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Article
Title	Challenges in the Support Structure Design and Assembly of HD3, a Nb$_3$Sn Block-Type Dipole Magnet
Author(s)	Felice, H (LBNL, Berkeley) ; Borgnolutti, F (LBNL, Berkeley) ; Caspi, S (LBNL, Berkeley) ; Cheng, D W (LBNL, Berkeley) ; Dietderich, D R (LBNL, Berkeley) ; Ferracin, P (LBNL, Berkeley) ; Godeke, A (LBNL, Berkeley) ; Hafalia, A R (LBNL, Berkeley) ; Joseph, J M (LBNL, Berkeley) ; Lizarazo, J (LBNL, Berkeley) ; Marchevsky, M (LBNL, Berkeley) ; Prestemon, S (LBNL, Berkeley) ; Sabbi, G (LBNL, Berkeley) ; Wang, X R (CERN)
Publication	2013
Number of pages	5
In:	IEEE Trans. Appl. Supercond. 23 (2013) 4001705
In:	Applied Superconductivity Conference 2012: The Next Century of Superconductivity, Portland, OR, USA, 7 - 12 Oct 2012, pp.4001705
DOI	10.1109/TASC.2013.2243794
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC
Abstract	As part of the development of very high field dipole magnets for particle accelerators, the Superconducting Magnet Program at Lawrence Berkeley National Laboratory is developing block-type dipole magnets. One of the main challenges of this geometry is to provide support to the coil in the aperture while maintaining an adequate clear bore. Through finite element method analysis, strain-gauge measurements, and test results, this paper reviews the design of HD3, a 1-m-long, 43-mm-bore Nb$_3$Sn dipole magnet, presents the findings in terms of strain gauges monitoring, and summarizes their implications.
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