D Ciazynski et al 2006 J. Phys.: Conf. Ser. 43 744 doi:10.1088/1742-6596/43/1/182
D Ciazynski, L Zani, P Decool, H Cloez, J P Serries and M Tena
Show affiliationsFull size conductor short samples for the International Thermonuclear Experimental Reactor (ITER) are composed of two straight conductors connected together at one end, and to the facility current leads at the other ends. The quality of these electrical connections was early suspected to play a role in the measurement of the conductor performance, which has been confirmed by recent test results. In order to investigate this phenomenon, CEA developed an experimental program, within EFDA task ELRES, to study the effect of well calibrated joint defects on subsize NbTi conductor performances. Two types of NbTi strands associated with two different cable void fractions were used in order to vary the interstrand resistances. Experimental results clearly show that joint defects degrade measured conductor critical currents, except when sufficiently low interstrand resistances allow a possible current redistribution among strands. Analysis of Hall probe signals show evidence of current redistribution among subcables during the tests.
74.70.Ad Metals; alloys and binary compounds (including A15, MgB2, etc.)
Issue 1 (2006)
D Ciazynski et al 2006 J. Phys.: Conf. Ser. 43 744
R Latif et al 2003 Meas. Sci. Technol. 14 1063
M L Pilcher and B A Tozer 1966 Br. J. Appl. Phys. 17 695
Tomonori Watanabe 2002 J. Phys. A: Math. Gen. 35 305
S M Barnett et al 1992 J. Phys. B: At. Mol. Opt. Phys. 25 1307
H Schrader 2007 Metrologia 44 S53
A D Liston et al 2004 Physiol. Meas. 25 143
A Birnboim and H Gutfreund 1976 J. Phys. F: Met. Phys. 6 2341
M Irie and M R Barrault 1978 J. Phys. D: Appl. Phys. 11 271
Torsten Hein and Bernd Hofmann 2003 Inverse Problems 19 1319