Title :
Test Results on MgB2 Windings for AC Applications
Author :
Nardelli, D. ; Marabotto, R. ; Grasso, G.. ; Martini, L. ; Bocchi, M.. ; Dalessandro, R.. ; Modica, M. ; Tassisto, M. ; Pietranera, D.. ; Penco, R..
Author_Institution :
ASG Supercond., Genova
fDate :
6/1/2007 12:00:00 AM
Abstract :
In the frame of a research and development project named LIMSAT several MgB2 tapes and windings were fabricated and tested in DC and AC current regime. All technical aspects related to the choice of the MgB2 tape layout as well as the winding technology and insulation will be reported. Different tape layout and insulating technique were used for the different windings, in particular several lengths of MgB2 multifilamentary Cu-stabilized Ni-sheathed tape. Critical current measurements on short samples of the tape used, performed in a cryogenic-free test facility, showed currents over 250 A at 20 K, 1 T. Five non inductive windings were made using lengths from about 35 to 130 m and tested in liquid He and liquid Ne. The results from electrical DC and AC tests are reported and discussed.
Keywords :
critical currents; magnesium compounds; multifilamentary superconductors; research and development; superconducting tapes; type II superconductors; windings; AC applications; AC current regime; DC current regime; LIMSAT; MgB2; critical current measurements; cryogenic-free test facility; insulating technique; liquid helium; liquid neon; magnetic flux density 1 T; multifilamentary tape; noninductive windings; research and development project; tape layout; temperature 20 K; Critical current; Current measurement; Electric variables measurement; Helium; Insulation; Length measurement; Performance evaluation; Research and development; Test facilities; Testing; ${rm MgB}_{2}$; AC loss; FCL; non inductive; tape;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.899070
