Design and fabrication of a single-aperture 11 T Nb 3Sn dipole model for LHC upgrades

A.V. Zlobin
N. Andreev
G. Apollinari
B. Auchmann
E. Barzi
R. Bossert
M. Karppinen
F. Nobrega
I. Novitski
L. Rossi
D. Smekens
D. Turrioni
R. Yamada

Open link

Publication date

January 2012

DOI

10.1109/TASC.2011.2177619

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Abstract

The planned upgrade of the LHC collimation system includes additional collimators to be installed in the dispersion suppressor areas of points 2, 3 and 7. To provide the necessary longitudinal space for the collimators, a replacement of 8.33 T Nb-Ti LHC main dipoles with 11 T dipoles based on Nb 3Sn superconductor compatible with the LHC lattice and main systems is being considered. To demonstrate this possibility FNAL and CERN have started a joint program to develop a 2 m long single-aperture dipole magnet with the nominal field of 11 T at 3c11.85 kA current and 60 mm bore. This paper describes the demonstrator magnet magnetic and mechanical designs and analysis, coil fabrication procedure. The Nb 3Sn strand and cable parameters and test ...