Design and construction of a one-metre model of the 70 mm aperture quadrupole for the LHC low-β insertions

Author

Ostojic, R. ; Taylor, T.M. ; Kirby, G.A.

Author_Institution

AT Div., CERN, Geneva, Switzerland

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1750

Lastpage

1753

Abstract

In order to achieve high field quality and low current rating of the 250 T/m quadrupoles for the LHC low-β insertions, a design based on a graded four-layer coil with an aperture of 70 mm, wound from NbTi conductor cooled at 1.8 K, has been proposed. Its mechanical structure is based on the collar-spacer concept, where a thin collar serves for coil assembly only. The iron yoke has both important magnetic and structural functions, since the magnetic forces are taken by the rigidity of the iron lamination pack. The coil and cable parameters are derived for this particular structure, and the results of the structural analysis of the magnet are presented. A one-metre model of the quadrupole is presently under construction; its features are described and some initial cable tests reported

Keywords

beam handling equipment; beam handling techniques; niobium alloys; proton accelerators; storage rings; superconducting magnets; synchrotrons; titanium alloys; 1.8 K; 70 mm; 70 mm aperture quadrupole; LHC; NbTi; NbTi conductor; cable parameters; cable tests; coil; collar-spacer concept; graded four-layer coil; high field quality; lamination pack; low current rating; low-β insertions; mechanical structure; structural analysis; Apertures; Assembly; Coils; Conductors; Iron; Large Hadron Collider; Magnetic forces; Niobium compounds; Titanium compounds; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305595

Filename

305595