CERN Accelerating science

Article
Report number	CERN-ACC-2014-0022
Title	Characterization of Nb$_{3}$Sn Rutherford cables for the LHC 11-T Dipole Magnet
Related title	Characterisation of Nb3Sn Rutherford cables for the LHC Dispersion Suppression Dipole
Author(s)	Wuis, A J (CERN ; Twente U., Enschede) ; Bordini, B (CERN) ; Ballarino, A (CERN) ; Oberli, L (CERN) ; Ten Kate, H H J (CERN ; Twente U., Enschede)
Publication	2013
Imprint	07 Feb 2014
Number of pages	5
In:	IEEE Trans. Appl. Supercond. 24 (2013) 4003505
In:	23rd International Conference on Magnet Technology, Boston, MA, USA, 14 - 19 Jul 2013, pp.4003505
DOI	10.1109/TASC.2013.2290070
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC ; ATLAS CERN LHC
Free keywords	Nb3Sn ; Rutherford cable ; Stability ; Super-conductor
Abstract	The so-called CERN-LHC DS upgrade relies on the use of 11 T dipole magnets. For these magnets 40 strands Nb$_{3}$Sn type Rutherford cables based on 0.7 mm wires are being developed. Recently four samples of the cables were characterized in the CERN FRESCA cable test station. The critical current and the premature quench current due to magneto-thermal instability were measured at 1.9 K and 4.3 K in a background magnetic field between 0 and 9.6 T (the peak magnetic field on the conductor, including the self-field of the cable, ranges from   2 T to   12 T). Two cable samples were based on Powder-In-Tube (PIT) wire and two on Restacked-Rod-Process (RRP) wire. The PIT samples were identical and without a core in the cable while one of the RRP samples features a 25 μm thick stainless steel core. All cables samples tested have a width and a thickness of about 14.7 mm and 1.25 mm, respectively. Cables and sample holders were manufactured at CERN. In this paper we report and discuss the cable test results and compare them to the performance of witness strands, heat treated and measured on ITER-VAMAS type sample holders.

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