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R. Zanino, M. Bagnasco, G. Dittrich, W.H. Fietz, H. Fillunger, D.P. Hampshire, R. Heller, P. Komarek, O. Langhans, R. Maix, V. Marchese, N. Martovetsky, N. Mitchell, A. Nijhuis, S. Raff, M. Ricci, M. Suesser, E. Salpietro, L. Savoldi Richard, D.M.J. TaylorA. Ulbricht, A. Vostner, F. Wuechner, G. Zahn

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The tests of the Toroidal Field Model Coil (TFMC) were completed in 2002 in the TOSKA facility of Forschungszentrum Karlsruhe, Germany. Operation reached a combined 80 kA in the TFMC and 16 kA in the LCT coil, resulting in a peak electromechanical load very close to that expected in the full-size ITER TF coils (800 kN/m). Here we concentrate on the measurements of the current sharing temperature (Tcs) of the TFMC conductor, possibly the highlight of the whole test campaign. These tests were performed by increasing in steps the helium inlet temperature Tinin double pancake DP1, resulting in an increasing normal voltage V across the DP1.1 and DP1.2 conductors, and were repeated for several combinations of currents in the TFMC and in the LCT coil. The analysis of the V - Tincharacteristic by means of the M&M code allows to self-consistently deriving an estimate of Tcs, as well as an indirect assessment of the "average" strain state in the conductor. The TFMC isolated strand has also been very recently characterized at different applied uniaxial strain, and preliminary results indicate a stronger reduction of carrying capacity compared to the extrapolation from Summers scaling used in the analysis so far. As a consequence, the performance of the TFMC conductor, as preliminarily re-evaluated here, appears more in line with the strand performance than in previous analysis, although a BI-dependent "degradation" is still present.
Original languageEnglish
Pages (from-to)1519 - 1522
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number2
DOIs
Publication statusPublished - Jun 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

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

Cite this

Zanino, R., Bagnasco, M., Dittrich, G., Fietz, W. H., Fillunger, H., Hampshire, D. P., ... Zahn, G. (2004). T. IEEE Transactions on Applied Superconductivity, 14(2), 1519 - 1522. https://doi.org/10.1109/TASC.2004.830682