Title :
The effect of transverse loads up to 300 MPa on the critical currents of Nb3Sn cables [for LHC]
Author :
Boschman, H. ; Verweij, A.P. ; Wessel, S. ; ten Kate, H.H.J. ; van de Klundert, L.J.M.
Author_Institution :
Appl. Superconductivity Centre, Twente Univ., Netherlands
fDate :
3/1/1991 12:00:00 AM
Abstract :
In the framework of the development of an experimental 10-T Nb3Sn dipole coil for the LHC (Large Hadron Collider) at CERN, the effects of transverse stress on Rutherford-type Nb3Sn cable were investigated. For this purpose a special facility was designed and put into operation in which the voltage-current behavior of short pieces of Nb3Sn cables can be investigated in a background field of up to 11 T and an applied stress of 300 MPa. The repulsive Lorentz force of 250 kN, generated by a set of superconducting coils, is used to impress the cable over an area of 20×42 mm2 maximum, in the presence of a transport current of up to 40 kA. The testing equipment is described, and the first results of the observed critical current degradation of two Nb3Sn cables are discussed
Keywords :
beam handling equipment; composite superconductors; critical currents; niobium alloys; proton accelerators; storage rings; stress effects; superconducting cables; superconducting magnets; synchrotrons; tin alloys; type II superconductors; 11 T; A15 superconductor; LHC dipole coil; Large Hadron Collider; Nb3Sn cables; Rutherford type cable; critical currents; current degradation; effect of transverse loads; repulsive Lorentz force; voltage-current behavior; Critical current; Large Hadron Collider; Lorentz covariance; Niobium; Stress; Superconducting cables; Superconducting coils; Testing; Tin; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
