CERN Accelerating science

Article
Report number	LBNL-57977
Title	HD1: design and fabrication of a 16 Tesla Nb$_3$Sn dipole magnet
Related title	HD1: Design and fabrication of a 16-Tesla Nb-3_Sn dipole magnet.
Author(s)	Hafalia, A R (LBNL, Berkeley) ; Bartlett, S E (LBNL, Berkeley) ; Caspi, S (LBNL, Berkeley) ; Chiesa, L (LBNL, Berkeley) ; Dietderich, D R (LBNL, Berkeley) ; Ferracin, P (LBNL, Berkeley) ; Goli, M (LBNL, Berkeley) ; Gourlay, S A (LBNL, Berkeley) ; Hannaford, C R (LBNL, Berkeley) ; Higley, H (LBNL, Berkeley) ; Lietzke, A F (LBNL, Berkeley) ; Liggins, N (LBNL, Berkeley) ; Mattafirri, S (LBNL, Berkeley) ; McInturff, A D (LBNL, Berkeley) ; Nyman, M (LBNL, Berkeley) ; Sabbi, G L (LBNL, Berkeley) ; Scanlan, R M (LBNL, Berkeley) ; Swanson, J (LBNL, Berkeley)
Publication	2004
Imprint	2003-10
Number of pages	4
In:	IEEE Trans. Appl. Supercond. 14 (2004) 283-286
In:	18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.283-286
DOI	10.1109/TASC.2004.829085
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC
Abstract	The Lawrence Berkeley National Laboratory (LBNL) Superconducting Magnet Group has completed the design, fabrication and test of HD1, a 16 T block-coil dipole magnet. State of the art Nb$_3$Sn conductor was wound in double-layer racetrack coils and supported by an iron yoke and a tensioned aluminum shell. In order to prevent conductor movement under magnetic forces up to the design field, a coil pre-stress of 150 MPa was required. To achieve this level without damaging the brittle conductor, the target stress was generated during cool-down to 4.2 K by exploiting the thermal contraction differentials between yoke and shell. Accurate control of the shell tension during assembly was obtained using pressurized bladders and interference load keys. An integrated 3D CAD model was used to optimize magnetic and mechanical design and analysis.
Copyright/License	U.S. government work not protected by U.S. copyright.

Corresponding record in: Inspire