A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations

A semi-analytical method to evaluate the effect of coil de-formations on the field-shape imperfections of the LHC dipole is presented. The deformation induced by the collaring procedure and by the thermal stresses is evaluated numerically with a finite element code. The vector field of mechanical di...

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Detalles Bibliográficos
Autores principales: Ferracin, P, Scandale, Walter, Todesco, Ezio, Tropea, P
Lenguaje:eng
Publicado: 1999
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/386681
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author Ferracin, P
Scandale, Walter
Todesco, Ezio
Tropea, P
author_facet Ferracin, P
Scandale, Walter
Todesco, Ezio
Tropea, P
author_sort Ferracin, P
collection CERN
description A semi-analytical method to evaluate the effect of coil de-formations on the field-shape imperfections of the LHC dipole is presented. The deformation induced by the collaring procedure and by the thermal stresses is evaluated numerically with a finite element code. The vector field of mechanical displacements is approximated with truncated Taylor and Fourier series. The fitting function agrees with the numerical data to within less that 10 mm. The decom-position in modes of the truncated series permits identification of displacements which are dangerous for the multi-polar content and how they could be cured. An application to compare two designs of the LHC dipole is given.
id cern-386681
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-3866812023-05-31T13:23:55Zhttp://cds.cern.ch/record/386681engFerracin, PScandale, WalterTodesco, EzioTropea, PA Method to Evaluate the Field-Shape Multipoles Induced by Coil DeformationsAccelerators and Storage RingsA semi-analytical method to evaluate the effect of coil de-formations on the field-shape imperfections of the LHC dipole is presented. The deformation induced by the collaring procedure and by the thermal stresses is evaluated numerically with a finite element code. The vector field of mechanical displacements is approximated with truncated Taylor and Fourier series. The fitting function agrees with the numerical data to within less that 10 mm. The decom-position in modes of the truncated series permits identification of displacements which are dangerous for the multi-polar content and how they could be cured. An application to compare two designs of the LHC dipole is given.LHC-Project-Report-287CERN-LHC-Project-Report-287oai:cds.cern.ch:3866811999-04-23
spellingShingle Accelerators and Storage Rings
Ferracin, P
Scandale, Walter
Todesco, Ezio
Tropea, P
A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title_full A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title_fullStr A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title_full_unstemmed A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title_short A Method to Evaluate the Field-Shape Multipoles Induced by Coil Deformations
title_sort method to evaluate the field-shape multipoles induced by coil deformations
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/386681
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