Influence of mechanical tolerances on field quality in the LHC main dipoles

Author

Scandale, W. ; Todesco, E. ; Tropea, P.

Author_Institution

LHC Div., CERN, Geneva, Switzerland

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

73

Lastpage

76

Abstract

We evaluate the influence of mechanical tolerances in the field quality in the LHC dipoles. We show that the most relevant effect is due to tolerances on the coil and on the internal part of the collars. The sensitivities of the field error multipoles on the mechanical tolerances are worked out using a finite element model of the dipole cross section. A Monte Carlo method is used to simulate the overall effect of both collar and coil tolerances on field quality. Correlation between random multipoles is worked out, and a comparison with the target table of the LHC field errors is given.

Keywords

Monte Carlo methods; accelerator magnets; colliding beam accelerators; finite element analysis; proton accelerators; storage rings; superconducting magnets; LHC field errors; LHC main dipoles; Monte Carlo method; collars; field error multipoles; field quality; finite element model; mechanical tolerances; random multipoles; Finite element methods; Geometry; Large Hadron Collider; Shape; Stress; Structural beams; Superconducting cables; Superconducting coils; Superconducting magnets; Temperature;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828179

Filename

828179