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A Scaling Law for the Snapback in Superconducting Accelerator Magnets

The decay of the sextupole component in the bending dipoles during injection and the subsequent snapback at the start of beam acceleration are issues of common concern for all superconducting colliders built or in construction. Recent studies performed on LHC and Tevatron dipole magnets revealed man...

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Detalles Bibliográficos
Autores principales: Bottura, L, Ambrosio, G, Bauer, P, Haverkamp, M, Pieloni, T, Sanfilippo, S, Velev, G
Lenguaje:eng
Publicado: 2005
Materias:
Acceso en línea:https://dx.doi.org/10.1109/TASC.2005.849535
http://cds.cern.ch/record/832902
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author Bottura, L
Ambrosio, G
Bauer, P
Haverkamp, M
Pieloni, T
Sanfilippo, S
Velev, G
author_facet Bottura, L
Ambrosio, G
Bauer, P
Haverkamp, M
Pieloni, T
Sanfilippo, S
Velev, G
author_sort Bottura, L
collection CERN
description The decay of the sextupole component in the bending dipoles during injection and the subsequent snapback at the start of beam acceleration are issues of common concern for all superconducting colliders built or in construction. Recent studies performed on LHC and Tevatron dipole magnets revealed many similarities in the snapback characteristics. Some are expected, e.g. the effect of operational history. One particular similarity, however, is striking and is the subject of this paper. It appears that there is a simple linear relation between the amount of sextupole drift during the decay and the magnet current (or field) change during the ramp required to resolve the snapback. It is surprising that the linear correlation between snapback amplitude and snapback field holds very well for all magnets of the same family (e.g. Tevatron or LHC dipoles). In this paper we present the data collected to date and discuss a simple theory that explains the scaling found.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
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spelling cern-8329022019-09-30T06:29:59Zdoi:10.1109/TASC.2005.849535http://cds.cern.ch/record/832902engBottura, LAmbrosio, GBauer, PHaverkamp, MPieloni, TSanfilippo, SVelev, GA Scaling Law for the Snapback in Superconducting Accelerator MagnetsAccelerators and Storage RingsThe decay of the sextupole component in the bending dipoles during injection and the subsequent snapback at the start of beam acceleration are issues of common concern for all superconducting colliders built or in construction. Recent studies performed on LHC and Tevatron dipole magnets revealed many similarities in the snapback characteristics. Some are expected, e.g. the effect of operational history. One particular similarity, however, is striking and is the subject of this paper. It appears that there is a simple linear relation between the amount of sextupole drift during the decay and the magnet current (or field) change during the ramp required to resolve the snapback. It is surprising that the linear correlation between snapback amplitude and snapback field holds very well for all magnets of the same family (e.g. Tevatron or LHC dipoles). In this paper we present the data collected to date and discuss a simple theory that explains the scaling found.CERN-AT-2005-003-MTMoai:cds.cern.ch:8329022005-03-30
spellingShingle Accelerators and Storage Rings
Bottura, L
Ambrosio, G
Bauer, P
Haverkamp, M
Pieloni, T
Sanfilippo, S
Velev, G
A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title_full A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title_fullStr A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title_full_unstemmed A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title_short A Scaling Law for the Snapback in Superconducting Accelerator Magnets
title_sort scaling law for the snapback in superconducting accelerator magnets
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1109/TASC.2005.849535
http://cds.cern.ch/record/832902
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