Title :
Strain dependence of critical current in internal tin process Nb3Sn strands
Author :
Oh, Sangjun ; Park, Soo Hyeon ; Lee, Chulhee ; Chang, Yongbok ; Kim, Keeman ; Park, Pyeong-Yeol
Author_Institution :
Korea Basic Sci. Inst., Daejeon, South Korea
fDate :
6/1/2005 12:00:00 AM
Abstract :
The development of a high performance superconducting magnet requires a thorough understanding of the strain effect in the critical current density (Jc) of Nb3Sn strands. A modified version of the WASP device is used for the investigation of the strain effect. The spring is made of BeCu alloy and is capable of applying strain up to 0.7% reversibly at 4.2 K. Several types of high performance Nb3Sn strands (Jc>1000 A/mm2 at 12 T and 4.2 K) have been developed using internal tin process. A comparative study on the axial strain dependence of the critical current is performed.
Keywords :
critical current density (superconductivity); multifilamentary superconductors; niobium alloys; stress-strain relations; superconducting magnets; superconducting tapes; tin alloys; 12 T; 4.2 K; BeCu; BeCu alloy; Nb3Sn; Nb3Sn strands; WASP device; axial strain dependence; critical current; internal tin process; strain effect; superconducting magnet; Capacitive sensors; Conducting materials; Critical current; Critical current density; Heat treatment; Magnetic field induced strain; Niobium; Superconducting magnets; Temperature; Tin; Internal tin process; WASP device; strain effect in the critical current density;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849058
