Title :
Strand critical current degradation in Nb3Sn Rutherford cables
Author :
Barzi, Emanuela ; Fratini, Michela ; Higley, Hugh C. ; Scanlan, Ron M. ; Yamada, Ryuji ; Zlobin, Alexander V.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
Fermilab is developing 11 Tesla superconducting accelerator magnets based on Nb3Sn superconductor. Multifilamentary Nb 3Sn strands produced using the modified jelly roll, internal tin, and powder-in-tube technologies were used for the development and test of the prototype cable. To optimize the cable geometry with respect to the critical current, short samples of Rutherford cable with packing factors in the 85 to 95% range were fabricated and studied. In this paper, the results of measurements of critical current, n-value and RRR made on the round virgin strands and on the strands extracted from the cable samples are presented
Keywords :
accelerator magnets; critical current density (superconductivity); multifilamentary superconductors; niobium alloys; storage rings; superconducting cables; superconducting magnets; synchrotrons; tin alloys; 11 T; Fermilab; Nb3Sn; Nb3Sn Rutherford cables; Very Large Hadron Collider; cable geometry optimisation; internal tin; modified jelly roll; multifilamentary Nb3Sn strands; powder-in-tube technologies; strand critical current degradation; superconducting accelerator magnets; Accelerator magnets; Critical current; Degradation; Multifilamentary superconductors; Niobium; Prototypes; Superconducting cables; Superconducting magnets; Testing; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
