CERN Accelerating science

Published Articles
Report number	FERMILAB-CONF-13-273-TD
Title	Performance of HQ02, an optimized version of the 120 mm $Nb_3Sn$ LARP quadrupole
Author(s)	Chlachidze, G (Fermilab) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven Natl. Lab.) ; Borgnolutti, F (LBNL, Berkeley) ; Bossert, R (Fermilab) ; Caspi, S (LBNL, Berkeley) ; Cheng, D W (LBNL, Berkeley) ; Dietderich, D (LBNL, Berkeley) ; Felice, H (LBNL, Berkeley) ; Ferracin, P (CERN) ; Ghosh, A (Brookhaven Natl. Lab.) ; Godeke, A (LBNL, Berkeley) ; Hafalia A R (LBNL, Berkeley) ; Marchevsky, M (LBNL, Berkeley) ; Orris, D (Fermilab) ; Roy, P K (LBNL, Berkeley) ; Sabbi, G L (LBNL, Berkeley) ; Salmi, T (LBNL, Berkeley) ; Schmalzle, J (Brookhaven Natl. Lab.) ; Sylvester, C (Fermilab) ; Tartaglia, M (Fermilab) ; Tompkins, J (Fermilab) ; Wanderer, P (Brookhaven Natl. Lab.) ; Wang, X R (LBNL, Berkeley) ; Zlobin, A V (Fermilab)
Publication	2014
Imprint	2013-07-16
Number of pages	5
In:	IEEE Trans. Appl. Supercond. 24 (2014) 4003805
In:	23rd International Conference on Magnet Technology, Boston, MA, USA, 14 - 19 Jul 2013, pp.4003805
DOI	10.1109/TASC.2013.2285885
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC ; LARP
Abstract	In preparation for the high luminosity upgrade of the Large Hadron Collider (LHC), the LHC Accelerator Research Program (LARP) is developing a new generation of large aperture high-field quadrupoles based on Nb$_{3}$Sn technology. One meter long and 120 mm diameter HQ quadrupoles are currently produced as a step toward the eventual aperture of 150 mm. Tests of the first series of HQ coils revealed the necessity for further optimization of the coil design and fabrication process. A new model (HQ02) has been fabricated with several design modifications, including a reduction of the cable size and an improved insulation scheme. Coils in this magnet are made of a cored cable using 0.778 mm diameter Nb$_{3}$Sn strands of RRP 108/127 sub-element design. The HQ02 magnet has been fabricated at LBNL and BNL, and then tested at Fermilab. This paper summarizes the performance of HQ02 at 4.5 K and 1.9 K temperatures.

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