A system for series magnetic measurements of the LHC main quadrupoles

Author

Smirnov, N. ; Bottura, L. ; Chiusano, F. ; Dunkel, O. ; Legrand, P. ; Schloss, S. ; Schnizer, P. ; Sievers, P.

Author_Institution

LHC Div., CERN, Geneva, Switzerland

Volume

12

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1688

Lastpage

1692

Abstract

More than 400 twin aperture lattice quadrupoles are needed for the Large Hadron Collider (LHC) which is under construction at CERN. The main quadrupole is assembled with correction magnets in a common cryostat called the Short Straight Section (SSS). We plan to measure all SSSs in cold conditions with an unprecedented accuracy: integrated gradient of the field within 150 ppm, harmonics in a range of 1 to 5 ppm, magnetic axis of all elements within 0.1 mm and their field direction within 0.2 mrad. In this paper we describe the automatic measurement system that we have designed, built, and calibrated. Based on the results obtained on the two first prototypes of the SSSs (SSS3 and SSS4) we show that this system meets all above requirements.

Keywords

accelerator magnets; colliding beam accelerators; magnetic field measurement; proton accelerators; storage rings; superconducting magnets; synchrotrons; LHC; SSS3; SSS4; Short Straight Section; harmonics; magnetic field measurement; main quadrupoles; Assembly; Coils; Large Hadron Collider; Lattices; Magnetic field measurement; Magnetic properties; Magnetic variables measurement; Packaging; Prototypes; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2002.1018732

Filename

1018732