The FBI facility - A test rig for critical current measurements on CICC as a function of strain

Alexander Vostner, Ettore Salpietro, Klaus P. Weiss, Walter H. Fietz, Antonio Della Corte, Luigi Muzzi

Research output: Contribution to journalArticle

10 Citations (Scopus)


One of the most important characteristics of Nb3Sn strands is the strain dependence of the critical current density which has to be taken into account for every conductor design, especially for cable-in-conduit conductors (CICC) due to the additional influence of the jacket material. Therefore, a task has been launched in the framework of the European Fusion Technology Program to determine the residual thermal strain of single strands and different multi-stage conductors on absolute scale which is essential for the final optimization of the ITER TF conductor. For this purpose, an existing test rig for critical current measurements on single strands and multi-stage CICC as a function of strain and field, the FBI facility at the Forschungszentrum Karlsruhe, has been recently modified and modernized to improve the overall accuracy and resolution of the system. After a description of the facility, its capabilities and the recently performed upgrades, this paper explains the scheduled test program and the strategy to assess the impact of the cable pattern and size on the residual thermal strain. Results on Nb3Sn strands jacketed in stainless steel are presented as well. © 2005 IEEE.
Original languageEnglish
Pages (from-to)1387 - 1390
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2 PART II
Publication statusPublished - Jun 2005
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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