Title :
Study of Nb3Sn cable stability at self-field using a SC transformer
Author :
Barzi, E. ; Andreev, N. ; Kashikhin, V.V. ; Turrioni, D. ; Zlobin, A.V.
Author_Institution :
Fermi Nat. Accel. Lab., USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
A superconducting current transformer with a maximum DC current of 28 kA has been used for Nb3Sn cable testing at self-fields under various experimental conditions. A fast data acquisition system was developed and used for accurate measurements of the secondary current. Test results are shown for thirty cables made of MJR, RRP and PIT strands, along with a description of the SC transformer, sample preparation and test procedure. It was found that premature quenches at currents significantly lower than the expected critical currents at low fields were due to electromagnetic instabilities in the superconductor.
Keywords :
cable testing; data acquisition; mechanical stability; niobium alloys; superconducting cables; superconducting transformers; tin alloys; 28 kA; DC current; MJR strand; Nb3Sn; Nb3Sn cable stability; Nb3Sn cable testing; PIT strand; RRP strand; Rutherford cable; SC transformer; data acquisition system; electromagnetic instability; premature quenches; sample preparation; self-field stability; superconducting current transformer; superconducting transformer; test procedure; Coils; Current measurement; Current transformers; Niobium compounds; Power transformer insulation; Stability; Superconducting cables; Superconducting magnets; Testing; Tin; Instability; Rutherford cable; superconducting transformer;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849160
