have to withstand a significant cyclic tensile strain during ITER operation. The joints are located at the OD of the magnet embedded in the winding pack and therefore need to be compliant with the rest of the winding pack to avoid excessive stress. The US ITER Project Office is carrying out a program for joints development in order to establish fabrication process and also characterize electrical and mechanical performance of the joints in a special Joint Test Apparatus. Status of the joint development and test results are presented and discussed in the paper.

Keywords

cable jointing; superconducting cables; superconducting device testing; superconducting magnets; tensile strength; transformer windings; ITER central solenoid; US ITER project office; bus joints; current 45 kA; cyclic tensile strain; interpancake joints; joint test apparatus; resistance 4 nohm; superconducting cable; superconducting magnet; temperature 4.5 K; winding pack; Current measurement; Electrical resistance measurement; Fabrication; Heat treatment; Joints; Resistance; Windings; Superconducting 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.2010.2100344

Filename

5701783