Tests and Field Map of LHCb Dipole Magnet

Author

Losasso, M. ; Bersgma, F. ; Flegel, W. ; Giudici, P.A. ; Hernando, J.A. ; Jamet, O. ; Lindner, R. ; Renaud, J. ; Teubert, F.

Author_Institution

CERN, Geneva

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1700

Lastpage

1703

Abstract

The LHCb experiment at the Large Hadron Collider (LHC) at CERN is aimed to study CP violation and to measure the rare decays of B-mesons with exceptionally high precision. A 4 Tm dipole magnet is required for particle separation and momentum measurements. The 1600 ton warm magnet with sloping poles was installed and fully commissioned by the end of 2004. It is the first detector magnet of the four LHC experiments to have been aligned and commissioned in its final position. In this paper, the magnet installation in the underground cavern of Point 8 and its alignment on the beam line are shortly reviewed. Results of a first magnetic field mapping in the region of the magnet poles and the fringe field in the location of the RICH detectors are presented. The mechanical equipment used for the automatic displacement of the Hall probe array is described, together with the precision of the measurements obtained which are compared with TOSCA finite element calculations

Keywords

B mesons; CP invariance; Cherenkov counters; accelerator magnets; beam handling techniques; finite element analysis; magnetic devices; magnetic field measurement; meson hadronic decay; superconducting magnets; B-mesons; CERN; CP violation; Hall probe array; LHCb dipole magnet; LHCb experiment; Large Hadron Collider; RICH detectors; TOSCA finite element calculations; automatic displacement; beam line; detector magnet; fringe field; magnet poles; magnetic devices; magnetic field mapping; mechanical equipment; momentum measurements; particle separation; rare decays; sloping poles; Detectors; Displacement measurement; Finite element methods; Hall effect devices; Large Hadron Collider; Magnetic field measurement; Magnetic separation; Mechanical variables measurement; Particle measurements; Testing; Detectors; dipole magnet; magnetic devices; magnetic field measurement; testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.869655

Filename

1643188