Effect of conduit material on CICC performance under high cycling loads

Author

Martovetsky, Nicolai N. ; Bruzzone, Pierluigi ; Stepanov, Boris ; Wesche, Rainer ; Gung, Chen-Yu ; Minervini, Joseph V. ; Takayasu, Makoto ; Goodrich, Loren F. ; Ekin, Jack W. ; Nijhuis, Arend

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1367

Lastpage

1370

Abstract

Recent International Thermonuclear Experimental Reactor (ITER) Model Coils and tests on Nb₃Sn Cable in Conduit Conductors (CICC) showed a significant and unexpected increase in the broadness of the transition to the normal state, resulting in degradation of superconducting properties. To investigate these phenomena, two CICC samples were built with identical 144 strand cables but different conduit materials. One sample had titanium conduit with low coefficient of thermal expansion, the other had stainless steel conduit. The purpose of this experiment was to study changes in strand properties in the cable (critical current, current sharing temperature, n-value), the effects of cycling and high electromagnetic load, and the effect of the conduit on the CICC performance.

Keywords

critical current density (superconductivity); electric conduits; fusion reactor materials; stainless steel; superconducting cables; thermal expansion; titanium; CICC performance; ITER model coils; Nb₃Sn; cable in conduit conductors; conduit material; critical current; current sharing temperature; high cycling loads; n-value properties; stainless steel conduit; strand properties; superconducting cables; superconducting filaments; superconducting properties degradation; superconducting wires; thermal expansion; titanium conduit; Conducting materials; Inductors; Niobium; Superconducting cables; Superconducting coils; Superconducting materials; Testing; Thermal degradation; Tin; Titanium; superconducting cables; superconducting filaments and wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849091

Filename

1439896