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A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS

A new East Fast-Extraction System is under construction in the SPS, to supply particles with a maximum batch length of 7.8 us and 10.5 us to the LHC and to CNGS (CERN Neutrino to Gran Sasso), respectively. The extraction septum magnets actually used at the SPS have been designed for slow extraction...

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Autores principales: Schröder, G H, Weisser, W, Carlier, E, Dieperink, J H, Ducimetière, L, Goddard, B, Lázár, C, Mayer, M, Vossenberg, Eugène B, Weterings, W
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:http://cds.cern.ch/record/447554
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author Schröder, G H
Weisser, W
Carlier, E
Dieperink, J H
Ducimetière, L
Goddard, B
Lázár, C
Mayer, M
Vossenberg, Eugène B
Weterings, W
author_facet Schröder, G H
Weisser, W
Carlier, E
Dieperink, J H
Ducimetière, L
Goddard, B
Lázár, C
Mayer, M
Vossenberg, Eugène B
Weterings, W
author_sort Schröder, G H
collection CERN
description A new East Fast-Extraction System is under construction in the SPS, to supply particles with a maximum batch length of 7.8 us and 10.5 us to the LHC and to CNGS (CERN Neutrino to Gran Sasso), respectively. The extraction septum magnets actually used at the SPS have been designed for slow extraction over several seconds, have large cooling and electrical power demands and need frequently maintenance in a high radiation environment.<BR> A fast system of only 250 us pulse duration has therefore been developed, using a half-sine excitation pulse with a superimposed third harmonic. The short pulse duration requires very thin magnetic yoke laminations, which can not easily be stamped and stacked. Profiting from a development for the LHC beam dump kicker magnets, the yoke is therefore built-up from tape-wound cylindrical cores, employing 50 um thick Si-steel tape. Thirty two cores are stacked longitudinally to produce a yoke of 3.2 meter length. The aperture is cut radial into each cylinder. The cores are radial compressed by spring-loaded pistons inserted in strong stainless-steel frames to provide mechanical stability. The 5+1 mm thick copper/iron septum is separated from the excitation current loop and acts as a passive eddy current screen. This allows separating the vacuum of the magnet from that of the circulating-beam channel, avoiding the need of using UHV material.<BR> This paper presents the magnet and generator prototype design as well as simulation and measurement results.
id cern-447554
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
record_format invenio
spelling cern-4475542023-05-05T13:07:51Zhttp://cds.cern.ch/record/447554engSchröder, G HWeisser, WCarlier, EDieperink, J HDucimetière, LGoddard, BLázár, CMayer, MVossenberg, Eugène BWeterings, WA Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGSAccelerators and Storage RingsA new East Fast-Extraction System is under construction in the SPS, to supply particles with a maximum batch length of 7.8 us and 10.5 us to the LHC and to CNGS (CERN Neutrino to Gran Sasso), respectively. The extraction septum magnets actually used at the SPS have been designed for slow extraction over several seconds, have large cooling and electrical power demands and need frequently maintenance in a high radiation environment.<BR> A fast system of only 250 us pulse duration has therefore been developed, using a half-sine excitation pulse with a superimposed third harmonic. The short pulse duration requires very thin magnetic yoke laminations, which can not easily be stamped and stacked. Profiting from a development for the LHC beam dump kicker magnets, the yoke is therefore built-up from tape-wound cylindrical cores, employing 50 um thick Si-steel tape. Thirty two cores are stacked longitudinally to produce a yoke of 3.2 meter length. The aperture is cut radial into each cylinder. The cores are radial compressed by spring-loaded pistons inserted in strong stainless-steel frames to provide mechanical stability. The 5+1 mm thick copper/iron septum is separated from the excitation current loop and acts as a passive eddy current screen. This allows separating the vacuum of the magnet from that of the circulating-beam channel, avoiding the need of using UHV material.<BR> This paper presents the magnet and generator prototype design as well as simulation and measurement results.CERN-SL-2000-033-BToai:cds.cern.ch:4475542000-07-18
spellingShingle Accelerators and Storage Rings
Schröder, G H
Weisser, W
Carlier, E
Dieperink, J H
Ducimetière, L
Goddard, B
Lázár, C
Mayer, M
Vossenberg, Eugène B
Weterings, W
A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title_full A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title_fullStr A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title_full_unstemmed A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title_short A Novel Eddy Current Septum Magnet for SPS Extraction towards LHC and CNGS
title_sort novel eddy current septum magnet for sps extraction towards lhc and cngs
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/447554
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