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Title	Design of HQ—A High Field Large Bore Nb$_3$Sn Quadrupole Magnet for LARP
Author(s)	Felice, H (LBNL, Berkeley) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven Natl. Lab.) ; Bossert, R (Fermilab) ; Caspi, S (LBNL, Berkeley) ; Cheng, D W (LBNL, Berkeley) ; Dietderich, D R (LBNL, Berkeley) ; Ferracin, P (LBNL, Berkeley) ; Ghosh, A K (Brookhaven Natl. Lab.) ; Hafalia, R (LBNL, Berkeley) ; Hannaford, C R (LBNL, Berkeley) ; Kashikhin, V (Fermilab) ; Schmalze, J (Brookhaven Natl. Lab.) ; Prestemon, S (LBNL, Berkeley) ; Sabbi, G L (LBNL, Berkeley) ; Wanderer, P (Brookhaven) ; Zlobin, A V (Fermilab)
Publication	2009
Number of pages	5
In:	IEEE Trans. Appl. Supercond. 19 (2009) 1235-1239
In:	Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.1235-1239
DOI	10.1109/TASC.2009.2019105
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC LARP
Project	CERN HL-LHC
Abstract	In support of the Large Hadron Collider luminosity upgrade, a large bore (120 mm) Nb$_3$Sn quadrupole with 15 T peak coil field is being developed within the framework of the US LHC Accelerator Research Program (LARP). The 2-layer design with a 15 mm wide cable is aimed at pre-stress control, alignment and field quality while exploring the magnet performance limits in terms of gradient, forces and stresses. In addition, HQ will determine the magnetic, mechanical, and thermal margins of Nb$_3$Sn technology with respect to the requirements of the luminosity upgrade at the LHC.
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