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Title	Test Results of 15 T Nb$_3$Sn Quadrupole Magnet HQ01 with a 120 mm Bore for the LHC Luminosity Upgrade
Author(s)	Caspi, S (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven) ; Barzi, E (Fermilab) ; Bingham, B (LBL, Berkeley) ; Bossert, R (Fermilab) ; Cheng, D W (LBL, Berkeley) ; Chlachidze, G (Fermilab) ; Dietderich, D R (LBL, Berkeley) ; Felice, H (LBL, Berkeley) ; Ferracin, P (LBL, Berkeley) ; Ghosh, A (Brookhaven) ; Hafalia, A R (LBL, Berkeley) ; Hannaford, C R (LBL, Berkeley) ; Joseph, J (LBL, Berkeley) ; Kashikhin, V V (Fermilab) ; Sabbi, G L (LBL, Berkeley) ; Schmalzle, J (Brookhaven) ; Wanderer, P (Brookhaven) ; Xiaorong, W (LBL, Berkeley) ; Zlobin, A V (Fermilab)
Publication	2010
Number of pages	4
In:	IEEE Trans. Appl. Supercond. 21 (2010) 5623312
In:	Applied Superconductivity Conference 2010, Washington, DC, USA, 1 - 6 Aug 2010, pp.1854-1857
DOI	10.1109/TASC.2010.2087370
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC LARP
Project	CERN HL-LHC
Abstract	In support of the luminosity upgrade of the Large Hadron Collider (LHC), the US LHC Accelerator Research Program (LARP) has been developing a 1-meter long, 120 mm bore Nb$_3$Sn IR quadrupole magnet (HQ). With a short sample gradient of 219 T/m at 1.9 K and a conductor peak field of 15 T, the magnet will operate under higher forces and stored-energy levels than that of any previous LARP magnet models. In addition, HQ has been designed to incorporate accelerator quality features such as precise coil alignment and adequate cooling. The first 6 coils (out of the 8 fabricated so far) have been assembled and used in two separate tests-HQ01a and HQ01b. This paper presents design parameters, summary of the assemblies, the mechanical behavior as well as the performance of HQ01a and HQ01b.
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